With adapters for switch series, radio actuators can be easily integrated into existing installations from various manufacturers and designs without significant costs or installation effort. Existing switches can be replaced by Homematic or Homematic IP radio actuators if the wiring is suitable. The adapter for Busch Jaeger switch series allows the integration of the following switch series: Duro 2000 SI/SI Linear, Reflex SI/SI Linear, Carat, Future Linear, Solo, Busch Axcent, and Alpha.