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，在PCS中，通過DMC模塊產(chǎn)生電機(jī)的手/自動狀態(tài)選擇、切換；反饋指示；電機(jī)狀態(tài)指示；手動啟/停；遠(yuǎn)程/就地選擇；手動旁路等信號，PCS信號通過MODBUS與ESD數(shù)據(jù)進(jìn)行鏈接，并與ESD關(guān)斷信號經(jīng)過相應(yīng)的邏輯運(yùn)算，共同完成對電機(jī)的控制，同時在PCS操作站上，通過調(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，在PCS中，通過DVC模塊產(chǎn)生閥的手/自動狀態(tài)選擇；反饋指示；閥狀態(tài)指示；手動開/關(guān)；ESD信號旁路；ESD信號復(fù)位；ESD信號組復(fù)位等信號，這些信號通過MODBUS與ESD數(shù)據(jù)進(jìn)行鏈接，并與ESD關(guān)斷信號經(jīng)過相應(yīng)的邏輯運(yùn)算，共同完成對緊急關(guān)斷閥的控制，同時在PCS操作站上，通過調(diào)用DVC模塊的面板，組態(tài)閥的操作界面。
根據(jù)控制邏輯，下圖所示的是一個常開型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）的檢測和消防。消防系統(tǒng)由現(xiàn)場安裝的火焰探頭、毒氣（H2S）探頭、可燃?xì)怏w探頭、煙霧探頭；手動報警站、聲/光報警器；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)測信號，完成火災(zāi)或毒氣泄漏邏輯判斷并報警，根據(jù)火警發(fā)生的位置，啟動相應(yīng)的消防設(shè)施，在工藝區(qū)啟動水噴淋系統(tǒng)，在儲罐區(qū)啟動水噴淋和泡沫噴淋，在變電站及室內(nèi)無人職守區(qū)，啟動CO2噴射裝置。消防水系統(tǒng)的壓力維持在8公斤，設(shè)充壓泵自動維持壓力，消防泵為電動/柴油雙驅(qū)動，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)的模擬信號具有線路診測功能，開關(guān)信號采用常閉信號，設(shè)開路報警并加線路檢測報警，確保系統(tǒng)的可靠性。
NEW Cutler Hammer HFD3150 Circuit Breaker 150 Amp
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Westinghou?se Circuit Breaker 15amp, 480 vac, EHB3015
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Personalit?y module PM020BS403?0PH-0 for Electro-cr?aft
Personalit?y module PM020BH403?0PLD-02 for Electro-cr?aft
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GIDDINGS & LEWIS CENTURION DS-100 DS120, 401-34201-?22
Electro-Cr?aft IQ2000 IQ-2000 PDM-30,910?1-2163 PDM30 Wr
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