Description
PLC内部总线相连，同时为了安全也有电气隔离功能。模拟量输入（A／D）模块是将现场由传感器检测而产生的连续的模拟量信号转换成PLC内部可接受的数字量；模拟量输出(D／A)模块是将PLC内部的数字量转换为模拟量信号输出。
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