VAV500 Multi-functional variable air volume controller, analogue ...

Product description 

VAV500 

Multi-functional variable air volume controller, analogue, LON, BACnet, Modbus 

Microprocessor controlled, high-speed adaptive control system 

for variable control of room supply air and room exhaust 

air volume fl ows, particularly suitable for clean rooms 

and laboratories. Advanced requirements need a heating 

or cooling, and a pressurization of the room. In addition to 

these features the multi-functional fl ow controller VAV500 

provide up to 7 analogue inputs 0 (2) ... 10V DC for connecting 

consumers (e.g. fume hood controller FC500) and 

calculates the room balance. In network operation (LON, 

BACnet, Modbus) up to 16 consumers are accounted for. 

The retrofi t interfaceboards LON, BACnet or Modbus ensure 

an individual, effi cient and cost-effective direct connection 

to the building management system (BMS). 

Product description ● Room balance ● Performance features 

A high-speed control algorithm compares the setpoint with 

the actual value measured by a differential pressure transmitter 

and controls the air volume quickly, precisely and 

steadily, independent of pressure fl uctuations in the duct 

system. The system data and setpoint values are freely 

programmable and will be saved voltage fail-safe in the EE- 

PROM. 

Operating mode and setpoint selection 

Analogue, LON, BACnet, Modbus 

The multi-functional variable fl ow controller VAV500 is 

available in four versions. The main distinguishing feature 

is the setpoint setting. The following control and operating 

modes are supported, depending on the version: 

Type Operating mode 

Control mode 

variable constant 

VAV500 (VAV) (CAV) 

Analogue 0(2)...10V -A Yes No 

Digital (Relay contact) -A No Yes 

(1-3 point) 

LON, FTT-10A -L Yes Yes 

BACnet, MS/TP, RS485 -B Yes Yes 

Modbus, RS485 -M Yes Yes 

All setpoints and actual values are available as analogue 

inputs or outputs 0(2)...10V DC (VAV500-A model) or via 

the network (VAV500-L, VAV500-B, VAV500-M models) as 

standard variables (SNVT) or objects. The LonMark specifi - 

cations are compliant with the master list. 

Models and control speed 

The SCHNEIDER VAV500 volume fl ow controllers are 

available as round or rectangular models in steel or PPs 

(polyproylene, fi re retardant) and are characterized by highspeed 

(control time < 3 s for a 90 ° angle) and stable control. 

The multi-functionality of VAV500 optimizes room conditions 

and means additional comfort, safety and value for the user. 

Performance features 

• High-speed, adaptive control algorithm for precise and 

stable control 

• Control time < 3 s for a 90 ° angle 

• Suitable for supply air and exhaust air volume 

fl ow control in laboratories and clean rooms (note 

suffi ciently large room leak) 

• Additional temperature control loop for heating and / 

or cooling 

• Additional pressure cascade control loop 

• Room balancing for up to 16 users in the network, or 

up to 7 consumers in the analogue mode (e.g. exhaust 

values 0(2)...10V DC from fume hoods) 

• All system data will be saved voltage fail-safe in the 

EEPROM 

• Free programming of system data and retrieval of all 

actual values 

• Monitoring of the customer ventilation system by 

integrated monitoring of the supply air/exhaust air 

setpoint that is to be regulated 

• Closed loop 

• Static differential pressure transmitter for continuous 

measurement of the actual value within the range 

3...300 pa (optionally 8...800 pa) with high long-term 

stability. 

• Analogue setpoint input 0(2)...10V DC/1mA 

• Analogue actual value output 0(2)...10V DC/10mA 

• High-speed, stable, precise control through 

direct actuation of the servomotor with feedback 

potentiometer 

• Three free programmable relays with potential-free 

contact 

• Four digital inputs for forced control (e.g. damper shut, 

on/off) 

• Direct forced control via digital inputs for the functions 

V MIN , V MED , V MAX and damper = SHUT (CAV 

operation). Night-time reduction (reduced operation) 

can be achieved via V MIN . 

• Flexible field bus interface, LON, BACnet, Modbus 

• Supply voltage 24V AC provided by customer or 230V 

AC optional via internal transformer 

Technical Documentation VAV500 • Date: 07/2011 • Subject to change without prior notice • www.schneider-elektronik.com 

1



Functional description • Variable volume fl ow controller (VAV500), analogue setpoint control 

Volume flow measurement with a static differential 

pressure transmitter 

Using a suitable measuring device (maintenance-free measuring 

system, venturi measuring tube, orifi ce ring, measuring 

tube or measuring cross) the differential pressure is 

determined by a differential pressure transmitter. Measurement 

is very accurate and stable over the entire measuring 

range of 3...300 pa (optionally 8...800 pa), making it possible 

to regulate a volume fl ow range of 10:1. 

Unlike the thermo-anemometric measuring principle, air 

does not fl ow through the static differential pressure transmitter, 

making it particularly suitable for measuring in dusty 

and contaminated (corrosive) media (its suitability should 

be checked in individual cases. The suitability of the thermo-anemometric 

measuring principle for such media is very 

limited, as the sensor becomes dirty or is affected by corrosive 

air and thus measurement may be very imprecise or 

inaccurate. 

Volume flow settings V MIN , V MED , V MAX 

Setting of the volume fl ow (programming) is done via the 

service module SVM100 or the Laptop (with software 

PC2500). The desired volume fl ow is entered as a numeric 

value in m 3 /h. 

Function Volume flow Demand signal w 

V MIN minimum 0(2) ≤ w ≤ 10V DC 

V MED median value 0(2) ≤ w ≤ 10V DC 

V MIN ≤ V MED ≤ V MAX 

V MAX maximum w = 10V DC 

The allocation of the analogue demand signal w to the volume 

fl ow V MIN and V MAX accentuates the VAV curve (variable 

operating mode). 

The volume fl ow value V MED is only available in constant 

operating mode (see CAV curve) and is digitally controlled 

(e.g. via relay contacts). V MED must always lie between 

V MIN and V MAX . 

Demand signal w (setpoint setting via 

analogue input A8-In) 

With the demand signal w (setpoint selection), the volume 

fl ow can be constantly switched between V MIN and V MAX , at 

which the following is always true: 

0m 3 /h = 0(2)V DC, V MAX = 10V DC 

The regulated volume fl ow actual value (A2-Out) is available 

as 0(2)...10V DC output voltage. Various master/slave 

operating modes can be implemented with this signal. 

Shield factor (C value) 

The shield factor is the geometry-dependent constant of the 

measuring device used (construction of the damming body 

and geometric dimensions). 

The volume fl ow is calculated according to the following 

formula: 

Function Meaning Notes 

V MIN 

. 

V MAX 

Shield 

factor 

Type 

default 

V MED 

Offset 

V = c . 

p 

Programming of the volume flow controller 

Using the service module SVM100 or the Laptop the volume 

fl ow controller is programmed as follows: 

minimum volume 

fl ow 

maximum volume 

fl ow 

measuring device 

constant 

controller 

confi guration 

interim value 


fi xed +/- value for 

constant loads 

shield factor 

S * 1,5 (rule of thumb) 

shield factor 

S * 16 (rule of thumb) 

10...2000 

analogue (VAV) 

digital (CAV) 

digital operating mode 

only (CAV) 

+9990 m 3 /h to 

- 9990 m 3 /h 

Type default (setpoint value = analogue or digital) 

The controller configuration specifi es the operating mode 

(analogue or digital). 

In analogue operating mode (variable volume fl ow controller 

= VAV) the volume fl ow is regulated linearly based on 

the analogue demand signal w (setpoint value via analogue 

input A8-In). 

In digital operating mode (constant volume fl ow controller = 

CAV) the volume fl ow is regulated in stages based on the 

digital inputs (In2, In3 and In4). Up to four different volume 

fl ows (V MIN , V MED and V MAX and V EMERGENCY ) can be regulated. 

An analogue demand signal is not required. 

In both operating modes (VAV and CAV) pressure fl uctations 

in the duct system are recognized and automatically 

regulated. 

Offset for integrating constant loads 

. 

V = air volume 

c = geometrical constant 

(shield factor) 

p = differential pressure 

= air density 

With the offset value a fi xed value is programmed (+9990 

to - 9990 m3/h) that is added to the volume fl ow setpoint (+ 

offset = increases the volume fl ow setpoint, - offset decreases 

the volume fl ow setpoint). This makes it possible to 

integrate constant loads. 

A constant difference between supply and exhaust air is 

therefore possible in master/slave mode. This function is 

particularly important in airtight rooms (e.g. clean rooms). 

2 Technical Documentation VAV500 • Date: 07/2011 • Subject to change without prior notice • www.schneider-elektronik.com



Operating modes • Variable volume flow controller (VAV) • Constant volume flow controller (CAV) 

Notes on controller dimensioning (dimensions and volume 

flow) 

0 = contact open (no current) 

1 = contact closed (under current) 

Due to measurement accuracy it must be ensured that at 

the minimum volume fl ow V MIN the fl ow velocity in the volume 

fl ow controller does not fall below 2 m/s. 

Due to noise development, in laboratory applications it must 

be ensured that at the maximum volume fl ow V MAX the fl ow 

velocity in the volume fl ow controller does not exceed 7,5 

m/s. 

The volume fl ows V MIN , V MED , V MAX are freely programmable 

within the range 50...25.000 m 3 /h, but care must be 

taken to ensure suitable volume fl ow controller dimensions 

with regard to the volume fl ow range while at the same time 

taking the fl ow velocity into account. 

See the terminal diagram on page 23 for wiring information. 

Determination volume flow for laboratory applicationstaking 

the flow velocity v into account 

Volume flow 

Flow velocity v 

V MIN v ≥ 2 m/s 

V MAX v ≤ 7,5 m/s 

Analogue operating mode 

Variable volume flow controller (VAV) 

Diagram 1: variable volume flow control (VAV) 

[V] 

V MAX 

10 

[V] 

10 

In variable volume fl ow operating mode the desired volume 

fl ow is predefi ned by a demand signal w (setpoint setting). 

The value range of the demand signal is 0(2)...10V DC. 

The volume fl ow can be constantly controlled between V MIN 

und V MAX with the demand signal w, at which the following 

is always true: 

Leading signal w (A-In1) 

9 

8 

7 

6 

5 

4 

3 

2 

V MIN 

9 

8 

7 

6 

5 

4 

3 

2 

Air volume actual value (A-Out1) 

0m 3 /h = 0(2)V DC 

0(2) ≤ V MIN ≤ 10V DC 

V MAX = 10V DC 

1 

0 

0 200 400 600 800 1000 [m 3 /h] 

1 

0 

Always note: 

1. Minimum control value VMIN = shield factor B * 1.5 

2. Values



Master / slave sequence control • Equal percentage ratio • Constant difference 

Digital operating mode 

Constant volume flow controller (CAV) 

In constant volume fl ow operating mode (digital operating 

mode) the desired volume fl ow is controlled based on the 

digital inputs. 

The available operating stages are shown in diagram 2 and 

Table 2. 1 point, 2 point, 3 point or 4 point operation can 

easily be implemented by direct control of the digital inputs. 

The volume fl ows are programmed to the values V MIN = 875 

m 3 /h, V MED = 1750 m 3 /h and V MAX = 2150 m 3 /h. V MED must 

always lie between V MIN and V MAX . The volume fl ow actual 

value signal (A2--Out) correlates with the regulated volume 

fl ow. 

The following is valid for the volume fl ow actual value: 

SHUT = 0m 3 /h = 0(2)V DC 

0(2) ≤ V MIN ≤ 10V DC 


V MAX = 10V DC 

See above and the terminal diagram on page 23 for information 

on the digital input wiring. 

Master-slave sequence control with equal 

percentage ratio in VAV operation 

This master-slave sequence control is always used when 

room pressure must be maintained at an equal percentage 

ratio of supply and exhaust air. Suffi cient replacement fl ow 

of the difference between the supply and exhaust air must 

be ensured in this operating mode. 

The master controller is programmed with the volume fl ow 

values V MIN and V MAX and the demand signal w is added 

on directly. The volume fl ow actual value of the master controller 

provides the demand signal for the slave controller, 

which can be programmed with other V MIN and V MAX volume 

fl ow values depending on the application. 

If the master controller is mounted in the supply air and 

the slave controller in the exhaust air and positive (+) room 

pressure is required, the slave controller must be programmed 

with the lower percentage volume fl ow values V MIN 

and V MAX in relation to the master controller. 

If negative (-) room pressure is required, the slave controller 

must be programmed with the lower percentage volume 

fl ow values V MIN and V MAX in relation to the master controller. 

Sample settings for master/slave controllers: 

Slave (+) Master Slave(-) 

V MIN 240 300 360 

V MAX 600 750 900 

Diagram 2: Constant volume flow control (CAV) 

Function Input 1 Input 2 

V MAX 0 0 

V MED 1 1 

V MIN 1 0 

SHUT 0 1 

Table 2: 

Digital inputs 

Funktion In 2 In 3 In4 

V MAX 0 0 0 

V MIN 1 0 0 

V MED 0 1 0 

V EMERGENCY or damper SHUT 0 0 1 

Contact open = 0, contact closed = 1. 

The digital input In1 is the highest priority and switches the 

fl ow controller VAV500 ON or OFF. 

Schematic diagram: Master-slave sequence control 

in VAV operation 

Room supply 

VAV 

dp M 


Master 

Leading signal w 

SHUT 

Air volume actual value 

0 500 1000 1500 2000 2500 [m 3 /h] 

Damper position 

SHUT 

V MIN 

V MIN 

Forced control VAV operation in 

digital operating mode (CAV) 

T 

Room exhaust 

VAV 

V MED 

V MED 

dp M 


Slave 

V MAX 

V MAX 

Air volume 

actual value 


Building Management 

System 

System network 

DDC 

substation 

The master slave sequence control applies for both equal 

percentage ratio and constant difference between supply 

and exhaust air. The demand signal w (A8-In) is added on 

to the master controller and the volume fl ow actual value 

(A2-Out) provides the demand signal for the slave controller. 

This ensures that the slave controller always follows the 

master controller. For safety reasons, master/slave sequence 

control must always be given preference over parallel 

control. 

[V] 

10 

9 

8 

7 

6 

5 

4 

3 

2 

1 

0 





In the sample settings, the volume fl ow values VMIN und 

VMAX of the slave (+) controller were programmed to -20% 

(negative room pressure) in relation to the volume fl ow values 

of the master controller. For negative room pressure 

the volume fl ow values V MIN and V MAX of the slave (-) controller 

must be programmed to +20% in relation to the volume 

fl ow values of the master controller. 

The equal percentage ratio between supply and exhaust air 

is maintained throughout the entire volume fl ow range of 

V MIN to V MAX . 

Master / slave sequence control • Application examples 

Diagram 3: Sequence control (master/slave) in 

equal percentage ratio 

Leading signal w (A-In1) 

[V] 

10 

9 

8 

7 

6 

5 

4 

3 

2 

[V] 

10 

9 

8 

7 

6 

5 

4 

3 

2 


V MIN 

V MAX 

V MAX 

Master/slave sequence control with constant 

difference in VAV operating mode 

1 

0 

1 

0 

This form of master/slave sequence control is used when 

room pressure with a constant difference between supply 

and exhaust air is required. This operating mode is selected 

for airtight rooms (e.g. clean rooms). 

The master controller is programmed with the volume fl ow 

values V MIN and V MAX and the demand signal w is added 

on directly. The volume fl ow actual value of the master controller 

provides the demand signal for the slave controller, 

which is programmed with the same volume fl ow values 

V MIN and V MAX , depending on the application. 

In addition, the offset is also programmed in the slave controller. 

If the master controller is mounted in the supply air 

and the slave controller in the exhaust air and positive (+) 

room pressure is required, the slave controller must be programmed 

with a negative offset. 

[V] 

10 

9 

8 

7 

6 

5 

4 

0 200 400 600 800 1000 [m 3 /h] 

V MIN 

V MIN 

V MIN 

V MAX 

V MAX 

Air volume-Master 

Air volume-Slave(-) 

Air volume-Slave(+) 

Diagram 4: Sequence control (master / slave) with 

constant difference 

konstante 

Differenz 

Zu-/Abluft 

[V] 

10 

9 

8 

7 

6 

5 

4 

If negative (-) room pressure is required, the slave controller 

must be programmed with a positive offset. 

3 

2 

1 

3 

2 

1 

Sample settings for master/slave controllers: 

0 

0 

0 200 400 600 800 1000 [m 3 /h] 

Slave (+) Master Slave(-) 

V MIN 

V MAX 

Volumenstrom-Master 

V MIN 300 300 300 

V MAX 750 750 750 

Offset - 150 0 + 150 

V MIN 

V MIN 

V MIN 

V MAX 

V MAX 

V MAX 

Volumenstrom-Slave(-) 

Volumenstrom-Slave(+) 

In this example, the volume fl ow values V MIN and V MAX of 

the slave (+) controller and the slave (-) controller were programmed 

with the volume fl ow values of the master controller. 

For negative room pressure the offset of the slave (-) 

controller must be programmed with +150 m 3 /h. 

The constant difference between supply and exhaust air 

is maintained over the entire volume fl ow range of V MIN to 

V MAX . 

Master / slave sequence control in CAV operating 

mode 

In CAV operating mode the digital inputs of the master controller 

are wired to control the different operating stages 

(see table 2). The volume fl ow actual value (A2-Out) of the 

master controller provides the demand signal for the slave 

controller. 

DDC / BMS control 

If the master controller is controlled via a DDC/BMS (demand 

signal w or digital control) the volume fl ow actual value 

of the slave controller can be added on as feedback and 

therefore used to monitor the functioning of both volume 

fl ow controllers (master and slave). 


5



Master / slave sequence control • Application examples 

Connection plan VAV operation 

The analogue demand signal is added on by the signal 

transmitter (e.g. temperature sensor, setpoint device) or by 

the DDC or BMS. The volume fl ow actual value of the master 

VAV in turn provides the demand signal for the slave 

VAV. 

The volume fl ow actual value signal of the slave VAV can be 

added on to the DDC or BMS as a feedback signal, which 

makes it possible to check the functionality of the entire master/slave 

sequence control. Forced control via terminal X2 

is also possible and is shown in table 1 on page 3. 

Connect 

via safety 

transformer 

Master 

Slave 

X8 

X8 

X8 

24V AC 

supply 

voltage 

N 

N 

10...20 VA 

20 19 

22 21 

X30 

max. 10 VA 

20 19 

X30 

L 

L 

X11 

X11 

Leading signal w 

0(2)...10V DC 

105 104 

48 47 

0(2)...10V DC 

GND 

105 104 

48 47 

GND 

RAM500 



actual value 

RAM500 


GND 

0(2)...10V DC 


actual value 

from source, 

DDC/GLT 

to 

DDC/GLT 

Connection plan 

VAV operation 

Connection plan CAV operation 

The various CAV operating stages are shown in table 2 on 

page 4. 

When both digital inputs (input 1 and input 2) are not under 

current, i.e. the contacts are open, the volume fl ow V MAX is 

regulated. When both inputs are under current the volume 

fl ow V Med is regulated. 

Connect 

via safety 

transformer 

Master 

Slave 

20 19 

X8 

X8 

24V AC 

supply 

voltage 

N 

22 21 

X11 

N 

10...20 VA 

max. 10 VA 

20 19 

X8 X30 

L 

L 

CAV operating modes 

X11 

X11 

In2 

48 47 

0(2)...10V DC 

GND 

105 104 

48 47 

In3 

In4 

39 40 41 42 43 44 



actual value 

RAM500 


CAV-operating mode (digital) 

VAV-operating mode (analogue) 

Connection plan 

CAV operation 

The master is controlled in CAV operating mode and the 

slave in VAV operating mode. Here the slave also follows 

the actual value of the master. Feedback of the volume fl ow 

actual value to the DDC/BMS is also possible. 

GND 

0(2)...10V DC 


actual value 

to 

DDC/GLT 

Room plan 1 ● Variable volume fl ow controller, analogue setpoint value via group controller GC10 

Room plan 1 shows the interconnection of up to 10 FC500 

fume hood controllers (Ain1 to Ain10) with the GC10 group 

controller. The group controller can control up to four freely 

confi gurable VAV-A volume fl ow controllers for room supply/ 

exhaust air (Aout1 to Aout4). The internal transformer (optional) 

provides the supply voltage for the volume fl ow controllers 

24V AC, which simplifi es planning and makes implementation 

more cost-effi cient. The analogue inputs Ain1 to 

Ain10 are summated, can be combined in any number of 

groups on the analogue outputs Aout1 to Aout4 and provide 

an analogue setpoint value for the variable volume fl ow 

controller. A room by room LON connection to the building 

services management system is optionally possible. 

For a detailed description, see the technical documentation 

GC10 or for extended functionality LCO500. 

Legend: 

FC 

Fume hood #1 

FC 

Fume hood #2 

Fume hood 

#3 bis #9 

FC 

Fume hood #10 

Optional: 

Room control panel 

RBG100 

LED-Night operation 

Button cancel night operation 

FC 

GC10 

LON300 

RBG100 

VAV500-A 

= Fume hood controller, fully variable, 

analogue Output 0(2)...10V DC 

= Group controller, 10 analogue inputs 

= LON-module, FTT-10A (optional) 

= Room control panel for canceling the night 

operation (optional) 

= high speed VAV500 with analogue input 

0...10V DC 

cable type: IY(St)Y 4x2x0,8 


Ain1 … Ain10 = 10 analogue inputs 0...10V DC 

Sin1 … Sin10 = 10 alarm inputs 

T/N 

= Day/Night operation fume hood (roomwise) 

Room supply 

VAV 

dp 

M 

Ain1 Ain2 

Sin1 Sin2 

T/N T/N 

Aout1 

24V AC 

Ain3 

Sin3 

T/N 

… 

… 

... 

Ain10 

Sin10 

T/N 

Room group controller 

GC10 

Din1 

K2 

Aout2 

24V AC 

Room exhaust 

VAV 

dp 

M 

Din1 

= Digital input button cancel night operation 

K2 

= Relay contact for LED-Day/Night 

Aout1 … Aout4 = analogue outputs 0...10V DC 

24V AC = 24V AC supply voltage for VAV-A 

Attention! Wires for LON A/B must be twisted pair. 

Don´t exceed max. cable lenght. 



Optional: 

Transformer 

T = 24V AC/ 

30 VA 

Optional: 

LON300 

LON-module 

FT-X1 (FTT-10A) 

free topology 



mains 

230V AC +-10% 

Room fault alarm 

Day/Night operation 

(roomwise) 

Building Management 

System 

LON-NETWORK, FT-X1 (FTT-10A), LON A/B 





Multi-functional applications in analogue- or network operation • Heating and/or Cooling 

Multifunctional applications in analogue or 

network operation (LON, BACnet, Modbus) 

In addition to those described in the following pages classic 

fl ow control modes such as variable volume fl ow controller, 

3-point constant fl ow regulators, balancing volume 

controller and room fl ow difference controller in VAV500-A 

or VAV500-LON are implemented following additional multifunctional 

applications: 

• actual value of pressure measuring 

• own temperature control loop for heating 

and / or cooling 

• own pressure cascade control loop 

(VAV500-LON only) 

Actual value of pressure measuring 

Pressure measuring or other analogue values can be connected 

to the analogue inputs A1-in to A7-in (value range: 

0(2)...10V DC) and are available as standard variable 

(SNVT) via the LON network. 

Network functionality (LON, BACnet, Modbus) 

The control (temperature and pressure cascade) on the 

LON network with the appropriate LON variables (SNVTs) 

is described as an example. The same control principle is 

even valid for the supported networks BACnet and Modbus, 

and differ only in the variable types and variable names. 

The LON functions of fl ow controller VAV500-LON are implemented 

according to LonMark specifi cation 8010 „VAV 

controllers (Variable Air Volume)“. In implementing the functionality, 

not all functions of the LonMark specifi cation 8010 

„VAV controller“ were considered due to the functionality of 

the pressure cascade control. See SNVT list on page 9 to 

13 

Self temperature control loop for heating 

and/or cooling 

The multi-functional fl ow control or VAV500-LON or 

VAV500-A has a built-in temperature control. The temperature 

is controlled by a change in the nominal volume fl ow 

and/or an additional heating or cooling coil. 

The multi-functional fl ow control VAV500 supports three different 

temperature control modes: 

1. External increase of the set volume flow (temperature 

control by the BMS over the network) 

Via the LON variable nviFlowTempAddon the value of this 

variable is added to the calculated setpoint fl ow value and 

thus raised. The temperature control is taking over by the 

building management system (BMS), which of course also 

requires the actual value of the room temperature. 

2. Independent temperature control (actual 

temperature value via the network) 

In this temperature control mode the actual room temperature 

value of an external LON temperature sensor is transmitted 

to the multi-functional fl ow controller VAV500-LON 

via the LON-variable nviTemperature. The room temperature 

setpoint is set with the LON-constant (nciTemperature). 

Bit0 of the LON constant nciDeviceState determines 

whether heating (Bit0 = 0) or cooling (Bit0 = 1) is selected. 

During cooling is: 

If the room temperature actual value nviTemperature exceeds 

the setpoint nciTemperature, the nominal volume 

fl ow will be increased by the LON-constant value nciTempOffset 

per degree exceeding. 

During heating is: 

If the room temperature actual value nviTemperature falls 

below the setpoint nciTemperature, the nominal volume 

fl ow will be increased by the LON-constant value nciTempOffset 

per degree exceeding. 

The multi-functional fl ow control VAV500-LON can be connected 

directly to an analogue thermosensor KTY81. The 

measured value is as a LON variable nvoTemperature 

available. 

3. Independent temperature control (analogue or 

via the network) 

The independent temperature control needs a temperature 

sensor, which is connected to the VAV500. As a standard 

sensor, a sensor is implemented with a range from 0 ° C 

to 50 ° C at 0 V to 10 V output voltage. The heating and/or 

cooling coil can be controlled via the analogue outputs of 

A3-Out and A4-Out with the voltage range 0(2)...10V DC. 

When the independent temperature control is activated, the 

pressure cascade control can not be used. 

3.1.1 Activation via the network 

The independent temperature control system is activated or 

deactivated via the LON variable nciTempActiv. The control 

cycle is defi ned by nciControlTime and the P component is 

defi ned by the nciControlFactor. 

The setpoint is specifi ed via nciTemperature either static, 

or can be set dynamically via nviTemperature. In this case, 

nciTemperature must be set to 0. 

Bit0 of the LON constant nciDeviceState determines 

whether heating (Bit0 = 0) or cooling (Bit0 = 1) is selected. 

3.1.2 Analogue mode 

In addition to the temperature sensor, the temperature setpoint 

value as 0(2)...10V DC signal can be connected, thus 

allows a dynamic temperature control. 


7



Multi-functional applications in analogue- or network operation • Pressure cascade control loop 

The setpoint setting is therefore variable and constantly 

changeable. 

A constant temperature reference is given via the SVM100 

or the PC2500 PC software and is voltage fail-safe stored 

in EEPROM. 

Own pressure cascade control loop 

1. In analogue mode, the pressure cascade control is 

not currently implemented. 

2. Pressure cascade control in network operation 

The pressure cascade control via the LON network with the 

appropriate LON variables (SNVTs) is described examplary. 

The same control principle is even valid for the supported 

networks BACnet and Modbus, and differs only in the variable 

types and variable names. 

With the pressure cascade control, a volume fl ow-prioritized 

pressure control is realized. 

All the following information applies to a supply air. For exhaust 

air the specifi ed logic is inverted. 

First, the nominal fl ow rate is determined, for example the 

addition of the actual values of the exhaust air fl ow volumes. 

The pressure cascade requires the following parameters: 

nciPressDZoneP dead zone is the area in actual 

pressure > setpoint pressure. In this 

area, no correction of the volume 

fl ow is performed. The value is a positive 

offset to the pressure setpoint. 

nciPressDZoneM dead zone is the area in actual 

pressure < setpoint pressure. In this 

area, no correction of the volume 

fl ow is performed. The value is 

a negative offset to the pressure 

setpoint. 

nciPressLimitP is the value carried out up to a 

correction of the volume fl ow is, if 

actual pressure > setpoint pressure. 

The value is a positive offset to the 

pressure setpoint. 

nciPressLimitM is the value carried out up to a 

correction of the volume fl ow is, if 

actual pressure < set point pressure. 

The value is a negative offset to 

the pressure setpoint. 

nciPressFlowStep is a limit to the maximum change of 

the fl ow rate per control step. 

nciPressPercentP is the maximum percentage by 

which the fl ow rate is increased if 

actual pressure > set point pressure. 

nciPressPercentM is the maximum percentage by 

which the fl ow rate is lowered if 

actual pressure < setpoint pressure. 

nciSensorPress 

nciPressNominal 

nciControlTime 

selects the type of the connected 

pressure sensor 

defines the pressure setpoint 

defines the control cycle 

If the pressure cascade control is activated the independent 

temperature control can not be used. 

Example of pressure cascade control: 

Given: 

Determined setpoint fl ow rate: 

1600 m³/h 

Setpoint pressure: nciPressNominal: -15 Pa Unterdruck 

Dead zone in the positive range: nciPressDZoneP: 5 Pa 

Dead zone in the negative range: nciPressDZoneM: 5 Pa 

Upper limit cascade: nciPressLimitP: 20 Pa 

Lower limit cascade: nciPressLimitM: 10 Pa 

Maximum change to the top: nciPressPercentP: 20% 

Maximum change to bottom: nciPressPercentM: 20% 

Case1: Actual value = -18 Pa No change since within the dead zone (nciPressNominal + nciPressDZoneP) 

Case2: Actual value = -11 Pa No change since within the dead zone (nciPressNominal - nciPressDZoneM) 

Case3: Actual value = -23 Pa Increase of the set fl ow rate to 1600 m³/h * 20% * min((23 – 15), 10) / 10 = 256 m³/h 

Case4: Actual value = -28 Pa Increase of the set fl ow rate to 1600 m³/h * 20% * min((28 – 15), 10) / 10 = 320 m³/h 

Case5: Actual value = -7 Pa Reduction of the nominal fl ow rate to 1600 m³/h * 20% * min((15 – 7), 20) / 20 = 128 m³/h 

Case6: Actual value = +11 Pa Reduction of the nominal fl ow rate to 1600 m³/h * 20% * min((15 + 11), 20) / 20 = 320 m³/h 


1. Node Object 



LON-Network interface • Standard Variables (SNVTs) 

Below you find the table overview of the network interface. For a detailed description of the network interface 

request the detailled SNVT Description VAV500-L. 

The node object # 0 provides mechanisms to analyze and infl uence the node. It manages all other objects of the node 

and occurs only once. It has no application, but takes care only of the nodes. It handles for example network management 

functions and status reports. 

Node object network variables: 

Mandatory Network Variables 

nviRequest SNVT Type: SNVT_obj_request Valid range: 0 s to 3600 s 

Function: 

Requesting various information and perform actions in the node. 

The following parameters can be processed: 

RQ_NORMAL: 

Initialize the node, reset the status 

RQ_DISABLED: Disable node 

RQ_UPDATE_STATUS: Query the status response via nvoStatus 

RQ_REPORT_MASK: Mask of all possible status bits 

RQ_SELF_TEST: Self-test of the node 

nvoStatus SNVT Type: SNVT_obj_status Valid range: 0 s to 3600 s 

Function: 

The output variable contains the answer to a question raised earlier about nviRequest 

with the required status: 

invalid_id: 

Incorrect object-ID requested or not available 

invalid_request: Wrong parameter requested or not available 

disabled: 

no function node (inactive) 

comm_failure: 

Communication failure 

fail_self_test: 

Self-test run error 

self_test_in_progress: Self-test activated 

nciMaxstsSendT SNVT Type: SNVT_elapsed_time Valid range: 0 s to 3600 s 

Function: 

Periodic transmission of nvoStatus. If the value = 0, then periodic transmission is disabled. 

2. Application object 

In the application objects the following types are distinguished: 

Open Loop Sensor 

Closed Loop Sensor 

Open Loop Actuator 

Closed Loop Actuator 

The described node is of type „Closed Loop Actuator“. 

nviExtFlow[16] SNVT Type: SNVT_fl ow Valid range: 0 l/s to 65534 l/s 

These 16 inputs are used for summation and for setpoint settings for variable fl ow rates. Via bindings to these 16 inputs, 

the volume fl ows of external devices or to a master-slave confi guration can be assigned via the LON network. 

nvoBoxFlow SNVT Type: SNVT_fl ow Valid range: 0 l/s to 65534 l/s 

This output shows the actual fl ow rate of fl ow controller, as measured through the analogue input of the pressure sensor. 

The variable is transmitted when the value has changed signifi cantly (adjusted with nciSendOnDltFlow) or if the heartbeat 

period has expired and its value has not changed in the meantime. 

nvoNomFlow SNVT Type: SNVT_fl ow Valid range: 0 l/s to 65534 l/s 

This value includes the set point of fl ow controller. 

nviFlowTempAddon SNVT Type: SNVT_fl ow Valid range: 0 l/s to 65534 l/s 

This variable increases the amount of air dynamically. The value of this variable will be added to the determined target 

value. Thus, for example an increase in the amount of air can be carried out for temperature control. 


9




nvoPressure SNVT Type: SNVT_fl ow Valid range: -100 Pa bis +100 Pa 

This value contains the actual room pressure value, as measured through the analogue input of the room pressure 

sensor. The variable is transmitted when the value has changed signifi cantly (adjusted with nciSendOnDtPress) or if the 

heartbeat period has expired and its value has not changed in the meantime 

nvoTemperature SNVT Type: SNVT_temp_p Valid range: -273,17 °C to +327,66 °C 

This value contains the actual value of the temperature (only with connected temperature sensor). 

nviTemperature SNVT Type: SNVT_temp_p Valid range: -273,17 °C to +327,66 °C 

This value contains the setpoint value for the independent temperature control. If the value in nciTemperature > 0, then 

the value of nciTemperature is used as reference. With version 2 of the temperature control this variable contains the 

current actual temperature. 

nvoDigiIn1 SNVT Type: SNVT_switch Valid range: [(100,0 1), (0,0 0)] 

Status check of the digital input 1 

nvoDigiIn2 SNVT Type: SNVT_switch Valid range: [(100,0 1), (0,0 0)] 

Status check of the digital input 2 

nvoNormalRedu SNVT Type: SNVT_switch Valid range: [(100,0 1), (0,0 0)] 

State of the device, reduced operation (0,0 0), or normal operation (100.0 1) 

nviDDCNormaRedu SNVT Type: SNVT_switch Valid range: [(100,0 1), (0,0 0)] 

This variable is used to switch between reduced operation (0,0 0) and normal operation (100.0 1). 

nvoDDCNormaRedu SNVT Type: SNVT_switch Valid range: [(100,0 1), (0,0 0)] 

Image of nviDDCNormalRedu (100.0 1) = Normal operation, (0,0 0) = reduced operation. 

nvoOnOff SNVT Type: SNVT_switch Valid range: [(100,0 1), (0,0 0)] 

State of the device is switched on (100.0 1) or off (0,0 0). 

nviDDCOnOff SNVT Type: SNVT_switch Valid range: [(100,0 1), (0,0 0)] 

This variable is used to switch off and on operating, (100.0 1) = on, (0,0 0) = off. 

nvoDDCOnOff SNVT Type: SNVT_switch Valid range: [(100,0 1), (0,0 0)] 

Image of nviDDCOnOff (100.0 1) = on, (0,0 0) = off. 

nvoRoomAlarm SNVT Type: SNVT_switch Valid range: [(100,0 1), (0,0 0)] 

State of the room alarm (100.0 1) = alarm active, (0,0 0) = no alarm. 

nvoFlapPosition SNVT Type: SNVT_switch Valid range: 0 % bis 100 % 

Value contains the position of the damper in %. 

nvoVersionVAV500 SNVT Typ: SNVT_str_asc Valid range: any string 

This variable contains the current software version of the device VAV500. 





3. Configuration parameter 

SNVT Type: SNVT_state 

nciHeartbeatnvo 

Valid range: any combination Default value: {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} 

Returns the selection of the variables sent during heartbeat. It allows multiple variables are selected at a time: 

Bit 0 = 1: nvoRoomAlarm (Default) 

Bit 1 = 1: nvoOnOff 

Bit 2 = 1: nvoNormalRedu 

Bit 3 = 1: nvoBoxFlow 

Bit 4 = 1: nvoNomFlow 

Bit 5 = 1: nvoTemperature 

Bit 6 = 1: nvoPressure 

Bit 7 = 1: nvoFlapPosition 

SNVT Type: SNVT_state 

nciDeviceState 

Valid range: any combination Default value: {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} 

Bit 0 = 0: independent temperature control: Heating 

Bit 0 = 1: independent temperature control: cooling 

Bit 1 = 0: pressure cascade: supply air 

Bit 1 = 1: pressure cascade: exhaust air 

SNVT Type: SCPTdelayTime 

nciMinOutTm Valid range: 0,0 bis 6553,4 sec. At 0,0 function is Default value: 5,0 

turned off. 

This parameter determines the minimum transmission time distance for all output variables. 

SNVT Type: SCPTmaxFlow 

nciFixFlowNorm 

Valid range: 0 l/s to 65534 l/s Default value: 0 l/s 

Value for consumers in the normal operation mode of the air fl ow controller. 

SNVT Type: SCPTminFlow 

nciFixFlowRedu 


Value for consumers in the reduced operation mode of the air fl ow controller. 


nciFlowRedu 


Value of the minimum fl ow rate of the air fl ow controller for reduced mode. Flow controller is confi gured as constant fl ow 

controller (nciVAVType is 3 or 13). 


nciFlowNorm 


Value for the maximum fl ow rate of air fl ow controller for normal operation. Flow controller is confi gured as constant fl ow 

controller (nciVAVType is 3 or 13). 

SNVT Type: SNVT_count 

nciPercentFlow 

Valid range: 0 % to 200 % Default value: 100 % 

Value for percentage volume fl ow of the air fl ow controller. 


nciVAVType 

Valid range: 0, 1, 2, 3, 11, 12, 13 Default value: 1 

Selects function of air fl ow controller. 

1 = summing, always on, summing selected channels and consumers 

11 = summing, on / off via LON, summing selected channels and consumers 

2 = room differential pressure sensor, always on, controls the difference between standard flow (operating) and 

FlowRedu (Reduced operation) and the sum of the selected channels and consumers 

12 = room differential pressure sensor, on / off via LON, controls the difference between standard flow (operating) and 

FlowRedu (Reduced operation) and the sum of the selected channels and consumers 


11




3 = Constant volume fl ow controller, always on, controls FlowRedu or FlowNorm, depending on the condition 

13 = Constant volume fl ow controller, on / off via LON, controls FlowRedu or FlowNorm, depending on the condition 

0 = as 1: summing, always on, summarise selected channels and consumers 


nciRoomAlarmFlow 

Valid range: 0 l/s to 65535 l/s Deafult value: 0 l/s 

Room alarm limit. The delay for the room alarm is fi xed at 5 minutes. 


nciSensorPress 

Valid range: 1 Deafult value: 1 

Selection of the pressure sensor. 

1 = -50 Pa to +50 Pa 

SNVT Type: SNVT_press_p 

nciPressNominal 

Valid range: -100 Pa to +100 Pa Deafult value: +15 Pa 

Setpoint value of the room pressure in Pascal. 


nciPressDZoneP 

Valid range: 0 Pa to 20 Pa Deafult value: 5 Pa 

Dead zone pressure control in the positive range in Pascal. 


nciPressDZoneM 

Valid range: 0 Pa to 20 Pa Deafult value: 5 Pa 

Dead zone pressure control in the negative range in Pascal. 


nciPressLimitP 

Valid range: -100 Pa to +100 Pa Deafult value: 0 Pa 

Pressure control limit as an offset to the setpoint value in the positive range in Pascal. 

If the value = 0, the pressure cascade in the positive range is disabled. 


nciPressLimitM 

Valid range: -100 Pa to +100 Pa Deafult value: 0 Pa 

Pressure control limit as an offset to the setpoint value in the negative range in Pascal. 

If the value = 0, the pressure cascade in the negative range is disabled. 


nciPressPercentP 

Valid range: 0 % to 100 % Deafult value: 20 % 

Maximum change value of the pressure cascade for air fl ow in % in the positive range. 


nciPressPercentM 

Valid range: 0 % to 100 % Deafult value: 20 % 

Maximum change value of the pressure cascade for air fl ow in % in the negative range. 


nciPressFlowStep 


Limit value for the maximum change in fl ow rate under the pressure cascade control. 


nciSendOnDltFlow 


Value to the change in the value nvoBoxFlow required before a transmission takes place. 

SNVT Type: SNVT_switch 

nciTempActiv 

Valid range: [(100,0 1), (0,0 0)] Deafult value: (0,0 0) 

State of the independent temperature control, on (100,0 1) or off (0,0 0). The separate temperature controller regulates 

temperature from the predetermined value via an analogue control signal (range 0 V to 10 V) for a heating valve and a 

cooling valve. 






nciSensorTemp 

Valid range: 0 to 1 Default value: 1 

Selects the type of sensor for temperature measurement. 

0 = temperature sensor on the internal temperature input 

1 = 0 V ... 10 V: 0 ° C ... 50 ° C 

SNVT Type: SNVT_temp_p 

nciTemperature 

Valid range: -273,17 °C to +327,66 °C Default value: -- 

This value includes the static setpoint of temperature control. If a dynamic setpoint value is used via the variable nviTemperature, 

set nciTemperature has to be set to 0. 


nciTempOffset 


Offset value for temperature control. 

Depending on the difference (actual - setpoint value), an increase in the amount of air can be carried out. Contains this 

variable a value > 0, then for each 1 ° C difference the amount of air will be increased with this value. 

SNVT Type: SCPTdelayTime 

nciControlTime 

Valid range: 1,0 to 6553,4 sec Default value: 6,0 

This parameter determines the time interval of the control steps in the independent temperature control and in the pressure 

cascade. 


nciControlFactor 

Valid range: 1 to 10 Default value: 4 

Multiplier for the independent temperature control or maximum value for the change per step in the pressure cascade. 


13

p 

p 

p 

p 

p 

p 



LON-volume fl ow controller operating modes 

LON network 

The LON network offers maximum fl exibility 

and safety. The building management 

system enables complete ventilation control 

and monitoring of all volume fl ow controllers 

as well as remote maintenance of 

the entire LabSystem product range. The 

building‘s central computer balances the 

ventilation requirements of the entire building 

and can also check all room pressure 

controllers for plausibility. 

Supply air 

M 

VAV500-L 

Schematic diagram 1: 

Room balance via LON of up to 16 participants 

M 

Fume hood #1 

FC500 

LON 

M 

Fume hood #2 

FC500 

LON 

M 

#3 … #14 Fume hood #15 Exhaust #16 

LON-Network, FTT-10A 

FC500 

LON 

M 

Switchable 

exhaust 


CAV 

Floor exhaust 

Exhaust air 

Room exhaust air 

M 


Room balance in laboratories 

via LON 

Demand-related volume fl ows in laboratories 

change very quickly (< 3 sec) and 

high-speed regulation of room supply and exhaust air is 

essential. The required room negative or positive pressure 

in the laboratory must be maintained safely and and precisely 

at all times. Via the LON network, the SCHNEIDER 

VAV-L variable volume fl ow controller balances up to 16 

connected consumer loads with the appropriate exhaust air 

volume fl ows and calculates the total and the difference to 

a specifi ed value (constant room air exchange rate). Thus 

this product is perfectly suited to room supply air (total) and 

exhaust air (difference) applications in laboratories. 

LON volume flow controller operating modes 

The VAV500-L variable volume fl ow controller with LON 

interface has various operating modes which can be confi - 

gured accordingly via the LON network. The following control 

types are implemented: 

• Variable volume flow controller 

• 2 point constant volume flow controller 

• Balancing volume flow controller 

• Room volume flow differential controller 

Lab room 1 

Variable volume flow controller 

(operating mode 1) 

This description applies similary to the master and/or the 

slave. 

First the necessary confi guration properties are defi ned via 

the LON network. 

The setpoint setting of the volume fl ow that is to be regulated 

is done via the LON variable nviExtFlow[0]. Since summation 

of the different consumer loads (LON nodes) is not 

necessary here, this is the only setpoint setting. The volume 

fl ow actual value is available via the LON variable nvo- 

BoxFlow and the volume fl ow setpoint via the LON variable 

nvoNomFlow and may be used for testing or for master/ 

slave sequential switching. 

Switching on/off via the DDC/BMS is possible with the LON 

variable nviDDCOnOff. 

For further explanations see the detailed SNVT description 

VAV500-L. 

Two independent control circuits with VAV500-L 

controller 

Diagram 2 shows two control circuits independently operating 

(in terms of hardware and software) in a single 

VAV500-L controller, making it possible to implement two 

independent volume fl ow controllers. Operation is possible 

as Master 1 and Slave 1 or as Master 1 and Master 2. This 

can considerably reduce the total system costs, particularly 

for larger construction projects. 


Two independent control circuits master/master or 

master/slave 

Supply air Master 1 Master 2 or Slave 1 

M 

p 


M 


p 

LON functionality 

The LON functions of the VAV-L volume fl ow controller are 

implemented in accordance with the LonMark specifi cation 

8010 „VAV Controller (Variable Air Volume)“. See the SNVT 

list on pages 9 to 13. 

Laboratory / Cleanroom 



p 

p 

p 

p 

p 



2 point constant volume flow controller 



Table 3: Forced control LON-operating mode 2 

This description applies similary to the master and / or the 

slave. 

First the required confi guration properties are defi ned via 

the LON network. 

Switching to 2-point operating mode is done via the LON 

variable nviDDCNormalRedu. The on/off function is also 

possible via the LON variable nviDDCOnOff. The standard 

values of the volume fl ows normal and reduced must 

already have been defi ned via the confi guration properties 

nciFlowNorm and nciFlowRedu. 

Switching can also be done via the digital inputs. The 

relationship is shown in table 3. 

Digital Inputs 

Function In 2 In 3 In4 

V MAX 0 0 0 

V MIN 1 0 0 

V MED 0 1 0 

V NOTFALL or 

damper = SHUT 

0 0 1 

Contact open = 0 (input not under current), contact closed 

= 1 (input under current). 

The digital input In1 has the highest priority and switches 

the fl ow controller VAV500-L ON or OFF. 

Balancing volume flow controller 


This operating mode is particularly suitable for decentralized 

room control applications (e.g. laboratories with FC500 

LON fume hood controllers). 

In principle operating mode 1 applies 

here (variable volume fl ow controller). 


Room balance via LON of up to 16 participants 

Setpoint setting is achieved by automatic 

summation of up to 16 variable standard 

values via the LON network (e.g. 

exhaust air actual values of 16 fume 

hood controllers, such as FC500). 

The LON variables nviExtFlow[0] to 

nviExtFlow[15] are designated for this 

purpose. Channel selection [0 to 15] is 

done via the LON variable nciChannels. 



M 

M 

M 

FC500 

LON 

FC500 

LON 

M 

M 

FC500 

LON 

Switchable 

Exhaust 

Fume hood #1 Fume hood #2 #3 … #14 Fume hood #15 Exhaust #16 


Lab room 2 


CAV 

Floor exhaust 


Constant loads, such as constant 

volume fl ow controllers (CAV) can be 

defi ned with the confi guration property 

nciFixFlowNorm (normal operation) and 

nciFixFlowRedu (reduced operation). 


15

p 

p 

p 

p 

p 




Room volume flow difference controller 


This operating mode is particularly 

suitable for room applications in which 

a constant room air exchange rate is 

required and the room exhaust air is 

generated by variable consumer loads. 

The required confi guration properties 

are fi rst defi ned via the LON network. 

In principle operating mode 3 applies 

here (balancing volume fl ow controller). 

The summated setpoint, consisting 

of the LON variables nviExtFlow[0] to 

nviExtFlow[15] is now subtracted from 

a fixed value (room air exchange rate, 

LON variable nciMaxFlow). The result 

forms the new setpoint with which the 

room exhaust air controller is supplied. 

This ensures a constant room air 

exchange rate, although the consumer 

loads change variably. 


CAV 


Room volume flow difference controller and room balancing 

via LON of up to 16 participants 

M 

Fume hood #1 

FC500 

LON 

M 

Fume hood #2 

Lab room 3 

FC500 

LON 

M 

FC500 

LON 

#3 … #14 Fume hood #15 Exhaust #16 


M 

Switchable 

exhaust 


CAV 

Floor exhaust 


Room exhaust air 

M 


Diagram 5 shows the variable room 

exhaust air depending on the variable 

consumer loads. The total exhaust 

air is the sum of the constant floor 

extraction (fixed values) plus variable 

consumer loads plus variable room 

exhaust air. Since more total exhaust 

air is extracted than constant supply air 

is admitted, laboratory 3 is in a state of 

negative pressure. 

Air volume flow V [m3/h] 

Total exhaust air 

Total supply air 

Variable room exhaust air 

Variable loads 

Constant floor exhaust 

Diagram 5: 

Variable room exhaust air 

t 




Software application ● Programming 

Other applications 

The VAV500-L controller has digital inputs and outputs that 

can be accessed and controlled via the LON network. 

It is also possible to measure the actual value via a suitable 

measuring device (e.g. SCHNEIDER measuring tube or 

Venturi measuring tube). 

Available software application 

The following software application is available: 

- VAV500_V53DT standard application 

This application is delivered with the VAV500-L product as a 

standard factory setting. 

Programming the volume flow controller 

Important standard network variable types 

The VAV500-L volume fl ow controller is programmed for 

security reasons only onsite with the SVM100 or with the 

PC software PC2500. 

Shield factor (C value) 

The shield factor is the geometrically dependent constant of 

the measuring device used (type of measuring device and 

geometric dimensions). 

The following table shows the relationship between volume 

fl ow (minimum and maximum) and the shield factor B (Cvalue). 

Percentage weighting of the total 

Percentage weighting of the total calculated from the external 

actual values 0...15 (nviExtFlow[0...15]) is done via the 

LON variable nciPercentFlow. The differential pressure value 

can be set using the percentage weighting (differential 

pressure value for positive or negative pressure). 

Perform zero-point calibration 

The zero-point calibration of the static differential pressure 

transmitter is performed for security reasons only with the 

SVM100 or with the PC software PC2500. 

Digital inputs and outputs 

The status of the digital inputs can be retrieved with the 

LON variable nvoDigiIn and the relays can be operated with 

the LON variable nviOutput. 

Description of the VAV500-LON functionality 

The defi nition of an LON node requires differentiation between 

the node object (#0) and one or more application objects. 

Both are in turn divided into required (mandatory) and 

optional variables. In addition, there is a set of confi guration 

properties for programming the node. Adhering to these 

conventions ensures interoperability of each LON node. 

For a detailed description, please see the documentation: 

SNVT description VAV500-L. 

Function Meaning Value range 

V MIN 

V MAX 

Shield 

factor B 

(C-value) 

minimum volume 

fl ow 

maximum 

volume fl ow 

measuring device 

constant 

shield factor 

B * 1.5 (rule of thumb) 

shield factor 

B * 16 (rule of thumb) 

10...2000 

Calculation example: 

The shield factor B of the SCHNEIDER maintenance-free 

measuring system (DN250) is B = 94. This results in the 

following volume flows: 

V MIN = 1.5 * 94 ≈ 141 m 3 /h 

V MAX = 16 * 94 ≈ 1504 m 3 /h 

In practice, however, the volume fl ow V MAX = 1504 m 3 /h 

should be reduced to such an extent that a fl ow velocity of 

6 m/s in laboratories is not exceeded (reduced noise level). 


17



Room plan 2 ● Variable volume fl ow controller, LON balancing with router ROU300, independent pressure 

cascade and independent temperature control loop 

Room plan 2 shows the interconnection of up to 16 fume 

hood controllers with the LON network and a router. For 

> 30 LON nodes we recommend installing a subnet with a 

router, which ensures that data exchange takes place at an 

adequate speed. The VAV-L volume fl ow controllers automatically 

balance the required room supply air (total) and 

room exhaust air (difference) and regulate the calculated 

value. The 24V AC supply voltage for the volume fl ow controller 

and the router is provided at the customer site. 

A room by room LON connection to the building management 

system is done via the ROU300 router. 

can be connected to the VAV500-L and thus the actual value 

of 0 (2) ... 10V DC for the pressure cascade control is 

available. 

The temperature control is connected to the exhaust air 

fl ow control VAV500-L and provides the setpoint value 

and actual value as a standard variable (SNVT) via the 

LON network. An independent temperature control loop of 

heating and/or cooling valves (heating/cooling) or via air 

volume shift is implemented and can be easily realized. Of 

course, the temperature control can be taken over by the 

BMS. 

An external static differential pressure sensor (eg, ± 50 Pa) 

FC 

FC 

FC 

Optional: 

Room control panel 

RBG100 

LED – night operation 

Cancel night operation 

Room 

supply air 

dp 

M 


Fume hood #1 

Fume hood #2 

R 

Fume hood #3 

LON-NETWORK, 

FTT-10A 

Cable type: IY(St)Y 4x2x0,8 

Din1 

Dout1 


Room 

exhaust air 

dp 

M 


24V AC 

dP 

External differential 

Pressure sensor 

24V AC 

LON-Router 

ROU300 

Setpoint value 

Temperature 

External 

Temperature sensor 

dR 

dT 

24V AC 

R 

Building management system 


LON-NETWORK, FTT-10A 

Legend: 

FC 

RBG100 


Din1 

Dout1 

dP 

dT 

dR 

ROU300 

R 

24V AC 

Attention! 

= Fume hood controller, fully variable, 

LON, FTT-10A 

= Room control panel for canceling the night 

operation (optional) 

= Fast variable multi-functional air volume flow 

controller, with LON-room balancing option 

= Digital input button „cancel night operation“ 

= Digital output LED-night operation 

= External static differential pressure sensor 

for pressure cascade 

= External temperature sensor for actual value 

temperature control loop 

= Setpoint value temperature control loop 

= Router FTT-10A/FTT-10A 

= Terminal resistor 

= 24V AC for air volume controller VAV500-L and 

Router, provided by customer 

Wires for LON A/B must be twisted pair. 

Don´t exceed max. cable lenght. 




Network cable specifi cation ● LON ● BACnet ● Modbus 

LON-cable specification (FTT-10A) 

To ensure safe transfer in networks with free topology, the 

following points must be observed: 

• A terminator with R1 = 52.5 Ω or an LPT 10-A with integrated 

terminator must always be connected. 

• The distance from each transceiver to all other transceivers 

may not exceed the maximum distance between 

two nodes. 

• In the case of different signal paths, e.g. with ring topology, 

the longest transmission path should be used as a 

basis for observation 

• The maximum cable length is the sum total of all network 

cables connected in the segment. 

• Connect shield on one side of RC to ground 

(R = 470kOhm, ± 5%, 0.25 W, C = fi lm capacitor 

0.1 uF, ± 10%, ≥ 100V). 

• Specifi cation and connection see LonWorks FTT-10A 

free topology Transceiver User‘s Guide by Echelon. 

The mainly used transceiver type in building automation is 

FTT10-A in free topology. If the wiring is with Belden, the 

cable length is limited to a maximum of 500 m. With the type 

of cable JY (St) Y 2 x 2 x 0.8, the maximum cable length is 

limited to 320 meters. Figure 1 illustrates the cable length. 

Figure 1: Cable type JY(St)Y 2 x 2 x 0.8 in free 

topology 

K 

FTT 10-A / LPT 10-A, free topology 

with cable type JY(St)Y 2 x 2 x 0,8 

K 

Maximum distance between any nodes: 

Maximum distance between any nodes and 

busterminator or LPT 10-A: 

Maximum cable length: 

K 

K 

K 

K 

maximum 320 m 

K 

maximum 320 m 

When the recommended cable length is exceeded, a repeater 

or router has to set that causes a physical separation of 

the network and limits the traffi c on the essential information 

(router). 

FTT10-A / LPT10-A in free topology 

Cable types 

Max. 

distance 

from node to 

node 

Max. total 

cable length 

TIA 568A category 5 250 m 450 m 

JY(St)Y 2 x 2 x 0.8 320 m 500 m 

UL Level IV, 22 AWG 400 m 500 m 

Belden 8471 400 m 500 m 

Belden 85102 500 m 500 m 

K 

= Network node 

= Busterminator = 52,5 Ohm 

320 m 

320 m 

500 m 

Attention on use of cable type JY (St) Y: 

Always use the type of cable JY (St) Y 2 x 2 x 0.8 

Do not use the type of cable JY (St)Y 2 x 2 x 0.6 

WARNING! Connect always the twisted pair on 

LON-A and LON-B. 

BACnet-cable specification (MS/TP, RS485) 

In a BACnet network (MS/TP, RS485) wiring is permitted 

only in line topology (no free topology, as with LON). 

MS/TP (Master-Slave/Token-Passing) 

The Master-Slave/Token-Passing protocol was also developed 

by ASHRAE and is only available for BACnet. 

Connection to the fi eld bus is done via the inexpensive EIA 

RS 485 interface. MS/TP can be operated in pure Master/ 

Slave mode, with token passing between equal partners 

(peer to peer token passing method) or with a combination 

of both these methods. 

EIA RS 485-Standard 

The EIA RS 485 standard defi nes a bidirectional bus system 

with up to 32 subscribers. Because several transmitters 

operate over a shared line, a protocol is required to 

ensure that a maximum of one data transmitter is active at 

any time (e.g. MS/TP). All other transmitters must be in a 

state of high impedance during this time. 

In the ISO standard 8482 the cabling topology is standardised 

to a max. length of 500 metres. The subscribers are 

connected to this bus cable in line topology via a max. 5 

metre long stub line. It is generally necessary to terminate 

the cable at both ends with terminating resistors (2 x 120 

ohm) in order to prevent refl ections. 

If no data transfer takes place (data transmitter inactive), 

a defi ned quiescent level should arise on the bus system. 

This is achieved by connecting line B via 1k Ohm to earth 

(pull down) and line A via 1k Ohm to +5V DC (pull up). 

Although intended for large distances in industrial environments, 

where potential shifts cannot be avoided, the EIA 

RS 485 standard does not prescribe galvanic separation. 

However, since the receiver components are sensitive to 

shifts in earth potentials, galvanic separation, as defi ned by 

ISO9549, is recommended for reliable installations. 

During installation it is essential to install the twisted pair 

(A and B) individually. It is also essential to ensure correct 

polarity of the twisted pair, because incorrect polarity can 

result in inversion of the data signals. Particular in the case 

of problems with the installation of new end devices, troubleshooting 

should begin by checking the bus polarity. 

Always install screened cables in line (daisy chain) topology 

and install the screen on one side. 


19




Network extension in bus/line structure 

The bus line is laid in one strand. Connection of the nodes is 

done via short stub lines (maximum 5 m). Always install the 

twisted pair (A and B) individually. It is essential to ensure 

the correct polarity of the bus wires. 

EIA RS 485 in Bus- / Line topology 

(daisy chain) 

To ensure safe transmission in networks with bus/line topology, 

the following points must be observed: 

• The bus tine must be connected to bus terminators at 

both ends R1 = R2 = 120 Ω. 

+5V 

A 

1 k 

1 2 3 

Field 

module 

AB 

Field 

module 

AB 

Field 

module 

AB 

max. 5 m 

• Connect shield to ground on one side. 

• The second terminator is always required. 

• The maximum length of the stub lines must not exceed 

5 m. 

B 

120 

1 k 

GND 

Wires drilled. 

Cable shielded. 

max. 500 m 

AB 

Field 

module 

max. 5 m 

120 

max. 32 

Field modules 

• The maximum cable length is 500 m. 

• A maximum of 32 subscribers may be connected to a 

bus/line structure. 

Maximum distance between busterminator: 

Maximum length of stub line: 

Use always drilled shielded cable. 

Only bus-/ line topology allowed. 

500 m 

5 m 

Figure 2 shows the bus/line topology of the EIA RS 485 

standard with the maximum cable lengths. 

In table 4 various cables suitable for the EIA RS 485 Standard 

are specifi ed. 

Figure 2: 

EIA RS 485 in bus/line topology 

Cable types 

EIA RS 485 in bus- / line topology 

Manufacturer 

Conductor 

diameter 

[mm] 

AWG 

Conductor 

cross-section 

[mm²] 

Rloop Ω/ 

km 

Max. cable length of 

the bus line [m] 

Li2YCYPiMF Lapp 0,80 20,4 0,503 78,4 500 

JY(St)Y 2 x 2 x 0,8 various 0,80 20,4 0,503 73 300 

geschirmt 

9843 paired Belden 24 78,7 500 

FPLTC222-005 Northwire 22 52,8 400 

EIB-YSTY various 1,0 0,80 31,2 500 

Table 4: 

Cable specifi cation of different 

cable types 

All cables must be shielded and the shield is placed on 

ground (GND). 





Modbus-cable specification (RS485) 

Modbus is an application protocol developed in 1979 by 

Gould-Modicon for exchanging messages between fi eld 

modules with integrated Modbus controllers. 

The Modbus protocol is located on the application layer of 

the OSI reference model and supports master/slave operation 

between intelligent devices. 

The Modbus protocol defines the message type via which 

the Modbus controllers communicate with one another. It 

describes how a Modbus controller establishes access to 

another controller via a query, how this query is answered, 

and how errors are recognised and documented. 

The Modbus protocol works on a query-response basis 

and offers various services, which are specifi ed by function 

codes. During communication, the Modbus protocol determines 

how each controller learns the device address and 

recognises messages that are intended for it. In addition, it 

determines which actions are to be carried out and which information 

the Modbus controller can extract from the fl ow of 

messages. When a response is required, this is assembled 

in the controller and sent to the corresponding station with 

the Modbus protocol. 

The implementation of Modbus via EIA RS 485 is inexpensive 

and is therefore suitable for internal laboratory network 

connections. When laying the cables, it is essential to adhere 

to the standards described in the EIA RS 485 standard. 

SCHNEIDER products in network systems 

Because fi eld bus modules for LON, BACnet and Modbus 

can be retrofi tted at any time, the entire system is very fl exible 

and can be cost-effectively adapted to various networks. 

We offer the entire system from a single source, without 

compatibility problems. 

For detailed cable specifi cation refer to LabSystem handbook 

from SCHNEIDER, chapter 10.0. 


21



Installation notes 


volume flow controller, circular model 


volume flow controller, rectangular model 

Distance to one-quarter pipe 

Distance to one-quarter pipe 

min. 1xD 

min. 1xDiag. 

Distance to other fitting pieces 

(e.g. T-piece, branch, reducer, etc.) 

Distance to other fitting pieces 

(e.g. T-piece, branch, reducer, etc.) 

min. 2xD 

min. 2xDiag. 

Distance to fire damper 

Distance to fire damper 

min. 2xD 

min. 2xDiag. 

Distance to silencer 

Distance to silencer 

min. 2xD 

min. 2xDiag. 

D = diameter 

W x H = width x height 

Diag. = Diagonal 




Terminal diagram: variable air volume controller VAV500-A 

Heating and 

A3-Out 

Analogue setpoint value 

Analogue input 0(2)...10V DC an A8-In 

Function 

Set value via A8-In 

VMIN 

VMED 

VEMERGENCY 

CONNECTING 

VOLTAGE 

230 VAC 

50/60Hz 

L 

N 

Cooling 

A4-Out 

Heating or Cooling 

A4-Out 

A4-Out 

Digital inputs direct forced control (In2, In3, In4) 

In2 

0 

1 

0 

0 

Controller configuration 

F2 

3,15 AT 

F1 

X1 

1 2 3 

X2 4 5 6 

250 mAT 

Relay 

K1 

K1 

Digital setpoint value 

Keino analogue input, only digital 

forced control 

In3 In4 In2 In3 In4 

0 

0 

1 

0 

0 

0 

0 

1 

0 

1 

0 

0 

0 

0 

1 

0 

0 

0 

0 

1 

Prim.: 

Sek : 


Transformer 

28,6 VA 

230 VA 

22 VAC/1,25A 

X7 

19 20 21 22 23 24 

X8 

Relay 

On/Off 

Function 

VMAX 

VMIN 

VMED 

Run 

VEMERGENCY 

Relay 

Day/Night 

K2 K3 K4 

7 8 9 

X3 X4 X5 X6 

12 

11 

10 

9 

8 

7 

6 

5 

4 

3 

2 

1 

JP3 

Relay 

Fault alarm 

10 11 12 13 14 15 16 17 18 

74 76 78 80 82 84 86 88 90 92 94 96 98 100102104 

75 77 79 81 83 85 87 89 91 93 95 97 99 101103105 

In8 

In7 

In6 

In5 

RAM500 

In4 

In3 

In2 

In1 

DIGITAL INPUTS 

In1...In8 


Reset 

Run 

Run 

X9 

25 26 

- + 

Accu 

backup 

X30 

GND 

Actual value 1, 0(2)...10V DC A1-In 

GND 

Actual value 2, 0(2)...10V DC 

A2-In 

GND 


GND 


A4-In 

GND 



GND 

A6-In 

GND 


Setpoint value 4, 0(2)...10V DC 

GND 

A8-In 

ANALOGUE INPUTS 

A1In...A8In 

0(2)...10V DC/1mA 

X10 

JP5 

1 2 3 4 5 

CPU 

27 28 

B1 

LON 

1.1 

1.2 

2.1 

2.2 

3.1 

3.2 

4.1 

4.2 

In1 

JP1 

In2 

In3 

In4 

X11 

X21 

X30 

FC500 

74 76 78 80 82 84 86 88 90 92 94 96 98 

X20 

RAM500 

X19 

JP6 

100102104 

75 77 79 81 83 85 87 89 91 93 95 97 99 101103105 

Legend RAM500: 

1. RAM500 is developed as low cost balance for 

laboratory rooms with mit max. 7 fume hoods 

(A1-In to A7-In). 

2. Connect the analogue setpoint value 0(2)...10V DC 

for the VAV500 to the analoge input A8-In of the 

room control module RAM500. 

3. The analoge inputs A1In...A7In of the RAM500 can 

be grouped to max 2 groups. Group 1 should be 

connected to analogue output A1-Out and group 2 to 

analogue output A2-Out of the VAV500 controller. 

The analogue outputs A1-Out and A2-Out of 

the VAV500 controller with the plugged-in 

RAM module RAM500 are reserved for the setpoint 

values of the external supply VAV´s (max. 2). You 

can parametrise supply VAV´s as well as supply 

VAV and exhaust VAV. 

4. The internal analogue value of the VAV500 controller 

with the plugged-in RAM module RAM500 is 

internally connected to A10-In. The own actual 

exhaust air value doesn´t occupy an analogue 

input and has to be considered for the room balance 

parametrizing. 

69 70 71 72 73 

X14 

RS485-1 RS485-2 

X18 

X17 

FAZ 2 

X16 

X13 

FAZ 1 

29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 

61 62 63 64 65 66 67 68 

30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 

JP8 

1 2 

X12 

STATIC DIFFERENTIAL PRESSURE 

TRANSMITTER Range: Messbreich: 

3...300 6...300 Pa Pa 

+ 

- 

+ = overpressure 

- = underpressure 

JP2 

2 1 

X15 

19 20 21 22 23 24 

X8 

10...20 VA 

max. 10 VA 

L N L N 

IN OUT 

24V AC 

EXTERNAL 

VOLTAGE 

69 70 71 72 73 

X14 

GND 

0(2)...10V DC 

+24V DC 

Setpoit value temperature 

or 

Actual value pressure sensor 

B1 

In1 

NO 

NC 

COM 

ON 

OFF 

ON/OFF 

Relaiy contact 

Max.: 3A / 230VAC 

NO 

NC 

COM 

NIGHT 

DAY 

DAY/NIGHT 

Relaiy contact 

Max.: 3A / 230VAC 

NO 

NC 

COM 

OPERATION 


external voltage 

24VDC/50mA 

X11 

FAULT 

FAULT ALARM 

Relaisy contact 

Max.: 3A / 230VAC 

29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 

30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 

- - 

+ + 

24V 24V 

DC DC 

On/Off 

JP1 

1.1 

1.2 

2.1 

2.2 

3.1 

3.2 

4.1 

4.2 

In2 

In3 

- 

+ 

24V 

DC 

Day/Night 

Night-enable 

In4 

- 

+ 

24V 

DC 

In1 

In2 

In3 

In4 

Override/VMax 

In1, In2, In3, In4 

Jumper not connected 

external voltage 

24VDC/50mA 

maximum cable lenght 

< 1000m 

ACCUMULATOR 

12V/1,2Ah 

A 

B 

A 

B 

LON A/B-IN 

LON A/B-OUT 

Sash =0cm 

Sash >50cm 

On/Off 

LON-NETWORK 

FTT-10A (optional) 


Max. cable length



Order code: 

Fast multi-functional variable air volume controller 


- L 

- 

T 

- 

0 

Type 

Setpoint value / Controller / Field bus module 

Analogue 0(2)...10V DC, with room balancing (7 analogueinputs) 

or digital via contacts (1-3 point) 

LON, with room balancing (max. 16 consumer) 

BACnet, MS/TP, RS485, with room balancing (max. 32 consumer) 

BACnet, TCP/IP, Ethernet, with room balancing 

Modbus, RS485, with room balancing (max. 32 consumer) 

A 

L 

BM 

BI 

M 

Pressure cascade (optional) 

0 without 

1 with external sensor 0...100 Pa 

2 with external sensor ± 50 Pa 

Transformer 230V/24V AC/28,6 VA 

0 without internal transformer (power 24V 

AC/25VA provided by customer) 

T with internal transformer 230V/24V 

Ordering example: Fast multi-functional variable air volume controller 

Fast multi-functional variable air volume controller, setpoint value via LON, with LON 

fi eld bus module and room balancing (max. 16 users) and internal sensor (3 .. 300 

Pa) for air volume control, internal transformer 230V/24V AC, 28.6 VA, without additional 

pressure cascade. 

Make: SCHNEIDER 

Type: VAV500-L-T-0 

Important: 

Order the damper with actuator 

and measuring device 

as well. Please indicate air 

values VMIN, VMAX and 

VKONST and mode of analogue 

control 0...10V DC or 

2...10V DC. 

Order code: 

Damper with measuring system and actuator, circular model 

Measuring system 

Maintenance-free measuring device 

Venturi nozzle 

Measuring nozzle 

Mesasuring cross with orifi ce ring 

Mesasuring cross without orifi ce ring 

MD - 250 - P - 0 - 0 - 0 - MM - 

MD 

VD 

DD 

KD 

SD 

1 

Actuator type 

1 SCHNEIDER standard 12V, 3 s for 90° 

2 Analogue linear drive 24V, 5 s for 90° 

3 Spring forced actuator 24V, 30 s for 90° 

Ex Ex-proofed actuator 24V, 20sec for 90° 

damper nominal diameter DN [mm] 

100, 110, 125, 160 

200, 225, 250, 280 

315, 355, 400 

Material 

Polypropylene (PPs) 

PPs-el (electrically conductive) 

Polyvinyl chloride (PVC) 

Galvanized steel 

Stainless steel 1.4301 (V2A) 

100 

... 

400 

P 

Pel 

PV 

S 

V 

Damper blade seal 

with damper blade seal = K without = 0 

MM 

MF 

FM 

FF 

RR 

Pipe connections inflow / outflow 

socket / socket (only PPs and PPs-el) 

socket / fl ange (only PPs and PPs-el) 

fl ange / socket (only PPs and PPs-el) 

fl ange / fl ange (PPs, PPs-el, steel, stainless steel) 

pipe / pipe (only steel and stainless steel) 

Insulation shell 

0 = without D = with insulation shell 

Rubber lip seal (galvanized and 

stainless steel V2A only) 

0 = without G = with rubber lip seal 

Ordering example: Damper with measuring system and actuator, circular model, PPs 

Maintenance-free measuring system with damper, DN250, PPs, without damper blade seal, 

without rubber lip seal, without insulation shell, socket/socket, high-speed actuator 3 s for 90 

° (Fast Direct Drive SCHNEIDER). 


Type: MD-250-P-0-0-0-MM-1 

Important: 

Order the Variable 

air volume controller 

VAV500 as well. 

Material 

Versions 

Available diameter 


Polypropylene (PPs) P MD, VD 110, 160, 200, 225, 250, 280 315, 355, 400 

PPs-el (electrically conductant) Pel MD, VD 110, 160, 200, 225, 250, 280 315, 355, 400 

Polyvinyl chloride (PVC) PV MD, VD 110, 160, 200, 225, 250, 280 315, 355, 400 

Galvanized steel S DD, KD, SD 100, 125, 160, 200, 225, 250, 280 315, 355, 400 

Stainless steel 1.4301 (V2A) V MD, DD, KD, SD 100, 125, 160, 200, 225, 250, 280 315, 355, 400 




Order code: 

Damper with measuring system and actuator, rectangular model 

DD - 600 - 400 - S 

- 

0 

- 

0 

- 

1 


Maintenance-free measuring device 

Measuring nozzle 

Mesasuring cross with orifi ce ring 

Mesasuring cross without orifi ce ring 

Nominal width B [mm] 

200, 300, 400, 500, 600 

700, 800, 900, 1000, 1200 

Nominal height H [mm] 

100, 160, 200 

250, 300, 400 

MD 

DD 

KD 

SD 

200 

... 

1000 

100 

... 

400 

Actuator type 

1 SCHNEIDER standard 12V, 3 s for 90° 

2 Analogue linear drive 24V, 5 s for 90° 

3 Spring forced actuator 24V, 30 s for 90° 

Ex Ex-proofed actuator 24V, 20sec for 90° 

Insulation shell 

0 = without D = with insulation shell 

Damper blade seal 

0 = without K = with damper blade seal 

Material 

Polypropylene (PPs) 

PPs-el (electrically conductive) 

Polyvinyl chloride (PVC) 

Galvanized steel 

Stainless steel 1.4301 (V2A) 

P 

Pel 

PV 

S 

V 

Ordering example: Damper with measuring nozzle and actuator, rectangular model, 

galvanized steel 

Measuring nozzle with damper, width = 600, height = 400 mm, galvanized steel, without 

damper blade seal, without insulation shell, fl ange / fl ange (standard), high-speed actuator 

3 s for 90 ° (Fast Direct Drive SCHNEIDER). 


Type: DD-600-400-S-0-0-1 

Important: 

Order the variable 

air volume controller 

VAV500 as well. 

Material 

Versions 


Available width 

B [mm] 

Available height 

H [mm] 

Polypropylene (PPs) P MD 200...1000 100...400 

PPs-el (electrically conductive) Pel MD 200...1000 100...400 

Polyvinyl chloride (PVC) PV MD 200...1000 100...400 

Galvanized steel S DD, KD, SD 200...1000 100...400 

Stainless steel 1.4301 (V2A) V MD, DD, KD, SD 200...1000 100...400 

Note: 

Order air Flow controller VAV500 and measuring system (MD, VD, DD, or KD) always separately. 

MD-250-P-0-0-0-MM-1 

VAV500-L-T-0 

DD-600-400-S-0-0-1 

VAV500-L-T-0 


25



Dimensions ● Volume fl ow ranges, circular model ● PPs, PPs-el, PVC 

Variable air volume controller with damper Material: 

and integrated maintenance-free measuring 

system, cirular model 

Measuring 

system: 

• high control accuracy and response sensitivity 

• insensitive even in adverse fl ow 

• static differential pressure sensor 3...300 Pa 

For the laboratory exhaust air (VAV in PPs, PPs-el and 

PVC version) SCHNEIDER´s patented measuring system 

MD offers the best cost-performance-ratio and comes as a 

standard. 

The fl ow rate control range VMIN, VMAX and VNOM is different 

for each measuring system. Therefore the volume fl ow 

rates for each nominal diameter are listed for the specifi c 

measuring device. 

PPs, PPs-el, PVC 

MD (maintenance-free measuring system), 

standard 

• Measuring system with integrated ring chamber 

• maintenance-free and self-cleaning 

• Option: tightly closing damper according with DIN 

MD-250-P-0-0-0-MM-1 

VAV500-X-X-X 

Nominal 

Ø 

NW 

[mm] 

Inner 

Ø 

D 

[mm] 

Volume flow VMIN, VMAX, VNOM 

at flow velocity v 

Measuring system MD (standard) 

v ≈ 1 m/s 

VMIN 

[m 3 /h] 

v = 6 m/s 

VMAX 

[m 3 /h] 

v ≈ 10m/s 

VNOM 

[m 3 /h] 

B 

[mm] 

Overall length 

L1 

[mm] 

L 

[mm] 

Outer 

Ø 

D1[mm] 

Flange dimensions 

K 

[mm] 

d 

[mm] 

110 111 28 205 277 300 40 220 170 150 7 4 

125 126 36 265 364 300 40 220 185 165 7 8 

160 161 59 434 589 340 40 260 230 200 7 8 

200 201 100 679 1005 350 50 250 270 240 7 8 

250 251 163 1060 1628 400 50 300 320 290 7 12 

315 316 267 1683 2667 490 50 390 395 350 9 12 

400 401 435 2714 4347 580 50 480 480 445 9 16 

Hole 

Version: MD-XXX-P-MM-1 (Socket / Socket) 

Version: MD-XXX-P-FF-1 (Flange / Flange) 

Ring chamber 1 with 

measuring drills d=3,0mm 



Air direction 

Air direction 

L1 

Built-in length = L 

Overall length = B 

L1 

Overall length = built in length = B 

Ring chamber 2 both sides with 


Ring chamber 2 both sides with 


Damper 90° shifted arranged 

to the measuring tube 

Damper 90° shifted arranged 

to the measuring tube 

Recommended volume flow VMAX at a flow velocity v = 6m/s. 

Planning notes for the air volume range VMIN, VMAX and VNOM see page 28. 


d 



Dimensions ● Volume fl ow ranges, circular model ● PPs, PPs-el, PVC 

Variable air volume controller with damper 

and integrated maintenance-free venturi 

nozzle, cirular model 




Material: 

Measuring 

system: 

For the laboratory exhaust air (VAV in PPs, PPs-el and PVC 

version) SCHNEIDER offers in addition to the patented 

measuring system MD the Venturi nozzle VD (extra charge). 






VD (maintenence-free venturi nozzle), extra charge 

• Venturi nozzle with integrated ring chamber 


• Option: tightly closing damper according with DIN 

VD-250-P-0-0-0-MM-1 


Nominal 

Ø 

NW 

[mm] 

Inner 

Ø 

D 

[mm] 



Venturi nozzle VD 

v ≈ 1 m/s 

VMIN 

[m 3 /h] 

v = 6 m/s 

VMAX 

[m 3 /h] 

v ≈ 10m/s 

VNENN 

[m 3 /h] 

B 

[mm] 


L1 

[mm] 

L 

[mm] 

Outer 

Ø 

D1[mm] 

Flange dimensions 

K 

[mm] 

d 

[mm] 

110 111 33 205 329 300 40 220 170 150 7 4 

125 126 45 265 450 300 40 220 185 165 7 8 

160 161 69 434 693 340 40 260 230 200 7 8 

200 201 106 679 1057 350 50 250 270 240 7 8 

250 251 159 1060 1593 400 50 300 320 290 7 12 

315 316 279 1683 2789 490 50 390 395 350 9 12 

400 401 449 2714 4486 580 50 480 480 445 9 16 

Hole 

Version: VD-XXX-P-MM-1 (Socket / Socket) 

Version: VD-XXX-P-FF-1 (Flange / Flange) 


measuring drills d = 3,0mm 







Air direction 

D 

Air direction 

D 

D1 

L1 


L1 


Overall length = built in length = B 

K 




27



Dimensions ● Volume fl ow ranges, circular model ● Galvanized steel, stainless steel 1.4301 


and integrated measuring nozzle, cirular 

model 



• fast and stable air volume control (< 2 s) 

Material: 

Measuring 

system: 

For room supply air (VAV in steel version) the measuring 

nozzle DD (standard version) or alternatively the measuring 

cross with (KD) or without additional orifi ce ring (SD) 

is delivered. 





Galvanized steel, stainless steel 1.4301 (V2A) 

DD (Measuring nozzle), standard 


• Measuring nozzle with integrated ring chamber 

• with damper blade seal 

DD-250-S-0-0-0-MM-1 


Nominal 

Ø 



Measuring nozzle DD (standard) 


NW 

[mm] 

v ≈ 1 m/s 

VMIN 

[m 3 /h] 

v = 6 m/s 

VMAX 

[m 3 /h] 

v ≈ 10m/s 

VNENN 

[m 3 /h] 

B 

[mm] 

L1 

[mm] 

L 

[mm] 

100 28 160 277 378 40 298 

125 45 253 450 378 40 298 

160 76 418 762 388 40 308 

200 123 658 1230 408 40 328 

225 156 836 1559 433 40 353 

250 208 1035 2078 443 60 363 

280 236 1302 2356 513 60 393 

315 294 1651 2944 543 60 423 

355 381 210 3811 613 60 493 

400 469 2674 4694 673 60 553 

300 

250 

Actuator 

NMQ-12 

Actuator NMQ-12 

100 

100 

7 

Damper 

Controller VAV500 

Controller 


Damper 

Air direction 

Pressure 

nibbles 

- 

+ 

100 

L1 

Measuring 

nozzle 


L1 

NW 


Planning note for determination of air volume flow: 

Observe the volume flow in relation to the flow velocity v 

V MIN = Volume flow at a flow velocity v = 1 to 2 m/s 

V MAX = Volume flow at a flow velocity v = 6 m/s (recommended maximun air velocity speed) 

= Volume flow at a flow velocity v = 10 bis 12 m/s 

V NOM 

For laboratory applications (exhaust and supply air) the air velocity speed v = 6 m/s at V MAX should not be exceeded 

due to the noise levels. If this value is exceeded the sound pressure level of < 52 dB(A) stipulated by 

DIN1946, Part 7 can only be achieved with very extensive noise absorption. The maximum volume flow V MAX that 

is to be regulated should therefore always be less than 30 to 40% below V NOM . 




Dimensions ● Volume flow ranges, circular model ● Galvanized steel, stainless steel 1.4301 

Variable air volume controller with damper Material: Galvanized steel, stainless steel 1.4301 (V2A) 

and integrated measuring cross or optional 

Measuring KD (Measuring cross with additional orifice ring) 

maitenance-free measuring system (stainless 

steel only), cirular model 

system: SD (Measuring cross without orifice ring) 

MD (maintenance-free measuring system), stainless 

steel only 



• ensure adequate fl ow distance (≥ 1 * D) 


• Measuring cross with additional orifi ce ring (optional) 

• with damper blade seal 


cross with (KD) or without additional orifi ce ring (SD) or optional 

the measuring nozzle (DD = standard version) is delivered. 

The patented measuring device MD from SCHNEI- 

DER is only in PPs, PPs-el or stainless steel available. 





KD-250-S-0-0-0-MM-1 


Nominal 

Ø 

Volume flow VMIN, VMAX, VNOM for different masuring systems 

KD, SD, MD at flow velocity v 

Measuring cross with 

additional orifice ring 

KD (standard) 

v ≈ 

1 m/s 

VMIN 

[m 3 /h] 

v = 

6 m/s 

VMAX 

[m 3 /h] 

v ≈ 

10 m/s 

VNENN 

[m 3 /h] 

Measuring cross without 

orifice ring 

SD 

v ≈ 

1 m/s 

VMIN 

[m 3 /h] 

v = 

6 m/s 

VMAX 

[m 3 /h] 

v ≈ 

10 m/s 

VNENN 

[m 3 /h] 

Maintenance-free 

measuring system MD 

(stainless steel only V2A) 

v ≈ 

1 m/s 

VMIN 

[m 3 /h] 

v = 

6 m/s 

v ≈ 

10 m/s 


NW 

[mm] 

VMAX VNENN 

B 

[mm] 

L1 

[mm] 

L 

[mm] 

[m 3 /h] [m 3 /h] 

100 19 160 191 36 160 364 28 205 277 340 28 284 

125 33 253 329 68 253 675 36 265 364 360 28 304 

160 54 418 537 123 418 1230 59 434 589 410 28 354 

200 95 658 953 189 658 1888 100 679 1005 450 28 394 

225 128 836 1282 250 836 2500 130 850 1300 475 28 419 

250 161 1035 1611 308 1035 3083 163 1060 1628 500 28 444 

280 229 1302 2286 393 1302 3932 208 1330 2078 550 28 494 

315 296 1651 2962 485 1651 4850 267 1683 2667 600 28 544 

355 390 2102 3897 675 2102 6755 345 2138 3447 650 28 594 

400 553 2674 5525 824 2674 8141 435 2714 4347 700 28 644 

300 

250 

Actuator 

NMQ-12 

Actuator NMQ-12 

100 

100 

12 

Damper 

Controller VAV500 

Controller 


Damper 

Air direction 

Pressure 

nibbles 

- 

+ 

100 

L1 

Measuring 

cross 


L1 

NW 





29



Dimensions ● Volume fl ow ranges, rectangular model ● PPs, PPs-el, PVC ● non air tight version 

Variable air volume controller with damper Material: 


Measuring 

system, rectangle model, non air tight 

system: 





MD (maintenance-free measuring system), standard 

in PPs, PPs-el, PVC 







standard. 

Width 

B 

[mm] 


MD-400-300-P-0-0-1 

Volume flow VMIN (at v = 2 m/sec), Range 

VMAX (at v = 6 m/s), VNOM (at v = 12 m/sec) 

Height H [mm] 

[m3/h] 

Damper 

Actuator 

Measuring 

device 

+ - 

Air direction 

Controller 

- 

Pressure 

+ 

nibble 

400 

Damper 

ca. 60 

ca. 100 

- - 10800 12960 15120 17280 V NENN 

35 

B 

150 200 250 300 350 400 

216 288 360 432 504 576 V MIN 

200 648 864 1080 1296 1512 1728 V MAX 

1296 1728 2160 2592 3024 3456 V NENN 

324 432 540 648 756 864 V MIN 

300 972 1296 1620 1944 2268 2592 V MAX 

1944 2592 3240 3888 4536 5184 V NENN 

432 576 720 864 1008 1152 V MIN 

400 1296 1728 2160 2592 3024 3456 V MAX 

2592 3456 4320 5184 6048 6912 V NENN 

540 720 900 1080 1260 1440 V MIN 

500 1620 2160 2700 3240 3780 4320 V MAX 

3240 4320 5400 6480 7560 8640 V NENN 

648 864 1080 1296 1512 1728 V MIN 

600 1944 2592 3240 3888 4536 5184 V MAX 

3888 5184 6480 7776 9072 10368 V NENN 

756 1008 1260 1512 1764 2016 V MIN 

700 2268 3024 3780 4536 5292 6048 V MAX 

4536 6048 7560 9072 10584 12096 V NENN 

- 1152 1440 1728 2016 2304 V MIN 

800 - 3456 4320 5184 6048 6912 V MAX 

- 6912 8640 10368 12096 13824 V NENN 

- - 1620 1944 2268 2592 V MIN 

900 - - 4860 5832 6804 7776 V MAX 

- - 9720 11664 13608 15552 V NENN 

- - 1800 2160 2520 2880 V MIN 

1000 - - 5400 6480 7560 8640 V MAX 

Actuator 

Controller 

35 

H 

Intermediate sizes on request. 






Dimensions ● Volume fl ow ranges, rectangular model ● PPs, PPs-el, PVC ● air tight version 



system, rectangle model, air tight acc. to 

DIN 1946, Sec. 4 




Material: 

Measuring 

system: 


MD (maintenance-free measuring system), standard 

in PPs, PPs-el, PVC 







standard. 


The air-tight version is only available in the following 

special dimensions (different heights H compared with 

- - 22026 29082 36139 V NENN 

the non-air tight version (see page 30)). 

MD-400-360-P-K-0-1 

Width Volume flow VMIN (at v = 2 m/sec), Range 

VMAX (at v = 6 m/s), 

VNOM (at v = 12 m/sec) 

Height H [mm] 

B 

195 360 525 690 855 

[mm] 

[m3/h] 

253 479 705 - - V MIN 

Damper 

200 759 1436 2114 - - V MAX 

Actuator 

Measuring 

1518 2873 4227 - - V NENN 

device 

386 731 1075 1420 1764 V MIN 

300 1159 2192 3226 4260 5293 V MAX 

+ - 

Air direction 

2318 4385 6452 8519 10586 V NENN 

519 983 1446 1909 2373 V MIN 

400 1558 2948 4338 5728 7118 V MAX 

Controller 

- 

3117 5897 8677 11457 14237 V NENN 

Pressure 

+ 

nibble 

653 1235 1817 2399 2981 V MIN 

500 1958 3704 5451 7197 8943 V MAX 

400 

3916 7409 10902 14394 17887 V NENN 

786 1487 2188 2889 3590 V MIN 

600 2358 4460 6563 8666 10796 V MAX 

Damper 

4715 8921 13126 17332 21537 V NENN 

- 1739 2559 3378 4198 V MIN 

ca. 60 

700 - 5216 7676 10135 12594 V MAX 

- 10433 15351 20269 25188 V NENN 

- 1991 2929 3868 4806 V MIN 

800 - 5972 8788 11604 14419 V MAX 

- 11945 17576 23207 28838 V NENN 

- - 3300 4357 5415 V MIN 

900 - - 9900 13072 16244 V MAX 

- - 19801 26145 32489 V NENN 

- - 3671 4847 6023 V MIN 

1000 - - 11013 14541 18069 V MAX 

ca. 100 

35 

B 

Actuator 

Controller 

35 

H 





31



Dimensions ● Volume fl ow ranges, rectangular model ● Galvanized steel, stainless steel 1.4301 


and integrated measuring system, rectangle 

model 




Material: 

Measuring 

system: 

Galvanized steel, stainless steel 1.4301 (V2A) 

MD (maintenance-free measuring system), stainless 

steel only 

DD (Measuring nozzle. standard in galvanized steel 

KD (Measuring cross with additional orifice ring) 

SD (Measuring cross without orifice ring) 


• Maintenance-free measuring system (MD) in 

stainless steel 1.4301 only 

• Measuring nozzle (DD) in galvanized steel and 

stainless steel 1.4301 


nozzle DD (standard version) or alternatively the measuring 

cross with (KD) or without additional orifi ce ring (SD) 

is delivered. 

For the laboratory exhaust air (VAV in stainless steel version 

only) SCHNEIDER´s patented measuring system MD offers 

the best cost-performance-ratio and comes as a standard. 

Width 

B 

[mm] 


DD-600-400-S-0-0-1 

Volume flow VMIN (at v = 2 m/sec), 

Range 

VMAX (at v = 6 m/s), VNOM (at v = 12 m/sec) 

Height H [mm] 

[m3/h] 

Damper 

Controller 

Pressure 

nibble 

- 

Air direction 

+ 

Actuator 

Measuring 

cross 

400 

Damper 

- - - 10800 12960 15120 17280 V NENN 

35 

105 

B 

100 150 200 250 300 350 400 

144 216 288 360 432 504 576 V MIN 

200 432 648 864 1080 1296 1512 1728 V MAX 

864 1296 1728 2160 2592 3024 3456 V NENN 

216 324 432 540 648 756 864 V MIN 

300 648 972 1296 1620 1944 2268 2592 V MAX 

1296 1944 2592 3240 3888 4536 5184 V NENN 

288 432 576 720 864 1008 1152 V MIN 

400 864 1296 1728 2160 2592 3024 3456 V MAX 

1728 2592 3456 4320 5184 6048 6912 V NENN 

360 540 720 900 1080 1260 1440 V MIN 

500 1080 1620 2160 2700 3240 3780 4320 V MAX 

2160 3240 4320 5400 6480 7560 8640 V NENN 

432 648 864 1080 1296 1512 1728 V MIN 

600 1296 1944 2592 3240 3888 4536 5184 V MAX 

2592 3888 5184 6480 7776 9072 10368 V NENN 

504 756 1008 1260 1512 1764 2016 V MIN 

700 1512 2268 3024 3780 4536 5292 6048 V MAX 

3024 4536 6048 7560 9072 10584 12096 V NENN 

- - 1152 1440 1728 2016 2304 V MIN 

800 - - 3456 4320 5184 6048 6912 V MAX 

- - 6912 8640 10368 12096 13824 V NENN 

- - - 1620 1944 2268 2592 V MIN 

900 - - - 4860 5832 6804 7776 V MAX 

- - - 9720 11664 13608 15552 V NENN 

- - - 1800 2160 2520 2880 V MIN 

1000 - - - 5400 6480 7560 8640 V MAX 

Controller 


Actuator 

NMQ-12 

35 

H 





Table 5: Flow noise 



Noise levels ● PPs -VAV with integrated maintenance-free measuring system, circular model 

Nominal diameter in mm 

v in m/s 

V in m3/h 

63 HZ 

125 Hz 

∆p g = 100 pa ∆p g = 250 pa ∆p g = 500 pa 

L W in dB/octave 



f m in Hz f m in Hz f m in Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

8000 Hz 

LWA in dB(A) 

L in dB(A) 

63 HZ 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

8000 Hz 

LWA in dB(A) 

L in dB(A) 

63 HZ 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

8000 Hz 

LWA in dB(A) 

L in dB(A) 

160 

200 

250 

315 

400 

2 148 50 47 44 46 45 46 33 22 50 42 53 54 53 53 51 50 56 42 60 52 56 58 55 60 59 57 58 54 65 57 

4 290 55 51 48 51 47 42 35 27 52 44 64 61 58 57 55 53 49 43 60 52 67 67 64 63 60 58 60 58 67 59 

6 434 62 58 53 56 50 46 41 35 56 48 67 65 61 61 58 54 50 45 63 55 72 72 69 67 63 60 59 57 69 61 

8 579 62 60 57 59 55 51 49 45 61 53 71 67 64 64 60 56 53 48 66 58 75 73 71 69 65 62 59 56 71 63 

10 724 67 66 62 58 59 55 54 51 64 56 73 70 66 68 62 59 55 51 69 61 76 76 72 72 67 64 61 58 73 65 

2 226 47 50 47 47 47 46 49 39 54 46 50 53 52 56 57 58 57 59 65 57 55 57 54 59 63 67 67 66 73 65 

4 452 56 57 53 51 53 60 56 42 63 55 59 62 60 60 59 59 60 62 67 59 61 64 64 66 66 67 66 66 73 65 

6 679 59 61 56 55 58 58 52 45 63 55 65 66 64 63 63 63 63 64 70 62 68 70 70 70 69 69 67 70 76 68 

8 905 61 64 60 57 59 58 52 46 64 56 69 72 67 66 67 68 66 61 73 65 70 74 72 73 72 71 69 69 78 70 

10 1131 63 65 62 59 62 60 55 50 66 58 74 72 70 68 69 69 65 61 75 67 75 77 74 74 74 73 71 70 80 72 

2 353 50 47 44 46 45 46 33 22 50 42 53 54 53 53 51 50 56 42 60 52 56 58 55 60 59 57 58 54 65 57 

4 707 55 51 48 51 47 42 35 27 52 44 64 61 58 57 55 53 49 43 60 52 67 67 64 63 60 58 60 58 67 59 

6 1060 62 58 53 56 50 46 41 35 56 48 67 65 61 61 58 54 50 45 63 55 72 72 69 67 63 60 59 57 69 61 

8 1414 62 60 57 59 55 51 49 45 61 53 71 67 64 64 60 56 53 48 66 58 75 73 71 69 65 62 59 56 71 63 

10 1767 67 66 62 58 59 55 54 51 64 56 73 70 66 68 62 59 55 51 69 61 76 76 72 72 67 64 61 58 73 65 

2 561 42 47 45 43 38 35 33 32 45 37 47 47 49 51 54 52 50 50 57 49 52 52 54 56 59 57 55 55 62 54 

4 1122 52 55 50 49 43 38 31 29 50 42 60 61 57 55 55 51 47 48 59 51 65 66 62 60 60 56 52 53 64 56 

6 1683 54 57 52 51 45 40 33 31 52 44 62 63 59 57 57 53 49 50 61 53 67 68 64 62 62 58 54 55 66 58 

8 2244 59 57 56 55 47 43 38 33 55 47 67 68 64 61 58 55 51 50 64 58 72 73 69 66 63 60 56 55 69 61 

10 2806 61 59 58 57 49 45 40 35 57 49 69 70 66 63 60 57 53 52 66 58 74 75 71 68 65 62 58 57 71 63 

2 905 41 48 47 44 38 36 34 32 46 38 48 49 49 50 53 50 48 48 57 49 53 54 54 55 58 55 53 53 62 54 

4 1810 53 54 53 52 46 40 34 30 52 44 62 62 59 57 54 52 48 47 60 52 67 67 64 62 59 57 53 52 65 57 

6 2714 55 56 55 54 48 42 36 32 54 46 64 64 61 59 56 54 50 49 62 54 69 69 66 64 61 59 55 54 67 59 

8 3619 60 58 61 62 53 46 42 35 61 53 66 68 67 64 59 56 51 50 66 58 73 73 72 69 64 61 56 55 71 63 

10 4524 62 60 63 64 55 48 44 37 63 55 70 70 69 66 61 58 53 52 68 60 75 75 74 71 66 63 58 57 73 65 

Definitions: 

f m in Hz: Octave centre frequency 

L W in dB/octave: Noise power level measured in the echo chamber 

L WA in dB(A): Total noise power level , A-weighted 

L in dB(A): Noise pressure level, A-weighted, room insulation of 8dB/octave taken into account 

∆p g in Pa: Total pressure difference (measured in front of and behind the volume fl ow controller) 

V in m3/h: Volume fl ow 

v in m/s: Flow velocity 


33



Noise levels ● PPs -VAV with integrated maintenance-free measuring system, circular model 

Table 6: Radiated noise 

∆p g = 100 pa ∆p g = 250 pa ∆p g = 500 pa 


v in m/s 

V in m3/h 

63 HZ 

125 Hz 





250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

8000 Hz 

LWA in dB(A) 

L in dB(A) 

63 HZ 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

8000 Hz 

LWA in dB(A) 

L in dB(A) 

63 HZ 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

8000 Hz 

LWA in dB(A) 

L in dB(A) 

160 

200 

250 

315 

400 

2 148 30 28 21 20 26 28 15 9 31 23 33 26 24 25 36 38 31 20 42 34 33 25 26 31 42 47 41 33 50 42 

4 290 38 32 27 23 27 27 20 7 32 24 43 36 32 29 36 38 30 22 41 33 42 37 36 34 42 45 39 32 49 41 

6 434 41 34 32 29 30 29 22 9 35 27 47 41 38 33 37 38 33 23 43 35 48 44 42 38 44 46 40 33 49 41 

8 579 46 41 40 39 35 31 22 10 41 33 49 43 42 38 40 40 35 26 45 37 54 48 47 41 46 47 41 34 51 43 

10 724 51 45 46 46 41 37 28 18 47 39 52 46 45 42 43 42 36 26 48 40 54 50 49 44 47 48 43 35 53 45 

2 226 24 22 20 19 20 20 20 6 26 18 28 30 27 27 26 28 27 22 34 26 37 31 28 32 34 37 32 33 41 33 

4 452 31 33 27 23 23 27 20 6 31 23 38 37 33 30 30 30 29 29 37 29 53 39 37 42 39 38 34 34 45 37 

6 679 38 37 32 28 28 28 20 12 33 25 44 43 38 34 33 35 31 29 40 32 47 46 42 44 41 40 35 34 47 39 

8 905 39 39 35 33 33 30 22 14 37 29 45 44 41 39 38 38 32 26 43 35 47 47 46 45 44 43 41 37 50 42 

10 1131 43 43 39 37 38 33 26 19 41 33 52 49 45 41 40 40 34 30 46 38 54 52 49 47 44 44 41 38 51 43 

2 353 30 28 21 20 26 28 15 9 31 23 33 26 24 25 36 38 31 20 42 34 33 25 26 31 42 47 41 33 50 42 

4 707 38 32 27 23 27 27 20 7 32 24 43 36 32 29 36 38 30 22 41 33 42 37 36 34 42 45 39 32 49 41 

6 1060 41 34 32 29 30 29 22 9 35 27 47 41 38 33 37 38 33 23 43 35 48 44 42 38 44 46 40 33 49 41 

8 1414 46 41 40 39 35 31 22 10 41 33 49 43 42 38 40 40 35 26 45 37 54 48 47 41 46 47 41 34 51 43 

10 1767 51 45 46 46 41 37 28 18 47 39 52 46 45 42 43 42 36 26 48 40 54 50 49 44 47 48 43 35 53 45 

2 561 34 34 31 29 25 24 24 24 33 25 39 34 35 37 41 41 41 42 45 37 44 39 40 42 46 46 46 47 50 42 

4 1122 44 42 36 35 30 27 22 21 38 30 52 48 43 41 42 40 38 40 47 39 57 53 48 46 47 45 43 45 52 44 

6 1683 46 44 38 37 32 29 24 23 40 32 54 50 45 43 44 42 40 42 49 41 59 55 50 48 49 47 45 47 54 46 

8 2244 51 44 42 41 34 32 29 25 43 35 59 55 50 47 45 44 42 42 52 44 64 60 55 52 50 49 47 47 57 49 

10 2806 53 46 44 43 36 34 31 27 45 37 61 57 52 49 47 46 44 44 54 46 66 62 57 54 52 51 49 49 59 51 

2 905 33 36 33 33 25 26 26 24 34 26 40 37 35 35 40 40 40 40 45 37 45 42 40 40 45 45 45 45 50 42 

4 1810 45 42 39 39 33 30 26 22 40 32 54 50 45 45 41 42 40 39 48 40 59 55 50 50 46 47 45 44 53 45 

6 2714 47 44 41 41 35 32 28 24 42 34 56 52 47 47 43 44 42 41 50 42 61 57 52 52 48 49 47 46 55 47 

8 3619 52 46 47 47 40 36 34 27 49 41 60 56 53 53 46 46 43 42 54 46 65 61 58 58 51 51 48 47 59 51 

10 4524 54 48 49 49 42 38 36 29 51 43 62 58 55 55 48 48 45 44 56 48 67 63 60 60 53 53 50 49 61 53 

Definitions: 












Noise levels ● Steel VAV with integrated measuring system, circular model 


v in m/s 

V in m3/h 

63 HZ 

125 Hz 

∆p g = 125 pa ∆p g = 250 pa ∆p g = 500 pa 





250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

8000 Hz 

LWA in dB(A) 

L in dB(A) 

63 HZ 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

8000 Hz 

LWA in dB(A) 

L in dB(A) 

63 HZ 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

8000 Hz 

LWA in dB(A) 

L in dB(A) 

100 

125 

160 

200 

225 

250 

280 

315 

355 

400 

3 85 33 40 37 35 34 33 32 33 39 31 37 43 43 41 39 38 37 31 46 38 41 48 47 46 45 44 41 41 52 44 

6 170 41 54 49 45 40 36 35 34 45 37 43 57 54 50 46 44 43 36 53 45 45 61 58 56 53 52 47 46 58 50 

9 257 45 55 51 45 40 37 25 35 49 41 48 63 59 57 51 48 46 39 56 48 53 69 66 61 57 54 51 50 62 54 

12 344 51 56 55 51 45 40 37 35 52 44 58 67 63 58 53 49 47 42 59 51 56 71 67 63 59 56 54 52 65 57 

3 130 40 42 39 37 36 35 34 36 41 33 45 45 45 43 41 40 39 39 48 40 49 50 49 48 47 46 43 42 54 46 

6 263 48 56 51 47 42 38 37 37 47 39 51 59 56 52 48 46 45 44 55 47 53 63 60 58 55 54 49 47 60 52 

9 396 52 57 53 47 42 39 37 38 51 43 56 65 61 59 53 50 48 47 58 50 61 71 68 63 59 56 53 51 64 56 

12 530 58 58 57 53 47 42 39 38 54 46 66 69 65 60 5 51 49 46 61 53 64 73 69 65 61 58 56 53 67 59 

3 216 43 44 43 39 38 37 36 37 43 35 48 47 47 45 43 42 41 37 50 42 55 52 51 50 49 48 45 46 56 48 

6 434 51 58 53 49 44 40 39 38 49 41 54 61 58 54 50 48 47 42 57 49 59 65 62 60 57 56 51 51 62 54 

9 652 55 59 55 49 44 41 39 39 53 45 59 67 63 61 55 52 50 45 60 52 67 73 70 65 61 58 55 55 66 58 

12 871 61 60 59 55 49 44 41 39 56 48 69 71 67 62 57 53 51 48 63 55 70 75 71 67 63 60 58 57 69 61 

3 337 49 46 43 41 40 39 38 38 45 37 54 49 49 47 45 44 43 44 52 44 60 54 53 52 51 50 47 47 58 50 

6 680 57 60 55 51 46 42 41 39 51 43 60 63 60 56 52 50 49 49 59 51 64 67 64 62 59 58 53 52 64 56 

9 1024 61 61 57 51 46 43 41 40 55 47 65 69 65 63 57 54 52 52 62 54 72 75 72 67 63 60 57 56 68 60 

12 1370 67 62 61 57 51 46 43 40 58 50 75 73 69 64 59 55 53 55 65 57 75 77 73 69 65 62 60 59 71 63 

3 422 51 47 44 42 41 40 39 38 46 38 55 50 50 48 46 45 44 44 53 45 61 55 54 53 52 51 48 48 59 51 

6 850 59 61 56 52 47 43 42 38 52 44 61 64 61 57 53 51 50 49 60 52 65 68 65 63 60 59 54 53 65 57 

9 1279 63 62 58 52 47 44 42 39 56 48 66 70 66 64 58 55 53 52 63 55 73 76 73 68 64 61 58 57 69 61 

12 1709 69 63 62 58 52 47 44 40 59 51 76 74 70 65 60 56 54 55 66 58 76 78 74 70 66 63 61 59 72 64 

3 529 53 48 45 43 42 41 40 39 47 39 57 51 51 49 47 46 45 45 54 46 63 56 55 54 53 52 49 49 60 52 

6 1065 61 62 57 53 48 44 43 40 53 45 63 65 62 58 54 52 51 50 61 53 67 69 66 64 61 60 55 54 66 58 

9 1604 65 63 59 53 48 45 43 41 57 49 68 71 67 65 59 56 54 53 64 56 75 77 74 69 65 62 59 58 70 62 

12 2144 71 64 63 59 53 48 45 41 60 52 78 75 71 66 61 57 55 56 67 59 78 79 75 71 67 64 62 60 73 65 

3 666 54 49 46 44 43 42 41 38 48 40 58 52 52 50 48 47 46 46 55 47 64 57 56 55 54 53 50 50 61 53 

6 1339 62 63 58 54 49 45 44 41 54 46 64 66 63 59 55 53 52 51 62 54 68 70 67 65 62 61 56 55 67 59 

9 2014 66 64 60 54 49 46 44 41 58 50 69 72 68 66 60 57 55 54 65 57 76 78 75 70 66 63 60 59 71 63 

12 2690 72 65 64 60 54 49 46 42 61 53 79 76 72 67 62 58 56 57 68 60 79 80 76 72 68 65 63 61 74 66 

3 843 55 50 47 45 44 43 42 39 49 41 57 47 42 44 45 47 40 45 56 48 66 58 57 56 55 54 51 51 62 54 

6 1692 63 64 59 55 50 46 45 41 55 47 63 61 53 53 52 53 46 50 63 55 70 71 68 66 63 62 57 56 68 60 

9 2543 67 65 61 55 50 47 45 42 59 51 68 67 64 61 58 56 54 53 66 58 78 79 76 71 67 64 61 60 72 64 

12 3394 73 66 65 61 55 50 47 42 62 54 78 71 62 60 58 57 56 56 69 61 81 81 77 73 69 66 64 62 75 67 

3 1073 56 51 48 46 45 44 43 41 50 42 61 54 54 52 50 49 48 48 57 49 67 59 58 57 56 55 52 52 63 55 

6 2160 64 65 60 56 51 47 46 41 56 48 67 68 65 61 57 55 54 53 64 56 71 72 69 67 64 63 58 57 69 61 

9 3252 68 66 62 56 51 48 46 42 60 52 72 74 70 68 62 59 57 56 67 59 79 80 77 72 68 65 62 61 73 65 

12 4347 74 67 66 62 56 51 48 43 63 55 82 78 74 69 64 60 58 59 70 62 82 82 78 74 70 67 65 63 76 68 

3 1364 57 52 49 47 46 45 44 42 51 43 64 55 55 53 51 50 49 49 58 50 59 60 59 58 57 56 53 53 64 56 

6 2736 65 66 61 57 52 48 47 43 57 49 70 69 66 62 58 56 55 54 65 57 73 73 70 68 65 64 59 58 70 62 

9 4111 69 67 63 57 52 49 47 44 61 53 75 75 71 69 63 60 58 57 68 60 81 81 78 73 69 66 63 62 74 66 

12 5488 75 68 67 63 57 52 49 44 64 56 85 79 75 70 65 61 59 60 71 63 84 83 79 75 71 68 66 64 77 69 

Definitions: 









35




Noise levels ● Steel VAV with integrated measuring system, circular model 


v in m/s 

V in m3/h 

63 HZ 

125 Hz 

∆p g = 125 pa ∆p g = 250 pa ∆p g = 500 pa 





250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

8000 Hz 

LWA in dB(A) 

L in dB(A) 

63 HZ 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

8000 Hz 

LWA in dB(A) 

L in dB(A) 

63 HZ 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

8000 Hz 

LWA in dB(A) 

L in dB(A) 

100 

125 

160 

200 

225 

250 

280 

315 

355 

400 

3 85 15 22 21 22 18 20 21 22 24 16 19 25 27 28 23 25 26 20 31 23 23 30 31 33 29 31 30 30 37 29 

6 170 23 36 33 32 24 23 24 23 31 23 25 39 38 37 30 31 32 25 38 30 27 43 42 43 37 39 36 35 43 35 

9 257 27 37 35 32 24 24 24 23 34 26 30 45 43 44 35 35 35 28 42 34 35 51 50 48 41 41 40 39 47 39 

12 344 33 38 39 38 29 27 26 24 37 29 40 49 47 45 37 36 36 31 44 36 38 53 51 50 43 43 43 41 50 42 

3 130 22 24 23 20 20 22 25 27 26 18 27 27 29 26 25 27 30 30 33 25 31 32 33 31 31 33 34 33 39 31 

6 263 30 38 35 30 26 25 28 28 33 25 33 41 40 35 32 33 36 35 40 32 35 45 44 41 39 41 40 38 45 37 

9 396 34 39 37 30 26 26 28 29 36 28 37 47 45 42 37 37 39 38 44 36 43 53 52 46 43 43 44 42 49 41 

12 530 40 40 41 36 31 29 30 29 39 31 48 51 49 43 39 38 40 38 46 38 46 55 53 48 45 45 47 44 52 44 

3 216 25 26 27 21 23 24 27 28 28 20 30 29 33 27 28 29 32 30 35 27 37 34 37 32 34 35 36 37 41 33 

6 434 33 40 39 31 29 27 30 29 35 27 36 43 44 36 35 35 38 33 42 34 41 47 48 42 42 43 42 42 47 39 

9 652 37 41 41 31 29 28 30 30 38 30 41 49 49 43 40 39 41 36 46 38 49 55 56 47 46 45 46 46 51 43 

12 871 43 42 45 37 34 31 32 32 41 33 51 53 53 44 42 40 42 39 48 40 52 57 57 49 48 47 49 48 54 46 

3 337 36 33 30 24 25 28 30 30 32 24 41 36 36 30 30 33 35 36 39 31 47 41 40 35 36 39 39 39 45 37 

6 680 45 47 42 34 31 31 33 31 38 30 47 50 47 39 37 39 41 41 46 38 51 54 51 45 44 47 45 44 51 43 

9 1024 48 48 44 34 31 32 33 32 42 34 52 56 52 46 42 43 44 44 49 41 59 62 59 50 48 49 49 48 55 47 

12 1370 54 49 48 40 36 35 35 32 45 37 62 60 56 47 44 44 45 47 52 44 62 64 60 52 50 51 52 51 58 50 

3 422 41 37 31 27 30 30 31 30 35 27 45 40 37 33 35 35 36 36 42 34 51 45 41 38 41 41 40 40 48 40 

6 850 50 51 43 37 36 33 34 30 41 33 51 54 48 42 42 41 42 41 49 41 55 58 52 48 49 49 46 45 54 46 

9 1279 53 52 45 37 36 34 34 31 45 37 56 60 53 49 47 45 45 44 52 44 65 66 60 53 53 51 50 49 58 50 

12 1709 60 53 49 43 41 37 36 32 48 40 66 64 57 50 49 46 46 47 55 47 66 68 61 55 55 53 53 51 61 53 

3 529 45 40 30 27 28 30 32 31 35 27 49 43 36 33 33 35 37 37 42 34 55 48 40 38 39 41 41 41 48 40 

6 1065 54 54 42 37 34 33 35 32 41 33 55 57 47 42 40 41 43 42 49 41 59 61 51 48 47 49 47 46 54 46 

9 1604 57 55 44 37 34 34 35 33 45 37 60 63 52 49 45 45 46 45 52 44 67 69 59 53 51 51 51 50 58 50 

12 2144 63 56 48 43 39 37 37 33 48 40 70 67 56 50 47 46 47 48 55 47 70 71 60 55 53 53 54 52 61 53 

3 666 46 41 33 31 33 32 32 29 37 29 50 44 39 37 38 37 37 37 44 36 56 49 43 42 44 43 41 41 50 42 

6 1339 55 55 45 41 39 35 35 32 43 35 56 58 50 46 45 43 43 42 51 43 60 62 54 52 52 51 47 46 56 48 

9 2014 58 56 47 41 39 36 35 32 47 39 61 64 55 53 50 47 46 45 54 46 68 70 62 57 56 53 51 50 60 42 

12 2690 64 57 51 47 44 39 37 33 50 42 71 68 59 54 52 48 47 48 57 49 71 72 63 59 58 55 54 52 63 55 

3 843 47 42 32 29 30 33 34 31 37 29 42 32 27 28 31 37 32 37 44 36 58 50 42 40 41 44 43 43 50 42 

6 1692 55 56 44 39 36 36 37 33 43 35 48 46 38 37 38 43 38 42 51 43 62 63 53 50 49 52 49 48 56 48 

9 2543 59 57 46 39 36 37 37 34 47 39 53 52 49 45 44 46 46 45 54 46 70 71 61 55 53 54 53 52 60 52 

12 3394 65 58 50 45 41 40 39 34 50 42 63 56 47 44 44 47 48 48 57 49 73 73 62 57 55 56 56 54 63 55 

3 1073 48 43 35 31 35 38 36 34 40 32 53 46 41 37 40 43 41 41 47 39 59 51 45 42 46 49 45 45 53 45 

6 2160 56 57 47 41 41 41 39 34 46 38 59 60 52 46 47 49 47 46 54 46 63 64 56 52 54 57 51 50 59 51 

9 3252 60 58 49 41 41 42 39 35 50 42 64 66 57 53 52 53 50 49 57 49 71 72 64 57 58 59 55 54 63 55 

12 4347 66 59 53 47 46 45 41 36 53 45 74 70 61 54 54 54 51 50 60 52 74 74 65 59 60 61 58 56 66 58 

3 1364 47 42 37 33 36 33 37 35 40 32 54 45 43 39 41 38 42 42 47 39 59 50 47 44 47 44 46 46 53 45 

6 2736 55 56 49 43 42 36 40 36 46 38 60 59 54 48 48 44 48 47 54 46 63 63 58 54 55 52 52 51 59 51 

9 4111 59 57 51 43 42 37 40 37 50 42 65 65 59 55 53 48 51 50 57 49 71 71 66 59 59 54 56 55 63 55 

12 5488 65 58 55 49 47 40 42 37 53 45 75 69 63 56 55 49 52 53 60 52 74 73 67 61 61 56 59 57 66 58 

Definitions: 









Table 9: Flow area 



Noise levels ● PPs VAV with integrated maintenance-free measuring system, rectangular model 

Width 

Height H [mm] 

B [mm] 100 160 200 250 300 400 

200 0,020 0,032 0,040 0,050 0,060 0,080 

300 0,030 0,048 0,060 0,075 0,090 0,120 

400 0,040 0,064 0,080 0,100 0,120 0,160 

500 0,050 0,080 0,100 0,125 0,150 0,200 

600 0,060 0,096 0,120 0,150 0,180 0,240 

700 0,070 0,112 0,140 0,175 0,210 0,280 

800 0,080 0,128 0,160 0,200 0,240 0,320 

900 0,090 0,144 0,180 0,225 0,270 0,360 

1000 0,100 0,160 0,200 0,250 0,300 0,400 


∆p g = 250 pa ∆p g = 500 pa ∆p g = 1000 pa 




Area A in m2 

v in m/s 

125 Hz 

250 Hz 


500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

LWA in dB(A) 

L in dB(A) 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

LWA in dB(A) 

L in dB(A) 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

LWA in dB(A) 

L in dB(A) 

1 

3 68 68 67 67 65 63 72 64 74 74 73 73 71 69 78 70 81 82 81 81 80 77 86 78 

6 73 73 72 71 69 67 76 68 78 79 78 77 76 74 82 74 84 85 84 84 84 82 90 82 

9 79 78 78 76 75 73 82 74 79 80 81 80 80 78 86 78 86 88 87 86 86 85 92 84 

12 81 81 80 79 78 76 85 77 85 85 84 84 82 81 89 81 87 89 89 90 89 88 95 87 


∆p g = 250 pa ∆p g = 500 pa ∆p g = 1000 pa 




Area A in m2 

v in m/s 

125 Hz 

250 Hz 


500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

LWA in dB(A) 

L in dB(A) 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

LWA in dB(A) 

L in dB(A) 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

LWA in dB(A) 

L in dB(A) 

1 

3 75 68 62 56 51 50 65 57 82 74 68 63 58 53 72 64 90 82 77 72 67 60 80 72 

6 80 72 66 58 54 50 69 61 85 80 73 66 62 57 76 68 95 85 79 75 70 66 83 75 

9 85 75 70 61 58 54 73 65 85 79 75 67 65 61 77 69 95 87 82 75 71 69 85 77 

12 86 77 71 63 60 57 74 66 90 83 78 70 66 64 80 72 94 87 84 78 73 71 86 78 

Table 12: Correction factor for fl ow noise and radiated noise 

A [m²] 0,04 0,06 0,08 0,10 0,12 0,16 0,2 0,25 0,3 0,4 0,5 0,6 0,8 1 

CF [-] - 14 - 12 - 11 - 10 - 9 - 8 - 7 - 6 - 5 - 4 - 3 - 2 - 1 0 

Note: 

The noise levels for the rectangular models are measured on a reference model with 1 m² area space A. For smaller 

dimensions please subtract the correction factor CF from table 12 to determine the right noise level (valid for fl ow noise 

and radiated noise). 

Definitions: 







w in m/s: Flow velocity 

A in m2: Flow area (W x H) 

CF 

Correction factor 


37



Sound levels ● Steel VAV with integrated measuring device, rectangular model 

Table 13: Flow area 

Width 

Height H [mm] 

B [mm] 100 160 200 250 300 400 

200 0,020 0,032 0,040 0,050 0,060 0,080 

300 0,030 0,048 0,060 0,075 0,090 0,120 

400 0,040 0,064 0,080 0,100 0,120 0,160 

500 0,050 0,080 0,100 0,125 0,150 0,200 

600 0,060 0,096 0,120 0,150 0,180 0,240 

700 0,070 0,112 0,140 0,175 0,210 0,280 

800 0,080 0,128 0,160 0,200 0,240 0,320 

900 0,090 0,144 0,180 0,225 0,270 0,360 

1000 0,100 0,160 0,200 0,250 0,300 0,400 


∆p g = 250 pa ∆p g = 500 pa ∆p g = 1000 pa 




Area A in m2 

v in m/s 

125 Hz 

250 Hz 


500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

LWA in dB(A) 

L in dB(A) 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

LWA in dB(A) 

L in dB(A) 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

LWA in dB(A) 

L in dB(A) 

1 

3 68 68 67 67 65 63 72 64 74 74 73 73 71 69 78 70 81 82 81 81 80 77 86 78 

6 73 73 72 71 69 67 76 68 78 79 78 77 76 74 82 74 84 85 84 84 84 82 90 82 

9 79 78 78 76 75 73 82 74 79 80 81 80 80 78 86 78 86 88 87 86 86 85 92 84 

12 81 81 80 79 78 76 85 77 85 85 84 84 82 81 89 81 87 89 89 90 89 88 95 87 


∆p g = 250 pa ∆p g = 500 pa ∆p g = 1000 pa 




Area A in m2 

v in m/s 

125 Hz 

250 Hz 


500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

LWA in dB(A) 

L in dB(A) 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

LWA in dB(A) 

L in dB(A) 

125 Hz 

250 Hz 

500 Hz 

1000 Hz 

2000 Hz 

4000 Hz 

LWA in dB(A) 

L in dB(A) 

1 

3 75 68 62 56 51 50 65 57 82 74 68 63 58 53 72 64 90 82 77 72 67 60 80 72 

6 80 72 66 58 54 50 69 61 85 80 73 66 62 57 76 68 95 85 79 75 70 66 83 75 

9 85 75 70 61 58 54 73 65 85 79 75 67 65 61 77 69 95 87 82 75 71 69 85 77 

12 86 77 71 63 60 57 74 66 90 83 78 70 66 64 80 72 94 87 84 78 73 71 86 78 

Table 16: Correction factor for fl ow noise and radiated noise 

A [m²] 0,04 0,06 0,08 0,10 0,12 0,16 0,2 0,25 0,3 0,4 0,5 0,6 0,8 1 

CF [-] - 14 - 12 - 11 - 10 - 9 - 8 - 7 - 6 - 5 - 4 - 3 - 2 - 1 0 

Definitions: 







w in m/s: Flow velocity 

A in m2: Flow area (W x H) 

CF 

Correction factor 


• General 

Nominal voltage 

Max. current 

Max. power input 

Reactivation time 

Operating temperature 

Humidity 

External power (without 

internal transformer) 

Power consumption 



230V AC/50/60Hz/+-15% 

200 mA 

28,6 VA 

600ms 

0 O C bis +55 O C 

max. 80 % relative, noncondensing 

24V AC/50/60Hz/+-10% 

25 VA 

• Case 

Protection type IP 20 

Material 

sheet steel 

Colour white, RAL 9002 

Dimensions (LxWxH) (290 x 208 x 100) mm 

Weight 

approx. 2,8 kg 

Terminals screw terminal 1.5 mm 2 

Technical Data 

• Differential pressure transmitter 

Measuring principle static 

Pressure range 

3...300 Pascal 

8...800 Pascal (optional) 

Response time 



290 

280 100 

Tender specification (short version): 

Fast multi-functional variable air volume controller VAV500-LON 

High-speed variable volume fl ow controller with auxiliary power, circular/rectangular model out of steel for variable control 

of room supply and exhaust air volume fl ows. Fast, stable and precise control due to direct control (Fast Direct Drive) of 

the high-speed actuator (3 s für 90°) with feedback potentiometer for the damper position. Control time from 2...24 s and 

all setpoint values programmable. All system data is saved on the voltage fail-safe EEPROM. Internal static differential 

pressure transmitter 3...300 Pa with high long-term stability, air volume range 10:1. Setpoint value via LON with LON-bus 

module, FTT-10A and room balancing (max. 16 consumers). Direct forced control via digital inputs for functions V MIN , 

V MED , V MAX and damper = SHUT (CAV-operating mode). Without additional pressure cascade. Power voltage 230V AC. 

Make: SCHNEIDER Type: VAV500-L-T-0 

Damper with maintenance-free measuring system and high-speed actuator, circular model, PPs 

Maintenance-free measuring system with damper, non-sensitive even in unfavourable fl ow conditions, DN250, PPs, without 

damper blade seal, without rubber lip seal, without insulation shell, socket/socket, high-speed actuator 3 s for 90° 

(Fast Direct Drive) with feed-back potentiometer for damper position. 

No liability for misprint or modifi cations • All rights reserved © SCHNEIDER 

208 

192 

- 

Dimensions ● Controller case ● Tender specifi cation 

Case VAV500: Top view 

Case VAV500: Side view 

+ 

Static differential pressure 

transmitter 

+ connection = overpressure 

- connection = underpressure 

208 

Cable clamp 

Make: SCHNEIDER Type: MD-250-P-0-0-0-MM-1 

OPTIONAL: RECTANGULAR MODEL 

Damper with measuring nozzle and high-speed actuator, rectangular model, galvanized steel 

Measuring nozzle with damper, width = 600 mm, height = 400 mm, galvanized steel, without damper blade seal, without 

insulation shell, fl ange/fl ange (standard), high-speed actuator 3 s for 90° (Fast Direct Drive) with feedback potentiometer 

for damper position. 

Make: SCHNEIDER Type: DD-600-400-S-0-0-1 

Note: 

Order air volume flow controller VAV500 and measuring system (MD, VD, DD, or KD) always separately. See order 

code on page 24 and 25. 

SCHNEIDER Elektronik GmbH Phone: +49 (0) 6171 / 88 479 - 0 

Industriestraße 4 Fax: +49 (0) 6171 / 88 479 - 99 

61449 Steinbach • Germany e-mail: info@schneider-elektronik.de

VAV500 Multi-functional variable air volume controller, analogue ...

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