1. What is a general purpose relay A general-purpose relay refers to a relay that can be used in a certain field or in many fields. The relay is used to make the controlled quantity happen in the electrical output circuit when the change of the input quantity (excitation quantity) reaches the specified requirements. An electrical appliance for step change.

General purpose relay function

Relay is an automatic switching element with isolation function. It is widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment. It is one of the most important control elements. Relays generally have certain input variables ( Such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light, etc.) induction mechanism (input part); there is an actuator (output part) that can realize "on" and "off" control of the controlled circuit ; Between the input part and the output part of the relay, there is also an intermediate mechanism (drive part) that couples and isolates the input quantity, processes the function and drives the output part.

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

1. Expand the control range: For example, when the control signal of the multi-contact relay reaches a certain value, it can switch, break, and connect multiple circuits at the same time according to different forms of the contact group.

2. Amplification: For example, sensitive relays, intermediate relays, etc., can control high-power circuits with a very small amount of control.

3. Integrated signal: For example, when multiple control signals are input to the multi-winding relay in a specified form, the predetermined control effect is achieved after comparison and synthesis.

4. Automatic, remote control, monitoring: For example, the relay on the automatic device can form a program control circuit together with other electrical appliances to realize automatic operation.