Relays in automotive circuits have the following functions:
1. Enlarge the control range: For example, when the control signal of the multi-contact relay reaches a certain value, the multi-circuit can be switched, disconnected and connected at the same time according to different forms of the contact group.
2. Amplification: For example, sensitive relays, intermediate relays, etc., can control very large power circuits with a very small amount of control.
3. Comprehensive signal: For example, when multiple control signals are input to a multi-winding relay in a prescribed form, after a comprehensive synthesis, a predetermined control effect is achieved.
4, automatic, remote control, monitoring: For example, the relay on the automatic device and other electrical appliances can form a program control circuit to achieve automatic operation.