2711-B5A2/B
2711-B5A2/B
2711-B5A2/B
7、 什么是I/O單元?
通常，一個過程控制站是有幾個機架組成，每個機架可以擺放一定數(shù)量的模塊。CPU所在的機架被稱為CPU單元，同一個過程站中只能有一個CPU單元，其他只用來擺放I/O模塊的機架就是I/O單元。
8、I/O單元和CPU單元是如何連接的?
I/O單元與CPU是通過現(xiàn)場總線連接的。
9、 什么是現(xiàn)場總線?
現(xiàn)場總線是應(yīng)用于過程控制現(xiàn)場的一種數(shù)字網(wǎng)絡(luò)，它不僅包含有過程控制信息交換，而且還包含設(shè)備管理信息的交流。通過現(xiàn)場總線，各種智能設(shè)備(智能變送器、調(diào)節(jié)法、分析儀和分布式I/O單元)可以方便地進行數(shù)據(jù)交換，過程控制策略可以完全在現(xiàn)場設(shè)備層次上實現(xiàn)。目前，使用較多的現(xiàn)場總線主要是FUNDATION fieldbus基金會現(xiàn)場總線(FF總線)和PROFIBUS現(xiàn)場總線。應(yīng)用現(xiàn)場總線技術(shù)可以將各種分布在控制現(xiàn)場的相關(guān)智能設(shè)備和I/O單元方便的連接在一起，構(gòu)成控制系統(tǒng)，這種結(jié)構(gòu)已經(jīng)成為DCS發(fā)展的趨勢。
【公 司】： 福建鴻飛達自動化科技有限公司
【主 營】： AB(羅克韋爾)PLC全系列、ABB機器人系統(tǒng)備件、施耐德140/TSX、西門子6SN/6FC、伺服系統(tǒng)全套等
【價 格】： 電議
【發(fā)布人】： 程先生
【電 話】： 15306977024 13625073704
【所在地】： 福建 - 福州
【坐 機】： 0591-83532940
【Q Q】： 2851617309
【傳 真】： 0591-88263940
【郵 箱】： 2851617309@qq.com
產(chǎn)品價格以電話或者QQ詢價為準，發(fā)布價格不做參考，圖片也一樣
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