Hartland Controls CON-AUX600 1 NO/1 NC Auxiliary Switch for 3-Pole Contactor

Hartland Controls CON-AUX600 3-Pole Contactor Auxiliary Switch is an electrical part in control systems to give a secondary signal feedback of a main contactor. It works by switching the condition of its normally open and closed contacts depending on the operation of the contactor, allowing secondary circuits to be monitored or controlled. This switch is commonly used together with a contactor in air conditioning, heat pumps and packaged equipment. It is used in the HVAC systems to provide control logic interlocks, communicating contactor status to control boards.