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the DALI ballasts must be get numbers and be assigned to the illumination channels, this has to be done on the ProfiLux itself

see chapter 6.12 DALI in the prgramming guide

I must admit it is not easy to understand what you've written here

the DALI-ballasts are connected correctly

did you assign numbers to the DALI-ballasts?

is this the problem: the DALI...

as written in the PLM-DALI manual:

just connect the 2 control outputs of the DALI-card with the control inputs of your DALI-ballast, all devices in a DALI network are connected in parallel