| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable the control system of the other system to guarantee operation regarding power-OFF control even if one system gets out of order by multiplying an opening/closing detection part and a control circuit concerned in the power-OFF control. SOLUTION: The opening/closing detection part 13 (131, 132), cutoff control parts 21 and 22, and a main output control part in a power unit 15 are all doubled. The doubled cutoff control parts 21 and 22 receive opening/closing signals of a housing cover from the opening/closing detection parts 1 (131) and 2(132) and supply signals to the main cutoff part 151 and main inverter part 153 of the power unit 15 respectively to control the main cutoff part 151 and main inverter 153, thereby cutting off the main output of the power unit 15. In this case, AC input is controlled with signals from the main cutoff part 21 and a power-ON control part 23 to perform cutoff control over the main output. Then cutoff control part operation signals are outputted from the cutoff control parts 21 and 22 and displayed on display units 24 and 25.</p> |
