| 摘要 |
A power control circuit ( 120 ) is driven by electric power supplied from a controller ( 200 ) as an external device via a cable ( 150 ), and controls opening/closure of a switch ( 104 ) in accordance with instructions from the controller ( 200 ). A DC power supply ( 105 ) converts an AC voltage supplied via the switch 104 into a DC voltage and provides it to individual units such as a reader ( 140 ).
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