2. Basic circuits: Manual controllers - Intra lighting

2. Basic circuits:
Manual controllers
2.1 Control via potentiometer
The simplest way of controlling a lighting system is with a suitably
dimensioned potentiometer (available in electrical retail outlets). Since the
control output of the DIM ECG is generated by the ECG itself, the resistance
value depends on the number n of connected ECGs. It can be calculated
using the following formula:
100 k Ω log
R Poti =
n
If the calculated value is not in the r esistance table the next higher value
should be used, other wise the lamps cannot be operated at their full output
(note: this over-dimensioning may mean that the potentiometer may not turn
through a complete r otation for controlling the brightness).
The potentiometer must be designed for an output of P pot = 2.8 (mW) · n.
A mains switch is also needed to switch the lighting system on and off. When
connecting the potentiometer make sur e that the full lighting level is reached
when the potentiometer is turned to the right.
If more than two ECGs ar e connected it is nor mally better to use a DIM MCU
manual control unit.
Application
Floor-standing luminaires, single luminair es
Control via potentiometer
N
L
1
–
+
DIM ECG
2
3
4
Lamp
On/Of f
switch
N
L
N
L
–
+
DIM ECG
1
2
3
4
Lamp
Potentiometer
R =
100 k Ω log.
n
n: Number of ECGs connected
L N – +
N
1
L
2
DIM ECG
3
–
+ 4
Lamp
2.2 Systems with up to 50 ECGs
with manual control unit DIM
MCU
Manual control unit DIM MCU is the standard solution for manual brightness
control from a single contr ol point (e.g. in small to medium size rooms with
one door).
A maximum of 50 DIM ECGs can be controlled with on manual control unit.
Control with a combination of two or more manual control units is not
possible. If more than one control point is to be installed it is best to equip the
system with DIM ICM 10 and louvre switches (see 2.3).
Application
Offices, small meeting rooms
1

Switching on/offf
There is a pushbutton integrated in the manual control unit (electrically
isolated from the brightness control). This switching contact is used to
actuate r elays to switch ECGs together in different circuits or on different
mains phases. A maximum of 10 single-lamp or 5 two-lamp dimmable
ECGs can be switched directly in a circuit.
Wiring diagram for systems
with a maximum of 10 singlelamp
dimmable ECGs or 5 twolamp
dimmable ECGs
N
L
1
–
+
DIM ECG
2
3
4
Lamp
– +
Manual Control Unit
DIM MCU
L N – +
N
L
N
L
–
+
DIM ECG
N
L
DIM ECG
1
2
–
+
3
4
1
2
3
4
Lamp
Lamp
Wiring diagram for systems
with a maximum of 50 dimmable
ECGs
N
L 3
L 2
L 1
N
L
Relais
N
L
–
+
DIM ECG
1
2
3
4
Lamp
– +
Manual Contr
DIM MCU
ol Unit
L 1 L 2 L 3
N – +
}
N
L
–
+
DIM ECG
N
L
DIM ECG
1
2
–
+
3
4
1
2
3
4
Lamp
Lamp
Max. 50 DIM ECG
For systems with mor e than 50 dimmable ECGs see 4.7
Installation
The manual control unit is suitable for installation in flush-type boxes with a
diameter of 55/60 mm. There are two versions available. DIM MCU P is
supplied with a rotary button and cover plate, wher eas DIM MCU has neither
of these. In this case, the button and cover plate should be pur chased
separately from the Berker , Gira or Jung range.
Please note:
The manual control unit may be destroyed if incorrectly installed.
A separate supply voltage is not required for the manual control unit.
Setting the minimum brightness
Once the system has been installed, switch off all lighting, turn the button on
the manual control unit to the left as far as it will go and adjust the trimmer
until you can see light.
2

71
80
Trim potentiometer
for setting
the minimal
brightness
Sicherung
71
80
4
33
33
51
60
54
DIM MCU
54
DIM MCU P
Technical data for manual control units DIM MCU
Reference:
DIM MCU or DIM MCU P
Dimensions:
for flush-type box Ø = 55/60 mm (see dimensional diagram)
Rotar y axis: Ø = 4mm, l =14 mm and 6 mm thr ead
Type of fixing:
Claws or screws
Permissible ambient temperature – 20 °C to + 50 °C
Terminals:
Scr ew terminals
Permissible wire cr oss-section: max. 1.5 mm 2
Terminal –:
– (control signal)
Terminal +:
+ (control signal)
Terminal and
Switching contact 230V mains voltage
Mains connection:
Not required
Effects of incor rect wiring
230V at contr ol terminal:
Fuse defective or total failur e
Reversing +/–:
always minimum luminous flux
Control signal range:
1 to 10V DC (voltage source in dimmable ECG)
Load capacity of the manual contr ol Maximum of 40 mA or a maximum of 50 dimmable ECG
unit for brightness control:
or 16 signal amplifiers DIM SA
Switching contact:
250 V/6 A (10 single-lamp or
5 two-lamp dimmable ECGs)
Fuse:
Fine fuse F500/H250
Cover and r otary button: From the Berker (2891), Gira (30900)
or Jung (240-10) range, as appropriate
Note: Control with a combination of two or more manual control units is not
possible.
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