There are 2 standard output unit types for a C-Bus output; Relays or Dimmers, both
come in various models, some of the options are-
Dimmers - DIN mount, High Power ( 5,10,20 Amp)
Relays - DIN Mount, High power ( 20Amp), Changeover.
Most ( not all ) output units will also have the option for "built-in " C-Bus power
supply or not.
This option must be specified when ordering the product ( it cannot be retro-fitted ).
For further information please view the documents below for unit specifications.
Relays Specification Chart Dimmers Specification Chart | 
