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Relay control relays form a self-locking interlock circuit how to complete
May 06, 2018

Self-locking: The relay's normally open electric shock and the control relay coil's switch are connected in parallel;

Interlocking: Each relay of the two relays is normally connected in series with the coil of another relay

Self-locking is the use of relay normally open contact in parallel to the start button, press the start button contactor to pull, normally open contact conduction then release the button current from the contact conduction, can achieve self-locking.

The interlock is to connect the A coil to the normally closed contact of B. When B is closed, the contact is normally closed and the A coil cannot be closed again. Only when B is off, can the A coil be turned on after its normally closed contact is turned on.