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消防输入输出模块中，那两根从被控设备中反馈到模块中的反馈线，是不是一根无源常开线，一根无源常闭线。
消防输入输出模块中，那两根从被控设备中反馈到模块中的反馈线，是不是一根无源常开线，一根无源常闭线。
2025-03-15 10:09:33
推荐回答（1个）
回答1：
不是的 一般输入模块接收的是无源常开反馈信号 就是外部设备动作后给输入模块一对闭合信号 相当于开关闭合
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