Relay Description

Relay (English name: relay) is an electrical control device that causes a predetermined step change in the controlled variable in the electrical output circuit when the input quantity (excitation quantity) changes to meet the specified requirements. It has an interactive relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). Usually used in automation control circuits, it is actually an "automatic switch" that uses low current to control high current operation. Therefore, it plays a role in automatic regulation, safety protection, and circuit conversion in the circuit.