1747-M11 AB

1747-M11 AB 

I/O模塊

    PLC與電氣回路的接口，是通過輸入輸出部分（I/O）完成的。I/O模塊集成了PLC的I/O電路，其輸入暫存器反映輸入信號狀態(tài)，輸出點反映輸出鎖存器狀態(tài)。輸入模塊將電信號變換成數(shù)字信號進入PLC系統(tǒng)，輸出模塊相反。I/O分為開關量輸入（DI），開關量輸出（DO），模擬量輸入（AI），模擬量輸出（AO）等模塊。

    開關量是指只有開和關（或1和0）兩種狀態(tài)的信號，模擬量是指連續(xù)變化的量。常用的I/O分類如下：

    開關量：按電壓水平分，有220VAC、110VAC、24VDC，按隔離方式分，有繼電器隔離和晶體管隔離。

    模擬量：按信號類型分，有電流型（4-20mA,0-20mA）、電壓型（0-10V,0-5V,-10-10V）等，按精度分，有12bit,14bit,16bit等。

    除了上述通用IO外，還有特殊IO模塊，如熱電阻、熱電偶、脈沖等模塊。

    按I/O點數(shù)確定模塊規(guī)格及數(shù)量，I/O模塊可多可少，但其zui大數(shù)受CPU所能管理的基本配置的能力，即受zui大的底板或機架槽數(shù)限制。　　

廈門莫格電氣自動化有限公司

：

：張美霞

電  話：/  

傳  真：

地  址: 廈門市思明區(qū)檳榔西里197號第四層B19單元

http://www.mogget。。ｃｎ/

 
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