描述
电缆的各导线间都存在电容,合格的电缆能把此容值约束在一定范围以内。即是合格的电缆,当电缆长度超越一定长度时,各线间的电容容值也会超越所请求的值,当把此电缆用于PLC输入时,线间电容就有可能导致PLC的误动作,会呈现很多无法了解的现象
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