1769-PA4 A-B 常开触点

A-B 1746-NT8
A-B 1756-0B32
A-B 1756-0B32
A-B 1756-IF16
A-B 1756-IF16
A-B 1746-NO4V
A-B 1746-IA8
A-B 1756-IM16I/A
A-B 1756-IF16/A
A-B 1756-OF6CI/A
A-B 1756-IF16
A-B 1756-IF8
A-B 1746-C9

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Description

在该执行机构开始动作时起动设定值为12s的定时器定时,若12s后还没有收到动作结束的信号,由定时器的常开触点发出故障信号,该信号停止正常的程序,起动报警和故障显示程序,使操作人员和维修人员能迅速判别故障的种类,及时采取排除故障的措施。

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