Invento IFT Drives - Systemair

Invento 

IFT Drives 

Operating instructions

Invento EC Drive 

DOMEL 

Index: 

1.0 Safety ............................................................................................................................................ 4 

1.1 General warning ........................................................................................................................ 4 

1.2 Personal safety .......................................................................................................................... 4 

2.0 Mechanical dimensions ................................................................................................................. 5 

2.1 Mechanical dimensions IP55 type ............................................................................................ 5 

2.2 Mechanical dimensions IP20 type ............................................................................................ 6 

3.0 Mechanical installation ................................................................................................................. 7 

4.0 General information about electrical installation .......................................................................... 8 

4.1 High voltage warning ................................................................................................................ 8 

4.2 Grounding ................................................................................................................................. 8 

4.3 Installation to minimize EMI/RFI ............................................................................................. 8 

5.0 Electrical installation ............................................................................................................... 9 

5.1 Mains and motor ....................................................................................................................... 9 

5.2 Connecting the electrical system ............................................................................................ 10 

5.2.1 Mains supply connection and fuse protection .................................................................. 10 

5.3 User interface connection diagram ......................................................................................... 11 

6.0 Functions ..................................................................................................................................... 13 

6.1 Fault Relay output ................................................................................................................... 13 

6.2 Analog input AN1 ................................................................................................................... 13 

6.3 Analog input AN2 ................................................................................................................... 13 

6.4 Speed output............................................................................................................................ 13 

6.5 Star/Stop function: .................................................................................................................. 14 

6.6 Fire Mode function: ................................................................................................................ 14 

6.7 RS 485 serial communication ................................................................................................. 14 

6.8 DC voltage output: +10V ........................................................................................................ 14 

6.9 DC voltage output: +24V ........................................................................................................ 14 

7.0 MODBUS ................................................................................................................................... 15 

7.1 MODBUS Parameters ............................................................................................................. 15 

7.1.1 Description of supported Coils: control bits .................................................................... 15 

7.1.2 Description of supported Discrete Inputs: ....................................................................... 15 

7.1.3 Description of supported Holding Registers: ................................................................... 17 

7.1.4 Description of supported Input Registers: ....................................................................... 18 

8.0 General technical data: ................................................................................................................ 19 

9.0 Troubleshooting: ......................................................................................................................... 20 

DOMEL – Invento IFT EC Drives – Operating instruction 

Version: V3.0, June2013 

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DOMEL 

Document Version Number 1.00. 

DOMEL Invento IFT Drives 

Operating instruction 

These operating instructions can be used for all IFT drives. 

This operation instruction contains important technical advice and information about safety. 

Therefore please pay attention to this operation instruction before unpacking, installation or any 

other work is undertaken on this EC-controller! 

Indicates a general warning. 

Indicates a high-voltage warning. 

NOTE ! 

Important information 



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1.0 Safety 

1.1 General warning 

The voltage of the EC drive is dangerous whenever the drive is connected to the AC line. 

Incorrect installation of the motor or drive may cause damage to the equipment, serious 

injury or death. Comply with the safety instructions in this manual as well as local and 

national rules and safety regulations. 

1.2 Personal safety 

1. Disconnect the EC drive from the AC line if repair work is to be carried out. Wait 4 minutes to allow for electrical 

discharge before disconnecting motor and AC lines. 

2. The [ON / OFF] input on the user interface panel of the EC drive does not disconnect the drive from the AC line. Do not 

use it as a safety switch. 

3. Do not remove the terminal lines for the motor and AC line supply while the EC drive is connected to the AC line. 

Ensure that the AC line supply has been disconnected and then wait 4 minutes before removing motor and AC lines. 

4. The motor can be started by means of digital commands, bus commands, references or a local start command 

whenever the drive is connected to the AC line. Therefore, an unintended start may occur anytime power is applied. 

Never service the drive or equipment when power is applied to the drive. 

5. Before installing and operating this EC-controller please read this instruction carefully! 

Warning: 

It can be extremely dangerous to touch the electrical parts even when the 

mains supply has been disconnected. Also ensure that other voltage 

inputs are disconnected from load sharing through the DC bus. Wait at 

least 4 minutes after the input power has been removed before servicing 

the drive. 



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2.0 Mechanical dimensions 

2.1 Mechanical dimensions IP55 type 

The drawing below gives the mechanical dimensions of IFT EC drive - IP55 version. All dimensions are in millimeters. 



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2.2 Mechanical dimensions IP20 type 

The drawing below gives the mechanical dimensions of IFT EC drive – IP20 version. All dimensions are in millimeters. 



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3.0 Mechanical installation 

The EC drive is cooled by air circulation. IFT EC drive can be installed inside the AHU or on the motor console. It can be also installed 

on the wall. All types of IFT EC drive can be installed side-by-side. Domel recommended a minimum 50 mm space between them. 

The IFT EC mounts in virtually any position if sufficient cooling is assured. This free mounting position offers wide flexibility. 

The IP20 type of IFT already has a fan built-in so there is no need for additional cooling. For proper cooling it is recommended a 

minimum of 100mm of open space above and below the unit. (see Fig. 1). 

To ensure sufficient cooling of IP55 type IFT EC Drive it must be installed into the airflow, otherwise, it is necessary to provide 

additional cooling. For applications where user does not guarantee a proper cooling, Domel offers a special version of IFT EC Drive 

with external DC fan. 

To protect unit from overheating ensure that the ambient temperature is not exceeded. The maximum ambient temperature is listed in 

General technical data in this manual. Otherwise the lifetime of the EC Drive will be reduced. 

Fig 1: Side-by-side installation 

To ensure sufficient cooling of IP55 type IFT EC Drive it must be installed into the 

airflow. Otherwise, it is necessary to provide additional cooling. 

Improper cooling is one of the major reasons for unstable working and also 

reduce lifetime of IFT EC Drives. 

It is not allowed to install the IP20 Type of EC Drive into polluted atmosphere 

(aggressive gas, concentration of dust and damp, fat, corrosive substance). 



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4.0 General information about electrical installation 

4.1 High voltage warning 

The voltage of the EC drive is dangerous whenever the drive 

is connected to the AC line. Incorrect installation of the 

motor or drive may cause damage to the equipment, serious 

injury or death. Comply with the safety instructions in this 

manual as well as local and national rules and safety 

regulations. Touching electrical parts may be fatal - even 

after the equipment has been disconnected from the AC line. 

Wait at least 4 minutes for current to dissipate. 

4.2 Grounding 

Comply with the following at installation: 

 

 

Safety grounding: The drive has a high leakage current and must be grounded properly for safety. Follow all local 

safety regulations. 

High frequency grounding: Keep grounding cables as short as possible. 

Connect all grounds to ensure the lowest possible conductor impedance. The lowest possible conductor impedance is 

achieved by keeping the conductor as short as possible and by grounding with the greatest possible surface area. 

4.3 Installation to minimize EMI/RFI 

To minimize conducted and radiated high frequency emissions : 

Use only shielded/armored motor cables and shielded/armored control cables. 

Connect the shield to ground at both ends. 

Use attached cable clamps for installation to provide shielding at high frequencies. 

Fig 3a: Correct grounding 

Fig 3b: Incorrect grounding 

Correct grounding to minimize EMI/RFI emissions: Fig 3a 

Control cables and cables for serial communication must be attached with cable clamps at both ends to ensure maximum possible 

electrical contact. 

Incorrect grounding: Figure 3b 

Do not use screen ends that are twisted together – that will increase screen impendence at higher frequencies 



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5.0 Electrical installation 

5.1 Mains and motor 

 

 

 

Use a shield / armored motor cable to comply with EMC emission specifications, and connect this cable to both the 

decoupling plate and the motor metal. 

Keep the motor cable as short as possible to reduce the noise level and leakage currents. To reduce the operating 

problems, use shield cable. Max lengths of cables are described in 

Recommended to use hard wire or smooth copper wire with ferrule (Fig.4). 

Figure 4: Wire with ferrule 

Connection instructions: 

Unscrew the cable glands No3 (Fig. 5). Insert the motor cable through and mount the shield and connect the motor 

wires (1, 2, 3, 4, 5, 6) to the corresponding terminals M1, M2, M3, M4, M5, M6 

Screw the motor PE wire (yellow-green wire) to the corresponding place (Fig 5) 

 

 

 

 

 

 

 

Figure 6 show how to proper connect wire to the motor and mains terminals 

Remove the wasters for sealing cable glands No2 and insert the communication cable. Mount the cable and connect 

user interface terminals depends on request. Screw the cable gland for optimum IP protection. 

If Fault Relay function is needed then unscrew the cable No1. Connect the wires for Relay Fault to the corresponding 

terminals. Screw the cable gland for optimum IP protection. Do not use the same cable gland for Relay Fault as for 

communication cable. It could cause operating problems and instability control signals. 

Connect mains supply wires to the corresponding terminals PE (1), L1 (2), L2 (3), L3 (4) in the sequence 

If there is some blank cable gland, fill it with wasters for sealing. 

Check all connections again. 

Carefully replace the Top cover and connect the Power supply voltage. 

1 2 

3 

YG 

1 2 3 4 

Figure 5a: Proper connection wire to the motor and mains terminals (IP55 type) 



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Figure 5b: Proper connection wire to the motor and mains terminals (IP20 type) 

5.2 Connecting the electrical system 

Figure 6: How to Connect / Disconnect wire 

Check whether the data on the type plate agree with the connection data. 

Before connecting the device, ensure that the supply voltage matches the operating voltage of the device. 

Only use cables that are configured for current according to the specification on the type plate. 

5.2.1 Mains supply connection and fuse protection 

Nominal voltage: 3 x 380-460 V Cable cross - section 

Driver type Nominal Input Power [kW] Fuse [A] mm2 AWG 

IFT03 1,7 10 1,0 17 





User control 0,5 - 2,5 20 - 13 



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5.3 User interface connection diagram 

Terminal number 

Description 

Mains 

supply 

Motor 

connection 

L1 

L1 

L2 L2 Supply voltage 

L3 

L3 

PE PE PE connection 

M1 

M1 

M2 

M2 

M3 M3 Motor connection (1) 

M4 

M4 

M5 

M5 

M6 

M6 

NO 1 Normally open for fault 

Fault 

Relay 

COM 2 Common connection; Contact rating 250 VAC / 3 A 

NC 3 Normally close for fault 

A 14, 16 Bus connection RS485 - A; MODBUS RTU 

B 16, 17 Bus connection RS485 - B; MODBUS RTU 

User interface 

GND 13 I/O ground 

SO 4 

Digital output; Speed Output PWM signal; 

f ~ 1.1 kHz; NPN OC output 

GND 5, 9 I/O ground 

AN1 6 Analog Input 1; Set value 0-10 V; R ≥ 1 kΩ 

10V 7 +10 V ± 5 % / 15 mA 

AN2 8 Analog Input 2; Actual value 0 – 10 V; 

FIRE 10 

Digital input 1; FIRE mode: Enabling function - open pin; Disabling bridge to 

24 V 

24V 11 +23 V ± 10% DC (unregulated) voltage / Imax 50 mA 

RF 12 Digital Input 2; Run / Stop signal; Enabling: Bridge to 24 V; disabling: open pin 

NOTE: 

1. In case of wrong motor rotation, re-connect all motor wires as it is shown on Fig 7a and Fig 7b 

HOW TO 

RECONNECT 

Figure 7a: Current wires 

Figure 7b: Reverse wires 



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1 Potentiometer for set value / speed setting; R ≥ 1 kΩ 

2 External sensor with 0 – 10 V output 

3 Analog 0-10V / PWM / Pulse Speed output : NPN open collector for master / slave configuration 

4 Fire mode (switch open) 

5 Switch for disabling (switch closed) and enabling the electronic 



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6.0 Functions 

6.1 Fault Relay output 

The relay output can be used for giving the present status or warning. The relay is a Form C with contacts 1 and 2 normally 

closed. The output is activated when a given condition is fulfilled. 

Relay error function is activated if alarm situation is occurred in the IFT EC Drive: 

• Under voltage protection, 

• Overcurrent detection. 

• Overheating detection, 

• Blocked rotor detection, 

• Controller Error detection – Internal error of electronics, 

• DC Under voltage protection 

The error state is automatically reset by removal all error caused. 

6.2 Analog input AN1 

IFT EC Drive can be controlled by external analog signal 0-10V or by potentiometer. Before motor start it must be Start/Stop 

(RF) signal must be given. Start/Stop signal is given with short-circuit between terminals 11(+24V) and 12(Start/Stop). 

Also parameter "Operation Mode" must be cleared - Operation Mode = 0. 

Speed control by external analog signal: 

Speed is controlled by connecting external analog signal 0-10V to the terminal 6 (AN1) and terminal 5 (ground). Electronics 

controls speed linear from RPM min to RPM max. Maximal speed is defined as an input voltage 9,5V ± 3%. 

Electrical parameters: Vin max = 12V; Zin=10kΩ; Resolution 10-bit 

Important: 

Wrong polarity at input AN1 can cause serious damage on the controller. 

Speed control by Potentiometer: 

IFT EC Drive can be controlled by external potentiometer (1kΩ < R pot < 100kΩ) connected to terminals (5 ground), 

(6 input AN1) and (7 +10V). If the direction of rotary potentiometer is incorrect, change the wires on terminal 5 and 7. 

Electrical parameters: Three-wire, Rpot=1k-100kΩ, Zin=10kΩ 

6.3 Analog input AN2 

IFT EC Drive can be controlled by external analog input signal AN2 for external sensor (temperature, CO2, smoke sensor, 

etc.). Signal from external sensor connect to the terminal 8 (AN2) and terminal 9 (ground). For power supply external sensor 

use built in 24V output (terminal 11). More information about 24V DC power supply see chapter 6.9. 

Electrical parameters: 0 < Vin max < 10V; Vin max = 12V; Zin=10kΩ; Resolution 10-bit 

Important: 

PID Control: 

Wrong polarity at input AN2 can cause serious damage on the controller. 

Electronics is equipped with internal PID regulator via AN2. The PID Control uses the value on the AN1 as Set Point value. 

For additional PID control parameter setting see chapter 7.1 (MODBUS Parameters). 

6.4 Speed output 

IFT EC Drive is equipped with an Open Collector speed output signal for current speed monitoring. 

Speed output mode could be set as: 

Frequency output f=1,2kHz / 25mA, 

PWM output – D=0%↔RPM=0, D=100%↔RPM=100%, 

PWM output – 10V / 1mA, 

Current generator output 0-20mA, 

Current generator output 4-20mA, 

Voltage generator output 0-10V/1mA. 

For additional parameter setting see chapter 7.1 (MODBUS Parameters). 



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6.5 Star/Stop function: 

IFT EC Drive is equipped with Start/Stop function. If the controller has all conditions for run, the motor goes run when the 

terminal pins 11 and 12 are connected together. 

Electrical parameters: Operating voltage = 24V, Zin=10kΩ 

6.6 Fire Mode function: 

IFT EC Drive is equipped with Fire mode function. In this case IFT EC Drive run as emergency controlled unit, (for example: 

exhaust the smoke from burning building), with disabled protections and functions. 

In fire mode case: 

Overheating protection - disable, 

Under voltage protection - disable, 

Start/Stop function - ignore 

Set RPM via AN1 or Potentiometer - ignore 

Set RPM via AN2 - ignore 

In Fire mode function electronics runs with parameters valid only for Fire mode functions (RPM, over temperature limits, …) . 

These parameters should be sets via MODBUS registers. The function should be enabled by disconnect the terminal pins 

(10) and (11). We recommended purpose switch. For disable the function disconnect terminal pins (switch=ON). 

Electrical parameters: Operating voltage = 24V, Zin=10kΩ 

NOTE! 

Fire mode function is useable only for protection in case of burning building, for 

exhaust smoke from the building. In normal condition fire mode is not allowed to 

use. In case for damage of the controller by unauthorized use, Domel does not 

take over any responsible for damage on the controller or motor. 

6.7 RS 485 serial communication 

IFT EC Drive can be controlled via RS – 485 Modbus RTU over serial line. Unit is fully compatible with control devices that 

communicate via MODBUS RTU protocol. Other protocols are not supported. 

For additional information about MODBUS communication see the chapter 7.0. 

6.8 DC voltage output: +10V 

IFT EC Drive is equipped with 10VDC / 15mA DC voltage output for power supply external potentiometer. 

The 10 VDC supply is galvanically isolated from the supply voltage, but has the same potential as the analog and digital 

inputs and outputs. 

Power supplying other loads is not allowed. 

Electrical parameters: 10,5V +/- 5% (regulated); 15mA; Terminal number: 7 

6.9 DC voltage output: +24V 

The 24 VDC supply is galvanically isolated from the supply voltage, but has the same potential as the analog and digital 

inputs and outputs. This voltage is used as power supply external sensor. 

Electrical parameters: 23VDC +/- 10% (not regulated); 50mA; Terminal number: 11 



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Galvanic isolation (PELV) 

PELV (Protective Extra-Low Voltage) separation is achieved with galvanic separators betwee 

control circuits and circuits connected to the AC line potential. These separators meet the 

requirements for increased isolation in standard EN 50 178. Installation must be in accordance 

with local and national PELV regulations. 

All control terminals, terminals for serial communication and relay terminals are safely separated 

from the AC line potential, i.e. they comply with the PELV requirements. Circuits that are connected 

to control terminals 4 - 12 are galvanically connected to one another. Serial communication connected 

to terminals 14 - 17 is also galvanically connected to one another. The relay contacts in terminals 

1 - 3 are separated from the other control circuits with increased isolation, i.e. these comply with 

PELV even if there is AC line potential in the relay terminals. 

7.0 MODBUS 

The default IFT EC drive MODBUS address is 53 and default baud rate is 19200bps with 1 Start bit, 8 data bits, 2 Stop bits and No 

Parity. To control IFT EC Drive via MODBUS write value "2" to the parameter "Operation Mode". Once unit has been control via 

MODBUS analog inputs 0-10V and Start/Stop signal are ignored. 

MODBUS slave address and other parameters (Baud rate, Parity and Stop bit) can be changed. Supported baud rates are 9200bps, 

19200bps and 38400bps. IFT EC drive support Even and Odd Parity and 1 Stop bit. 

Supported MODBUS commands: 

0x01: Read Coils 

0x02: Read Input 

0x03: Read Holding Registers 

0x04: Read Input Register 

0x05: Write Single Coil 

0x06: Write Single Holding Register 

7.1 MODBUS Parameters 

The following table gives an overview of all parameters. Table shows Memory address, MODBUS address, default value of parameter, 

which parameter is password protected and which authorization level is required to write a parameter, scale factor, parameter unit and 

description. 

7.1.1 Description of supported Coils: control bits 

MODBUS Address: 0000 

R/W [0] R/W [0] R/W [0] R/W [0] R/W [0] R/W [0] R/W [0] R/W [0] 

MSB 0 0 0 0 0 0 0 0 

LSB 


0 0 0 0 0 

SET 

FIRE 

RESET 

MOTOR 

ON/OFF 

Description: 

MOTOR ON/OFF: For indication only: 1 = ON / 0 = OFF 

RESET: EC Drive Software reset.: 1= RESET controller 

SET FIRE: For indication only: 1 = FIRE mode ON / 0 = FIRE mode OFF 

7.1.2 Description of supported Discrete Inputs: 

MODBUS Address: 0000 


MSB FIRE Reserved RunEX Reserved BLOCK_M W2S SYS_ERR Reserved 


LSB WORM DC_UV OC Reserved HOT FLTA UV OV 



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DOMEL 

Description: 

OV: Over Voltage Fag – if the input voltage is higher than HI limit for input voltage the flag OV is set, otherwise is cleared 

UV: Under Voltage Flag – if the input voltage is lower than LO limit for input voltage flag UV is set, otherwise is cleared 

FLTA: Over Current Flag – if motor current is too high hardware over current occur and set FLTA flag 

WORM: EC Drive is worm Flag – ‘1’ means that temperature of controller is higher than normal, but not too high – Power 

reduction function begins. 

HOT: Over temperature Flag – ‘1’ means that temperature of controller too high - Motor Stops 

DC_UV: DC under voltage Flag - – if the DC voltage is under LO limit DC_OV flag is set, otherwise is cleared – if DC_OV 

= ’ 1’ Motor Stops 

OC: Internal Logic Fault Flag – overcurrent against GND protection – if current is too high OC flag is set. 

SYS_ERR: System Error Flag – There was an error detected during circuit internal check 

W2S: Waiting to stop Flag – If flag is set motor should be stopped, but is still spinning 

BlockM: Blocked Rotor Flag – If set Motor should run but it does not 

RunEXT: External ON/OFF input FLAG 1: ON/OFF input was activated 

FIRE: Fire set Flag 1: FIRE input was activated (terminal 9 should not be connected 

to terminal 7 (+24V DC) 

All flags are Read only. Flag status depends on EC Drive status. 



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7.1.3 Description of supported Holding Registers: 

Holding Regist er 

5 0 Set point_P 

Perform ance setpoint for speed 

depends on Operation Mode 

10000 0 0.01 W/1 % 

6 1 Reserved 

7 2 MaxRPM Maximal set s peed 0 - 6000 1500 1 W/1 m in-1 

8 3 FireSpeed RPM when fire mode is active 

2/3*MaxRPM[level2] … 

MaxRPM[level2] 

1500 1 W/2 m in-1 

9 4 MinRPM Minimal allowed speed MinRPM[level+1] ... MaxRPM 250 1 W/1 m in-1 

10 

11 

5 

6 

Password 

Operation Mode 

0: level 0, all settings locked (default 

password for level 1) 

1: pass word for current level will be 

dis able d with 10020 

10000: store value s to EEPROM at 

current level (will override lower 

levels) 

10001: restore values from 

EEPROM (las t saved values) 

10002: restore default values from 

one level above current 

10020: set previous value as password 

(will not be accepted if desired 

password matches 10000..11000 or 

level is when in access level 

>=2 »motor will run at "Fire Speed" 

12 7 ModbusAddress 

Set Modbus address: 

Write 10000 to Pas sword to save. 

Restore by writing to broadcast 1 .. 247 1 1 W/1 / 

address (0) (in cas e you forgot 

address ) 

13 8 Reserved 

14 9 FireLim it Fixed fire speed 0 0 W/2 

15 10 Reserved 

16 11 Kp External controller proportiona l gain 100..32000 1000 0.001 W/1 / 

17 12 Ti 

External controller Integration time 0: no 

integration 

0..32000 100 0.1 W/1 / 


19 14 PIDMin PID regulator minimum output 0..10000 1000 0.01 W/1 / 

20 15 PIDMax PID regulator maximum output 0..10000 10000 0.01 W/1 / 

21 16-19 Reserved 

22 20 - 25 Factory Settings 


29 28 Resonance1 

Rpm where 1. resonance occurs (s et 0 

to ignore). 

0..10000 0 1 W/1 m in-1 



to ignore). 

0..10000 0 1 W/1 m in-1 



to ignore). 

0..10000 0 1 W/1 m in-1 

32 31 ResonanceWidth Width of resonance avoidance band. 2..20 2 1 W/1 % 




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DOMEL 

Controller Configuration 

34 

35 

100 

101 

Speed output mode 

SO output signal 

0: disabled (input) 

1: 2..10V (1mA) 

2: FREQ(10V, 1mA) 

3: PWM(25mA) 

4: PWM(10V,1mA) 

5: 0..20mA 

6: 0..10V(1mA) 

7: 4..20mA 

8: FREQ(25mA) 

9: hhh 

>9: reserved 

2: reserved 

0…9 

-10000…2 

6 

1 

1 

0.01% 

W/1 

W/1 

/ 

/ 

7.1.4 Description of supported Input Registers: 

Input Registers 

36 1 EC drive type EC Drive type *1 NaN R/0 / 

37 2 Firmware version Software version *2 NaN R/0 / 

38 3 Required Speed Required speed in RPM 0 1 R/0 m in-1 

39 4 Speed Current speed in RPM 0 1 R/0 % 

40 5 Temperature Controller Temperature 0 0.1 R/0 °C 

41 6 DC Bus Voltage DC Bus Voltage in V 0 1 R/0 V 

42 7 AC voltage AC Voltag in V 0 0.1 R/0 V 

43 8 15V DC Voltage 15V Power supply in V 0 0.1 R/0 V 

44 9 Analog Input 1 Analog input 1 voltage -300..2000 0 0.01 R/0 V 

45 10 Analog Input 2 Analog input 2 voltage -300..2000 0 0.01 R/0 V 


47 12 SO voltage Speed Output output voltage -300..2000 0.01 R/0 V 

48 13 SO current Speed Output output current -300..3300 0.01 R/0 A 

49 14 R/0 

50 11 Minutes Operating minutes counter 0 - 1439 0 1 R/0 Minutes 

51 12 Day Operating days counter 0 - 65535 0 1 R/0 days 

52 13 FM_Min_Last 

Fire Mode function: Operating mi nutes 

counter (las t event) 

0 - 1439 0 1 R/0 m in 

53 

54 

14-18 

19 

Reserved for debug 

ErrorCode 

Red LED error codes (priority in the 

order below): 

7 = motor failed to start repeatedly 

6 = under or overvoltage 

5 = motor missconnected/faulty 

4 = internal frequency converter fault 0..7, -1 x 1 

R/0 

3 = temperature protection active 

2 = active overcurrent protection 

1 = slow blink=standby 

-1 = fast blink (fire activated) 

0 = always on (operating normally) 

55 20 FireMinutes Minutes under fire mode. 0-1439 1 R/0 m in 

56 21 FireDays Days under fire mode. 0 - 65535 1 R/0 days 

57 22 FireCycles Fire Mode function: Event counter 1 R/0 

58 23 OpMinutes Minutes of operation 1 R/0 m in 

59 24 OpDays Days of operation (RPM>0, no error) 0 - 65535 0 1 R/0 days 


Notes: 

*1: depends on the type of housing, max current 

*2: last version of firmware 



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8.0 General technical data: 

Mechanical Data 

EC type IFT02 IFT03 IFT04 IFT06 IFT08 IFT11 

Physical appear ance 

Dimensi ons, IP20 

mm 

Fig.1 (IP55 type), Fig. 2 (IP20 type) 

335 x 155 x 118,5 

/ 

Dimensi ons, IP55 

mm 

332 x 281 x 112 

Weight, IP20 kg 4,0 

5,5 

/ 

Weight, IP55 kg 5,5 

6,2 6,5 7,2 7,5 

Electrical Data 

Input 

Supply voltage 

V AC 

3 x 380 - 460 +10% / -10% 

Supply frequency 

Hz 

50 / 60 

Power consumption at ma x. load A 

Input Power 

kW 

Power factor (at nomi nal load) 

> 0,9 

M ax. cable cross secti on (power) mm2 / AWG 1,0 / 18 1,0 / 18 1,5 / 16 1,5 / 16 2,5 / 14 4,0 / 12 

M ax. pre-fuses A 10 10 15 15 20 25 

Motor Output 

Voltage 

V 

3 x 380 - 460 +10% / -10% 

M ax. Output current A 3 x 2.0 3 x 3.0 3 x 4.4 3 x 6.0 3 x 8.0 3 x 11.0 

Env ironment specifications 

Operating temperature °C 

-40°C to + 50°C 

Storage tempera ture °C 

-40°C to + 50°C 

M ax. rel ative humidity, IP55 % 

5 - 90 

Encl osure, IP20 NP NP NP 

Encl osure, IP55 

Encl osure material IP55 

M ax motor ca ble( shil ded ) 

m 

Aluminum 

10 

Protection 

M otor 

Inputs 

Interface 

Digtal Communication 

M ODBUS RTU via seri al RS485 14,16 

M ODBUS RTU via seri al RS485 15,17 

Digital Inputs 

Terminal number Function 

Fire 10 Digital input 1; FIRE mode: Enabling f unction - open pin; Disabling: bridge to 24 V 

Run / Stop (RF) 12 Digital input 2; Run / Stop signal; Enabling: Bridge to 24 V; Disabling: open pin 

Analogue Inputs 


AN1 6 Analog Input 1; Set value 0-10 V; R ≥ 1 kΩ 

AN2 8 Analog Input 2; Actual value 0 – 10 V 

Digital Output 

Speed Output 4 


Alarm Relay 


NO 1 Normally open for fault 

COM 2 Common connection; Contact rating 250 VAC / 3 A 

NC 3 Normally close for fault 

DC Volatage 


+10V 7 DC voltage: +10 V ± 5 % / 15 mA 

+24V 11 DC voltage: +23 V ± 10% DC (unregulated) voltage / Imax 50 mA 

GND 5, 9, 13 I/O ground 

Functions 

Technology 

Flying Start 

Ra mp-Up time 

Ra mp-Down time 

Alarm 

Alarm Reset 

Service data log 

Software updati ng 

M otor parameters 

Fire M ode 

Approv als 

EM C standa rd, Emissi on 

EM C standa rd, Immunity 

Safety standar ds 

ROHS Di rective 

Product approval s 

sec 

sec 

Bus connection RS485 - A; 2 x MODBUS RTU via terminals for w ire max 1,5mm 2 

Bus connection RS485 - B; 2 x MODBUS RTU via terminals for w ire max 1,5mm 2 

Digital output; Speed Output PWM signal; f ~ 1.1 kHz; NPN OC output 

Domel algoritem, Trapezoidal curr ent 

YES 

1 - 30 

1 - 30 

YES 

YES, via MODBUS or pow er dow n f of more than 1 minutes 

Operating time, Alarms, Alarm Counters, Max Temperature w ith 1 hour history, Fire Mode function parameters 

NO 

Programable by Domel or authorised user 

Nominal pow er for 2 hours at 400°C (IP55 type only) 

YES 

CE 



19


DOMEL 

9.0 Troubleshooting: 

IFT 

Errors /Warnings 

Relay error Modbus error Restart Required Restart Required 

Message Warning Manual Restart * Auto Restart 

Limits /Remarks 

1 AC Input undervoltage x x x 100V < UAC < 300V 

2 DC Link undervoltage x x x UDC_link < 120V 

3 DC Link overvoltage x x x UDC_link > 780V 

4 Blocked rotor 

x x x Auto restart after 1s; 50 repeats 

x x x Manual restart required after 50 repeats 

5 Phase overcurrent 

x x x Motor phase current 130% Inominal 

x x x Contact motor phase to earth (PE) 

6 Driver's DC voltage Low x x x U15V_DC < 13V 

7 Overheathing windings No overheating windings protection 

x 

Temp. electronics > 80°C. reducting output power 

8 Overheating electronics 

Automatlically restart 

Temp. electronics > 90°C. Motor shutdown: 

x x x 

Decreasing Temp. of electronics below 60°C. 

Controller error (internal 

10 error of electronics ) 

x x x 

11 Fire mode activated x 

Fire mode function activated – some protection are 

disabled 

12 Waithing to stop x Indicator - Tells when motor stop 

13 Run active x Indicator 

* Disconnect controller from Power distribution network for 5 min 



20

Invento IFT Drives - Systemair

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