What is the role of intermediate relays? Used in what circuit.
Intermediate relay is mainly used in the control circuit, its role is mainly composed of control relay disk, the control of the role of the circuit.
The main function of the intermediate relay is the signal detection, transmission, transformation or processing, it is usually off the circuit current is usually small, that is generally used in the control circuit (with the "main circuit" contrast)
If a main circuit operating current is small, then the intermediate relay can be used as the main circuit breaker device. The relay is used as a contactor
Hope to help you!
As the name suggests, it is the relay role. In the previous electronic control circuit, mostly by the weak part of the control signal generated by the strong implementation of electricity, in order to increase the safety of weak, often increase the level of search relay. Play a transitional role. Now a large number of microprocessors used in the control circuit, we know that microcomputer is sometimes very fragile. But also to use relay. I give an example, now control the circuit used in the PLC, which each has been installed inside the output of a relay, in practical applications, in order to increase the safety of the PLC, but also add a relay, namely: PLC control Relay coil, relay contact control contactor coil, this can be better to achieve strong, weak security isolation
