TK821F电源模块

20F1ANF212AN0NNNNN

MPMAABED2A0B8S2C

20DC170A0ENNANASE

（3）输入输出模块 可编程序控制器是一种工业控制计算机系统，它的控制对象是工业生产过程，与DCS相似，它与工业生产过程的联系也是通过输入输出接口模块(I/O)实现的。I/O模块是可编程序控制器与生产过程相联系的桥梁。 PLC连接的过程变量按信号类型划分可分为开关量（即数字量）、模拟量和脉冲量等，相应输入输出模块可分为开关量输入模块、开关量输出模块、模拟量输入模块、模拟量输出模块和脉冲量输入模块等。 （4）编程器 编程器是PLC的重要外部设备。编程器将用户所希望的功能通过编程语言送到PLC的用户程序存储器中。编程器不仅能对程序进行写入、读出、修改，还能对PLC的工作状态进行，同时也是用户与PLC之间进行人机对话的界面。随着PLC的功能不断增强，编程语言多样化，编程已经可以在计算机上完成。

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