IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200IC693ALG223驱动GE器140CRP93200
(4)输入输出组件(I/0模块)
I/0模块是CPU与现场I/0装置或其它外部设备之间的连接部件。PLC提供了各种操作电平与驱动能力的I/0模块和各种用途的I/0组件供用户选用。如输入/输出电平转换、电气隔离、串/并行转换数据、误码较验、A/D或D/A转换以及其它功能模块等。I/0模块将外界输入信号变成CPU能接受的信号,或将CPU的输出信号变成需要的控制信号去驱动控制对象(包括开关量和模拟量),以确保整个系统正常工作。
输入的开关量信号接在IN端和0V端之间,PLC内部提供24V电源,输入信号通过光电隔离,通过R/C滤波进入CPU控制板,CPU发出输出信号至输出端。PLC输出有三种型式:继电器方式、晶体管方式和晶闸管方式。
(5)编程器
编程器是用于用户程序的编制、编辑、调试检查和监视等。还可以通过其键盘去调用和显示PLC的一些内部状态和系统参数。它通过通讯端口与CPU联系,完成人机对话连接。编程器上有供编程用的各种功能键和显示灯以及编程、监控转换开关。编程器的键盘采用梯形图语言键符式命令语言助记符,也可以采用软件的功能键符,通过屏幕对话方式进行编程。
编程器分为简易型和智能型两类。前者只能连机编程,而后者既可连机编程又可脱机编程。同时前者输入梯形图的语言键符,后者可以直接输入梯形图。根据不同档次的PLC产品选配相应的编程器。
(6)外部设备
一般PLC都配有盒式录音机、打印机、EPR0M写入器、高分辨率屏幕彩色图形监控系统等外部设备。
(7)电源
根据PLC的设计特点,它对电源并无特别要求,可使用一般工业电源。
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