| 摘要 |
PURPOSE: A circuit of releasing a door lock is provided to monitor a device having a door lock easily employing a forcing switch operating the system normally even when the door is open. CONSTITUTION: In a circuit of releasing a door lock, a switch(40) switches corresponding to the distance of a magnet. a forcing switch(50) is connected in parallel with the switch(40). As the forcing switch(50) is connected in parallel, when either the switch(40) and the forcing switch(50) is on, the system is on. Only when a magnet(42) and the switch(40) is separated enough and the forcing switch is off simultaneously, the system is off. So even when the door is open, if the system checker turns on the forcing switch(50), the system becomes on, thereby the system checker can monitor the condition of operation stably.
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