| 摘要 |
A DC(Direct Current) power supply control circuit with multiple control inputs is provided to reduce trouble making components by separating grounds of a power supply control unit and a system from each other. A DC power supply control circuit with multiple control inputs includes multiple control inputs, a power supply, a self locking unit, and a power cut-off unit. The multiple control input units include multiple switches, and output on and off signals(10,11) by using electrical pulses generated in the switches as an input signal. The power supply supplies power to loads(5,13,14) by driving a first relay(1) only when receiving the on signal from the multiple control input units. The self-locking unit stably supplies DC power to the loads when a contact of the first relay is short-circuited. The power cut-off unit maintains an opened state only when receiving the off signal from the multiple control input units.
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