| 摘要 |
PROBLEM TO BE SOLVED: To provide a load driving circuit capable of simplifying and miniaturizing the circuit structure and having high reliability. SOLUTION: A normal interrupting switch for directly continuing/interrupting the current and an emergency interrupting switch for forcibly interrupting the load current at the time of emergency are interposed in series to a load supplying circuit 14. In this case, two contacts of a first and a second operating contacts a1, a2 to be turned on at the time of excitation are provided, and an electromagnetic relay 20 having the structure that a distance between a movable contact and a fixed contact of the first operating contact a1 is shorter than a distance between a movable contact and a fixed contact of the second operating contact a2 is provided, and the first operating contact a1 is used for the emergency interrupting switch, and the second operating contacts a2 is used for the normal interrupting switch.
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