| 摘要 |
<p>PURPOSE:To automate operation for stopping a power supply device receiving commercial power supply by the stop of the commercial power supply and restoring the power supply device at the time of restarting the reception of the commercial power supply by detecting the supply or stop of the commercial power supply based upon contact information. CONSTITUTION:At the time of service interruption, a main control part 12 receives secondary power from an uninterruptive power supply (UPS) 4, turns on a holding relay 9 after executing necessary processing based upon the information of a primary power stop contact output 2 and stops power supply to a load circuit 13 through a device power supply 8. At the time of restoring service interruption, the UPS 4 supplies secondary power to the load device 13, turns off the contact 2 and turns on a primary power supply contact 3. Since the relay 9 is ON, action similar to the ON of a power supply ON switch 10 in the load device 13 is executed and the device power supply 8 can be applied. Then the main control part 12 turns off the relay 9 and normal operation status is restored, so that the load device 13 can be automatically raised.</p> |
