Control of the ballast’s is implemented via an interference resistant DC voltage signal of 10 V (sinking current) where:
i) 10 V = maximum brightness (open control line)
ii) 1 V = minimum brightness (control line fully loaded)
The 10 V DC control voltage is supplied from the ballast’s.
The maximum supply current is dependent on the ballast type and manufacturer and lies typically between 0.5 mA and 4 mA per ballast.Tags: KNX, Light Control, TP