1746-IM8
1746-IM8
6、 I/O是什么？
控制系统需要建立信号的输入和输出通道，这就是I/O。DCS中的I/O一般是模块化的，一个I/O模块上有一个或多个I/O通道，用来连接传感器和执行器（调节阀）。
7、 什么是I/O单元？
通常，一个过程控制站是有几个机架组成，每个机架可以摆放一定数量的模块。CPU所在的机架被称为CPU单元，同一个过程站中只能有一个CPU单元，其他只用来摆放I/O模块的机架就是I/O单元。
8、I/O单元和CPU单元是如何连接的？
I/O单元与CPU是通过现场总线连接的。
现货，现货，降降降，火火火，火火火……
现货，现货，降降降，火火火，火火火……
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