Art.-No.: 2095 LUX
2.3 Fitting and electrical connection
DANGER!
Electrical shock when live parts are touched.
Electrical shocks can be fatal.
Before working on the device, enable all the corresponding miniature circuit
breakers. Cover up live parts in the working environment.
DANGER!
When connecting the bus and mains voltage wires in a shared box, the KNX
bus line may come into contact with the mains voltage.
This endangers the safety of the entire KNX installation. People at remote
devices may also receive an electric shock.
Do not place bus and mains voltage cables together in a connection
compartment of the device (flush-mounted/surface-mounted box).
Selecting the installation location
The device measures the brightness on a work surface. Select the installation location such that
the work surface is recorded fully.
Light falling directly on the sensor or reflected by shiny surfaces causes incorrect measuring
results and impedes control. To ensure fault-free operation, the controller must only measure
diffused, reflected light.
i
When delivered, the light measurement is optimised for installation at a height of
2.50 m directly over a work surface of 0.75 m height with approx. 30 % reflection. With
differing situations, please calibrate the controller (see page 8).
i
The device is suitable for fixed installation in dry indoor areas.
o
Install the brightness controller directly above the work surface on the room ceiling
(picture 2).
picture 2: Rigid fibre-optic rod with straight incidence
H
Room height
a
Height of the work surface
ø
Diameter of the measuring surface: ø = (H – a) · 0.54
o
If installation is not possible directly over the work surface, then install the brightness
controller with a side offset (picture 3). The detection cone is then to the side of the surface
to be measured.
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Fitting, electrical connection and operation
