接近PLC是否方便?在一-些应用中，PLC被当作远程站从而不易去接近安全条例。一些用户有在正常供电期间不允许替换电池的安全规程.:如何使用PLC?是–直供电或者每天都要关闭PLC?参看标题为“影响电池使用寿命的因素

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