Working principle of relay.
2026-04-15
When the relay module is working, the electromagnetic iron is energized, which pulls down the armature to make contact between D and E, and the working circuit is closed. When the electromagnet loses its magnetism, the spring pulls up the armature and cuts off the working circuit. Therefore, a relay is a switch that uses an electromagnet to control the on/off of a working circuit.The benefits of u...