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產(chǎn)品簡(jiǎn)介
IC660BBD025
IC660BBD025
產(chǎn)品價(jià)格:¥400
上架日期:2018-11-13 10:02:50
產(chǎn)地:美國(guó)
發(fā)貨地:福建廈門(mén)
供應(yīng)數(shù)量:不限
最少起訂:1個(gè)
瀏覽量:221
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詳細(xì)說(shuō)明

    IC660BBD025

    IC660BBD025

    IC660BBD025

    IC660BBD025

    電機(jī)和緊急關(guān)斷閥的控制邏輯分別如下圖所示: 
      ① 如下圖所示,電機(jī)的控制方案為:在ESD中,由因果邏輯(C&E)產(chǎn)生電機(jī)的緊急關(guān)斷信號(hào),在PCS中,通過(guò)DMC模塊產(chǎn)生電機(jī)的手/自動(dòng)狀態(tài)選擇、切換;反饋指示;電機(jī)狀態(tài)指示;手動(dòng)啟/停;遠(yuǎn)程/就地選擇;手動(dòng)旁路等信號(hào),PCS信號(hào)通過(guò)MODBUS與ESD數(shù)據(jù)進(jìn)行鏈接,并與ESD關(guān)斷信號(hào)經(jīng)過(guò)相應(yīng)的邏輯運(yùn)算,共同完成對(duì)電機(jī)的控制,同時(shí)在PCS操作站上,通過(guò)調(diào)用DMC模塊的面板,組態(tài)電機(jī)的操作界面。



      ② 如下圖所示,緊急關(guān)斷閥的控制方案為:在ESD中,由因果邏輯(C&E)產(chǎn)生閥的緊急關(guān)斷信號(hào),在PCS中,通過(guò)DVC模塊產(chǎn)生閥的手/自動(dòng)狀態(tài)選擇;反饋指示;閥狀態(tài)指示;手動(dòng)開(kāi)/關(guān);ESD信號(hào)旁路;ESD信號(hào)復(fù)位;ESD信號(hào)組復(fù)位等信號(hào),這些信號(hào)通過(guò)MODBUS與ESD數(shù)據(jù)進(jìn)行鏈接,并與ESD關(guān)斷信號(hào)經(jīng)過(guò)相應(yīng)的邏輯運(yùn)算,共同完成對(duì)緊急關(guān)斷閥的控制,同時(shí)在PCS操作站上,通過(guò)調(diào)用DVC模塊的面板,組態(tài)閥的操作界面。


      根據(jù)控制邏輯,下圖所示的是一個(gè)常開(kāi)型ESD閥的典型回路圖,在具體組態(tài)中,根據(jù)工藝控制的需要,會(huì)有幾十種不同的典型回路圖。

      
      F&G系統(tǒng)完成油氣區(qū)的可燃?xì)怏w、毒性氣體(H2S)的檢測(cè)和消防。消防系統(tǒng)由現(xiàn)場(chǎng)安裝的火焰探頭、毒氣(H2S)探頭、可燃?xì)怏w探頭、煙霧探頭;手動(dòng)報(bào)警站、聲/光報(bào)警器;水噴淋,泡沫噴淋和CO2噴射裝置;就地單元控制器(小型PLC系統(tǒng))及控制系統(tǒng)構(gòu)成。F&G系統(tǒng)的基本邏輯為:根據(jù)探頭的監(jiān)測(cè)信號(hào),完成火災(zāi)或毒氣泄漏邏輯判斷并報(bào)警,根據(jù)火警發(fā)生的位置,啟動(dòng)相應(yīng)的消防設(shè)施,在工藝區(qū)啟動(dòng)水噴淋系統(tǒng),在儲(chǔ)罐區(qū)啟動(dòng)水噴淋和泡沫噴淋,在變電站及室內(nèi)無(wú)人職守區(qū),啟動(dòng)CO2噴射裝置。消防水系統(tǒng)的壓力維持在8公斤,設(shè)充壓泵自動(dòng)維持壓力,消防泵為電動(dòng)/柴油雙驅(qū)動(dòng),CO2氣瓶設(shè)泄漏自檢設(shè)施(為重力平衡機(jī)構(gòu))。F&G系統(tǒng)的模擬信號(hào)具有線路診測(cè)功能,開(kāi)關(guān)信號(hào)采用常閉信號(hào),設(shè)開(kāi)路報(bào)警并加線路檢測(cè)報(bào)警,確保系統(tǒng)的可靠性。


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