A06B-6058-H325

A06B-6058-H325

A06B-6058-H325

（1）单端共点（Comcon）数字量输入方式 为了节省输入端子，单端共点输入的结构是在 PLC 内部将所有输入电路（光电耦合器）的一端连接在一起接到标示为 COM 的内部公共端子，各输入电路的另一端才接到其对应的输入端子 X0、X1、X2、.... com 共点与 N 个单端输入就可以做 N 个数字量的输入（N+1 个端子），因此我们称此结构为"单端共点"输入。

用户在做外部数字量输入组件的接线时也需要同样的做法，需要将所有输入组件的一端连接在一起，叫输入组件的的外部共线；输入组件的另一端才接到 PLC 的输入端子 X0、X1、X2、.... SINK输入方式，可接 NPN 型传感器，即 X 端口与负极相连。 SRCE输入方式，可接 PNP 型传感器。即 X 端口与整机极相连。 （外部输入组件可以为按钮开关、行程开关、舌簧开关、霍尔开关、接近开关、光电开关、光幕传感器、继电器触点、接触器触电等开关量的元件。） （2） SINK（sink Current 拉电流）输入方式●单端共点SINK输入接线（内部共点端子COM→24V+，外部共线→24V-）。

A06B-6058-H325 

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