two electric motors for sequential parking circuit

Published:2011/7/10 20:19:00 Author:John | Keyword: electric motor, sequential parking | From:SeekIC

In some working procedures, it is required to part the first motor and followed to park another motor. The figure shows the circuit of adapting to run the program. When the starting button ST1 is pressed, motor M1 operates. Then, the ST2 is pressed to pull KM2, leading to the operation of motor M2. Due to the KM2's pull, its normally opening contact is self-locked and the other contact closes to short the stop button STP1. Therefore, if the STP1 is pressed by mistake, KM1 will not lose power and release it. And the motor M1 will not stop at this time. Only the STP2 is pressed firstly to stop the motor M2 can the KM2 lose power. Then, its normally opening contacts release. Only under this situation can it is possible to stop M1 by pressing STP1.



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