Schneider KNX - Universal Dimmer Master 2 channel- MTN6710-0102

Can be installed in combination with the dimmer extension  (to obtain dimmable 4 or 6 outputs ):

Schneider KNX - Universal Dimmer 2 channel - extension - MTN6810-0102

Can be installed in combination with the extension switch-blind actuator (to obtain dimmable 2 outputs and  8 or 16 switch-blind outputs):

Schneider KNX - Switch-blinds actuator 8 outputs - extension - MTN6805-0008

Can be installed in combination with the extension switch-blind actuator and Universal Dimmer 2 channel - extension(to obtain dimmable 4 outputs and  8  switch-blind outputs):

 If your extension is not side by side with the master or the second extension you can use this cable:

Schneider KNX Cable flexible

SpaceLogic KNX Universal Dimming Master. Dimming actuator with 2 channels for switching and dimming dimmable LED lamps, incan -descent lamps, HV halogen lamps, LV halogen lamps using dimmable wound transformers or electronic transformers or dimmable compact fluorescent lamps. (leading and trailing-edge phases)