GE IS200PMCIH1ABA

制造商：通用电气 系列：MKVI 功能：相位接口板 将一台或多台PLC接入PC系统，PC起到原始编程器和人机界面操作站的作用。这是20世纪90年代的新趋势，为系统集成带来商机。同时还开发了编程软件和人机界面软件（监控软件或组态软件）和软件接口（或驱动软件）。 近年来，PLC厂家在原有CPU模板上提供物理层RS232/422/485接口的基础上，逐步增加了各种通讯接口，提供了完整的通讯网络。由于近年来数据通信技术的快速发展，用户对开放性的需求强烈，加上现场总线技术和以太网技术的同步发展，由PLC组成的PCS系统在开放性方面略优于DCS。目前，Rockwell AB已形成多层结构体系，即Ethernet、Control Net、Device Net、Asi等现场总线（原有的DH+网络也兼容）。除了Profibus DP通信网络和Profibus FMS网络之外，西门子还提出了S7路由网络，它是Profibus DP和工业Enternet的两层结构。

The communication module of the programmable controller is equivalent to the network interface in the local area network. The communication module data bus is connected with the host of the programmable controller, and the communication protocol is realized by hardware and software together. The communication module of the programmable controller is generally equipped with several interfaces, which can be selected through the selection switch on the communication module to realize the communication with other programmable controllers, intelligent control devices or computers.

The input module is used to receive and collect the input signal. The input signal has two types: one is the switch input signal provided by the button switch, the stroke switch, the digital dip switch, the proximity switch, the photoelectric switch, the pressure relay, etc. The other is a continuously changing analog input signal sent by potentiometer, thermoelectric, tonometer motor, and various transmitters. The input module also needs to convert these different level signals into digital signals that the CPU can receive and process.

The function of the output module is to receive the digital signal processed by the central processor, and convert it into a signal that can be received by the field executive parts, which is used to control the contactor, solenoid valve, regulating valve, speed regulating device, etc. Another type of load control is the indicator light, digital display and alarm device.

离散输入模块

开关量输入模块从输入设备（如传感器、按钮和开关这些可以具有两种状态—开/关的装置）接收信号。模块需要一个底座（IC200CHSxxx）上 。

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