The PLC interlock program and the relay (contactor) hardware interlock have the same logic function, that is, B cannot act when A acts, and A cannot act when B acts.
The self-locking of PLC and the interlocking program of PLC can realize the basic programs of many automation equipment, such as automatic material transport trolley, motor forward and reverse rotation, safety limit function and so on.
Relay/Contactor interlock circuit wiring, • Relay/Contactor interl...
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