Description
测量输入或输出端子板两端电压测量值正确,模块不响应,则应更换模块。若更换后仍无效,则可能是现场连接出问题了。输出设备截止,输出端间电压达到某一预定值,就表明现场连线有误。若输出器受激励,且LED指示器不亮,则应替换模块。
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