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ABB i-bus® KNX
Lighting Control

Light Controller, 1-10 V, MDRC
The device enables the switching and dimming of 2 or 4 independent lighting circuits in con-
junction with electronic ballasts. In combination with the Light Sensor LF/U 2.1, the device
can be used for constant lighting control. 2 or 4 light sensors can be connected to the con-
troller for precise detection of the lighting conditions.

Description Mod. Order details Price Weight Pack
LR/S 4.16.1 width 1 piece 1 piece unit
Type code Order code kg pc.
2-fold 4 LR/S 2.16.1 2CDG110087R0011 0.25 1
4-fold 6 LR/S 4.16.1 2CDG110088R0011 0.40 1

Light Sensor, FM
Used for implementing constant lighting control applications in conjunction with light con-
trollers LR/S, LR/M, DLR/S 8.16.1M or DLR/A 4.8.1.1. The scope of delivery includes different
optical rods, the connection terminals and the cover for discrete fitting in a room.

LF/U 2.1
Description Mod. Order details Price Weight Pack
width 1 piece 1 piece unit
Type code Order code kg pc.
– LF/U 2.1 2CDG110089R0011 0.07 1

Switch/Dim Actuator, 16 A, MDRC
Used for switching and dimming of 2, 4 or 8 independent groups of luminaries with elec-
tronic ballasts with 1 – 10 V control interfaces. On each channel the power supply of the bal-
lasts is switched by a floating load relay (16 A – AC1). Every output can be operated manually
and features display of the switching state. The device can assume a range of applications
thanks to the programming options. The switching load is identical to the SA/S x.16.2.1
range (see Standard Outputs – Overview). 14
SD/S 8.16.1

Description Mod. Order details Price Weight Pack
width 1 piece 1 piece unit
Type code Order code kg pc.
2-fold 4 SD/S 2.16.1 2CDG110079R0011 0.21 1
4-fold 6 SD/S 4.16.1 2CDG110080R0011 0.32 1
8-fold 8 SD/S 8.16.1 2CDG110081R0011 0.56 1