| 摘要 |
<p>PROBLEM TO BE SOLVED: To lengthen the available life of a relay switch without using any preliminary relay switch. SOLUTION: A relay monitoring device 1 is provided with a switching circuit 5 for switching and connecting a plurality of loads 11 and 12 and a plurality of relay switches 8 and 9 and a microcomputer 10. The microcomputer 10 is allowed to function as a count means for individually counting the number of times of opening and closing of the respective relay switches 8 and 9 and as a switching control means for allowing the switching circuit 5 to switch when the count value of either the relay switch 8 or 9 reaches a prescribed value.</p> |
