Main relay function

Main function

Relay is one of the most important control elements, which is widely used in remote control, telemetry, communication, automatic control, electromechanical integration and power electronic equipment.

The relay generally reflects the input variables (such as current, voltage, power, frequency, impedance, temperature, pressure, speed and light) of the induction mechanism (input); to the controlled circuit is "open" and "off" control actuator (output) between the input part; and the output part of the relay, and are coupled to the input isolation function, processing and intermediate drive on the output part (driver).

As a control element, to sum up, the relay has the following functions:

1) to expand the scope of control: for example, when the control signal of the multi contact relay reaches a certain value, it can be connected, disconnected and connected with the multiplex circuit according to the different forms of the contact group.

2) amplification: for example, a sensitive relay, intermediate relay, etc., with a very small amount of control, can control a large power circuit. Relay manufacturers

3) integrated signal: for example, when a number of control signals in accordance with the provisions of the input multi winding relay, after a comprehensive comparison, to achieve the desired control effect.

4) automatic, remote control, monitoring: for example, the automatic device relay and other electrical appliances together, can form a program control circuit, so as to achieve automatic operation.