This series of industrial grade solid-state relays is a contactless on-off electronic switch, with two terminals for input control and the other two for output control. The middle uses photoelectric isolation, and the input and output uses photoelectric coupling. By adding a DC or pulse signal to the input terminal, the output terminal can transition from a off state to a on state (blocked when there is no signal), thereby controlling a larger load.

This series of industrial grade solid-state relays is a contactless on-off electronic switch, with two terminals for input control and the other two for output control. The middle uses photoelectric isolation, and the input and output uses photoelectric coupling. By adding a DC or pulse signal to the input terminal, the output terminal can transition from a off state to a on state (blocked when there is no signal), thereby controlling a larger load.