ABB CA4-22M Auxilary Contact Block

The ABB CA4-22M Auxiliary Contact Block adds supplementary switching contacts to a contactor or motor starter, extending the control circuit's ability to monitor operational status, interlock multiple parts, or trigger secondary operations based on the main contactor's position. Two normally open and two normally closed contacts operate in tandem with the host contactor's coil, changing state simultaneously when the main power poles are pulled in or released. Mounted directly onto compatible ABB contactors used in compressor panels, air-handling equipment, and motor control assemblies across HVAC systems, it clips onto the contactor body through a side-mount interface.