| 摘要 |
A mail-processing machine including an electrical power supply for powering at least one control motor, and a safety locking circuit electrically connected to a cover switch of the machine and co-operating with the electrical power supply to switch the power supply off whenever the cover of the machine is open. The machine includes a chopper electrical power supply comprising at least one power chopper circuit having a control circuit. The safety locking circuit includes at least one electromechanical relay electrically connecting the power chopper circuit to its control circuit, and constituting an integrated on/off mechanism that is approved, cheap, and very compact.
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