Connection Schematics - ABB i-bus KNX Product Manual

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ABB i-bus KNX
2.2.2

Connection schematics

© 2008 ABB STOTZ-KONTAKT GmbH
Device technology
LR/S 2.16.1
1 Label carrier
2 Programming button
3 Programming LED
4 Bus terminal connection
5 Switch position display
and manual operation
6 Load circuits
7 Control circuits
Note
When positioning the Light Sensor in the room it is important to ensure
that the individual control circuits do not interfere with one another.
The Light Sensor should be mounted above the area in which the
actual lighting intensity is to be measured.
The luminaries or sunlight may not shine directly into the brightness
sensor. Pay attention to unfavourable reflections for example from
mirrored or glass surfaces.
The white fibre-optic rod can limit the detection range and reduce
the lateral lighting sensitivity to external lighting sources.
If the Light Sensor is not connected to the Light Controller LR/S,
a DC voltage of a few mV can be measured directly with a multi-function
measurement device. The measured value is between 0 mV (absolute
darkness) and a few 100 mV depending on the brightness. If 0 V is also
measured at normal brightness, this is due to an open circuit, short circuit
or inverse polarity fault or a defective sensor.
LF/U 2.1
8 Light sensor inputs LF/U 2.1
9 Light sensor LF/U 2.1
10 FM switch box
11 Shielded sensor cable
12 Cover
13 Fixing screw
14 Light sensor rod
16