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IC693MAL645D

IC693MAL645D

人/機接口裝置是用來實現(xiàn)操作人員與PLC控制系統(tǒng)的對話。zui簡單、zui普遍的人/機接口裝置由安裝在控制臺上的按鈕、轉換開關、撥碼開關、指示燈、LED顯示器、聲光報警器等器件構成。對于PLC系統(tǒng)，還可采用半智能型CRT人/機接口裝置和智能型終端人/機接口裝置。半智能型CRT人/機接口裝置可*安裝在控制臺上，通過通信接口接收來自PLC的信息并在CRT上顯示出來；而智能型終端人/機接口裝置有自己的微處理器和存儲器，能夠與操作人員快速交換信息，并通過通信接口與PLC相連，也可作為獨立的節(jié)點接入PLC網絡。 

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