The relay is an automatic switching element with an isolation function. When the change of the excitation amount in the input circuit reaches a prescribed value, the automatic circuit control device capable of causing a predetermined step change in the controlled power in the output circuit. So what are the functions of the relay as a control element?
1, integrated signal
For example, when a plurality of control signals are input to a multi-winding relay in a prescribed form, the comparison is integrated to achieve a predetermined control effect.
2, automatic, remote control, monitoring
For example, a relay on an automated device, together with other appliances, can form a program control circuit for automated operation.
3. Expand the scope of control
For example, when the time relay Xiaobian knows that the multi-contact relay control signal reaches a certain value, it can switch, disconnect, and turn on multiple circuits at the same time according to different forms of the contact group.
4, zoom in
For example, sensitive relays, intermediate relays, etc., can control very high power circuits with a very small amount of control.
Relays are widely used in remote control, telemetry, communications, automatic control, mechatronics and aerospace technology to control, protect, regulate and transmit information.

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