基于西门子PLC的声光报警电路

xiandai nongcun keji(2019)

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Abstract
声光报警电路是现代化自动控制系统中重要的一个环节,基于西门子 LC的声光报警电路解决了故障发生问题.声光报警包括声音报警和灯光报警两部分,当故障发生时,蜂鸣器鸣响同时故障指示灯闪烁.按下消铃按钮消去蜂鸣器,故障指示灯变为常亮,直到故障消失后,故障指示灯变为熄灭.
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