Base support for Busch-priOn® for holding and contacting rotary control element (6341-xxx-101), 1-way control element (6340-xxx-101), 3-way control element (6342-xxx-101), flush-mounted monitor (6345-xxx-101), standard end strip top (6348-xxx-101), standard end strip bottom (6349-xxx-101), end strip IR and proximity top (6350-xxx-101), end strip display, RTR, IR and proximity (6351-xxx-101 or 6351/08-xxx-101) and end strip bottom temperature sensor (6352-xxx-101). For contacting with power bus coupler 6120/13. For contacting with power mains coupler 6920/13.