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Constant light switch
In contrast to the constant light switch, there is the possibility of switching in several stages.
Both the constant light controller and the constant light switch ensure that the level of brightness
in the room does not drop below the desired level. However, the brightness controller is
additionally able to send telegrams for dimming lamps to the KNX bus. This enables a constant
level to be attained due to the dimming of lights brighter and darker, always in dependence of
the natural light in the room. And the accuracy of the control increases with the operating time.
The constant light controller remembers the luminosity of the lamps used, it measures this
continuously (see also chapter 7.2.6, 'Information on calibrating the internal light controller).
That is why the lights used later must also be used during commissioning of the presence
detector with the constant light controller function. The artificial light component relative to
daylight is also determined during commissioning. Next to the brightness the constant light
controller also responds to the presence of persons in the room. This function can also be
operated with 2 light rows.
Ix
Fig. 4:
Constant light controller influences
[1] Natural light
[2] Brightness in the room
[3] Parametrized brightness-value threshold
[4] Artificial light
KNX Technical Manual 2CKA001473B8667 │ 06.02.2017
Product description
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