A06B-0345-B231FUANC

A06B-0345-B231FUANC A06B-0345-B231FUANC 

图1所示为FX2N-48MR的外部接线端子分布图。FX2N供电线路要求采用额定电压为AC100-AC240V，额定频率50/60Hz电源供电。AC电源应配线于L、N端子，电源线应采用在2.0mm²以上导线；主机上24V端子是PLC内部直流电源引出端，不能从外部接入电源；主机上“●”表示不使用的空端子，不能接线。

（1）输入回路

可编程控制器输入端的一次回路及二次回路间使用光耦合器做绝缘隔离，一般二次回路还设有RC滤波电路，防止输入端残余信号或外部噪声干扰。当某一输入端有信号输入时，内部电子回路导通，相应输入状态指示灯亮。一般多个输入端共同使用一个COM端子。FX2N的输入回路（外接一传感器）如图2所示。

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