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IC693PWR322

IC693PWR322

PLC的硬件主要由*處理器（CPU）、存儲(chǔ)器、輸入單元、輸出單元、通信接口、擴(kuò)展接口電源等部分組成。其中，CPU是PLC的核心，輸入單元與輸出單元是連接現(xiàn)場輸入/輸出設(shè)備與CPU之間的接口電路，通信接口用于與編程器、上位計(jì)算機(jī)等外設(shè)連接。

對(duì)于整體式PLC，所有部件都裝在同一機(jī)殼內(nèi)，其組成框圖如圖1所示；對(duì)于模塊式PLC，各部件獨(dú)立封裝成模塊，各模塊通過總線連接，安裝在機(jī)架或?qū)к壣希浣M成框圖如圖2所示。無論是哪種結(jié)構(gòu)類型的PLC，都可根據(jù)用戶需要進(jìn)行配置與組合。

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