ASE2UDC920AE01 3BHB022793R0001 控制模块 DCS PLC系统

ASE2UDC920AE01 3BHB022793R0001 控制模块 DCS PLC系统

ASE2UDC920AE01 3BHB022793R0001 控制模块 DCS PLC系统

ABB ASE2UDC920AE01 3BHB022793R0001模块了解完输入端可以接哪些元件和一个回路需要具备的三要素，下面用三菱FX3UPLC和一个电源（一般用24V电源，具体看说明书）来讲解，如何把这些元件接在PLC输入端（如下图）。

输入端两线接法：

①首先把每个X点输入端内部当成一个小灯泡，方便理解。小灯泡的一端全部并在S/S公共端上。

②然后把按钮开关一端接到X3输入端子上（并在同一个公共端的X点都可以），按钮另外一端接外部电源负极。

③最后外部电源正极接在S/S端子上。

分析一下，电源从正极流向S/S，经过灯泡，再经过开关流回电源负极。

两线的开关接线就是如此简单。但是需要注意的是：磁性开关两线有分棕色和蓝色线，棕正蓝负。（接线的时候注意电源电流方向，电源从正极流向S/S再经过X点，棕色线接X端，蓝色线接在电源负极。）

另外，PLC公共端S/S端子接电源正极称为漏型接法，接电源负极称为源型接法。（当公共端S/S接电压负极，磁性开关的蓝色线接X点，棕色线接电压正极）

ASE2UDC920AE01 3BHB022793R0001 控制模块 DCS PLC系统

ABB ASE2UDC920AE01 3BHB022793R0001 module to understand the input can be connected to what components and a loop needs to have the three elements, the following with Mitsubishi FX3UPLC and a power supply (generally with 24V power supply, see the instructions for details) to explain, How to connect these components to the PLC input (figure below).

Input two-wire connection:

① First of all, treat the inside of each X point input as a small light bulb for easy understanding. One end of the small bulb is all over the S/S common end.

② Then connect one end of the button switch to the X3 input terminal (and X point on the same common end can be), and connect the other end of the button to the negative terminal of the external power supply.

③ Finally, the positive terminal of the external power supply is connected to the S/S terminal.

Analyze, the power flow from the positive terminal to S/S, through the bulb, and then through the switch flow back to the negative terminal of the power supply.

A two-wire switch connection is as simple as that. However, it should be noted that the magnetic switch two lines have brown and blue lines, brown positive blue negative. (Pay attention to the direction of the power supply current when wiring, the power supply flows from the positive terminal to S/S and then through the X point, the brown line is connected to the X end, and the blue line is connected to the negative terminal of the power supply.)

In addition, the PLC common S/S terminal connected to the positive terminal of the power supply is called the leakage connection, and the negative terminal of the power supply is called the source connection. (When the common end S/S is connected to the negative voltage pole, the blue line of the magnetic switch is connected to the X point, and the brown line is connected to the positive voltage pole)