2711-B5A5L2
2711-B5A5L2
2711-B5A5L2(1)DCS系統(tǒng)是個大系統(tǒng),其控制器功能強而且在系統(tǒng)中的作用十分重要,數(shù)據(jù)公路更是系統(tǒng)的關(guān)鍵,所以,必須整體投資一步到位,事后的擴容難度較大。而FCS功能下放較徹底,信息處理現(xiàn)場化,數(shù)字智能現(xiàn)場裝置的廣泛采用,使得控制器功能與重要性相對減弱。因此,F(xiàn)CS系統(tǒng)投資起點低,可以邊用、邊擴、邊投運。 (2)DCS系統(tǒng)是封閉式系統(tǒng),各公司產(chǎn)品基本不兼容。而FCS系統(tǒng)是開放式系統(tǒng),用戶可以選擇不同廠商、不同品牌的各種設(shè)備連入現(xiàn)場總線,達到最佳的系統(tǒng)集成。 (3)DCS系統(tǒng)的信息全都是二進制或模擬信號形成的,必須有D/A與A/D轉(zhuǎn)換。而FCS系統(tǒng)是全數(shù)字化,就免去了D/A與A/D變換,高集成化高性能,使精度可以從±0.5%提高到±0.1%。 (4)FCS系統(tǒng)可以將PID閉環(huán)控制功能裝入變送器或執(zhí)行器中,縮短了控制周期,目前可以從DCS的每秒2~5次,提高到FCS的每秒10~20次,從而改善調(diào)節(jié)性能。 (5)DCS它可以控制和監(jiān)視工藝全過程,對自身進行診斷、維護和組態(tài)。但是,由于自身的致命弱點,其I/O信號采用傳統(tǒng)的模擬量信號,因此,它無法在DCS工程師站上對現(xiàn)場儀表(含變送器、執(zhí)行器等)進行遠方診斷、維護和組態(tài)。FCS采用全數(shù)字化技術(shù),數(shù)字智能現(xiàn)場裝置發(fā)送多變量信息,而不僅僅是單變量信息,并且還具備檢測信息差錯的功能。FCS采用的是雙向數(shù)字通信現(xiàn)場總線信號制。因此,它可以對現(xiàn)場裝置(含變送器、執(zhí)行機構(gòu)等)進行遠方診斷、維護和組態(tài)。FCS的這點優(yōu)越性是DCS無法比擬的。 (6)FCS由于信息處理現(xiàn)場化,與DCS相比可以省去相當(dāng)數(shù)量的隔離器、端子柜、I/O終端、I/O卡件、I/O文件及I/O柜,同時也節(jié)省了I/O裝置及裝置室的空間與占地面積。有專家認為可以省去60%。 (7)與(6)同樣理由,F(xiàn)CS可以減少大量電纜與敷設(shè)電纜用的橋架等,同時也節(jié)省了設(shè)計、安裝和維護費用。有專家認為可以節(jié)省66%。 對于(6)、(7)兩點應(yīng)補充說明的是,采用FCS系統(tǒng),節(jié)省投資的效果是不用懷疑的,但是否如有的專家所說達60~66%。這些數(shù)字在多篇文章中出現(xiàn),編者認為這是相互轉(zhuǎn)摘的結(jié)果,目前還未找到這些數(shù)字的原始出處,因此,讀者在引用這些數(shù)字時要慎重。 (8)FCS相對于DCS組態(tài)簡單,由于結(jié)構(gòu)、性能標(biāo)準(zhǔn)化,便于安裝、運行、維護。 (9)用于過程控制的FCS設(shè)計開發(fā)要點。這一點并不作為與DCS的比較,只是說明用于過程控制或者說用于模擬連續(xù)過程類的FCS在設(shè)計開發(fā)中應(yīng)重點考慮的問題。 1)要求總線本安防爆功能,而且是頭等重要的。 2)基本監(jiān)控如流量、料位、溫度、壓力等的變化是緩慢的,而且還有滯后效應(yīng),因此,節(jié)點監(jiān)控并不需要快電子學(xué)的響應(yīng)時間,但要求有復(fù)雜的模擬量處理能力。這一物理特征決定了系統(tǒng)基本上多采用主一從之間的集中輪詢制,這在技術(shù)上是合理的,在經(jīng)濟上是有利的。 3)流量、料位、溫度、壓力等參數(shù)的測量,其物理原理是古典的,但傳感器、變送器及控制器應(yīng)向數(shù)字智能化發(fā)展。 4)作為針對連續(xù)過程類及其儀器儀表而開發(fā)的FCS,應(yīng)側(cè)重于低速總線H1的設(shè)計完善。
PLC與DCS的前景 我們已經(jīng)知道有的FCS是由PLC發(fā)展而來,而有的FCS是由DCS發(fā)展而來,那么,今天FCS已走向?qū)嵱没,PLC與DCS前景又將如何。 PLC于60年代末期在美國首先出現(xiàn),目的是用來取代繼電器,執(zhí)行邏輯、計時、計數(shù)等順序控制功能,建立柔性程序控制系統(tǒng)。1976年正式命名,并給予定義:PLC是一種數(shù)字控制專用電子計算機,它使用了可編程序存儲器儲存指令,執(zhí)行諸如邏輯、順序、計時、計數(shù)與演算等功能,并通過模擬和數(shù)字輸入、輸出等組件,控制各種機械或工作程序。經(jīng)過30多年的發(fā)展,PLC已十分成熟與完善,并開發(fā)了模擬量閉環(huán)控制功能。PLC在FCS系統(tǒng)中的地位似乎已被確定并無多少爭論。PLC作為一個站掛在高速總線上。充分發(fā)揮PLC在處理開關(guān)量方面的優(yōu)勢。另外,火力發(fā)電廠輔助車間,例如補給水處理車間、循環(huán)水車間、除灰除渣車間、輸煤車間等,在這些車間的工藝過程多以順序控制為主。PLC對于順序控制有其獨特的優(yōu)勢。編者以為,輔助車間的控制系統(tǒng)應(yīng)以遵循現(xiàn)場總線通訊協(xié)議的PLC或能與FCS進行通訊交換信息的PLC為優(yōu)選對象。 自1973年提出第一臺以微處理器為基礎(chǔ)的控制器以來,它逐步完善,并最終形成功能齊全、安全可靠的數(shù)字式分散控制系統(tǒng)DCS。它的性能大大優(yōu)于以住任何一種控制系統(tǒng)?梢詽M足火電廠DAS、MCS、SCS和APS各系統(tǒng)的各種要求,目前還可以通過工業(yè)以太網(wǎng)建立管理層網(wǎng)絡(luò),以滿足火電廠呼聲越來越高的加強管理的要求。可以這樣說,DCS系統(tǒng)的監(jiān)控可以復(fù)蓋大型火電機組的工藝全過程。 但是,自從有了FCS,并于90年代走向?qū)嵱没詠恚粩嘤腥缦抡擖c在公開刊物上發(fā)表,即“從現(xiàn)在起,新的現(xiàn)場總線控制系統(tǒng)FCS將逐步取代傳統(tǒng)的DCS”;“當(dāng)調(diào)節(jié)功能下放到現(xiàn)場去以后,傳統(tǒng)的DCS就沒有存在的必要而會自動消失”;“今后十年,傳統(tǒng)的4~20mA模擬信號制將逐步被雙向數(shù)字通信現(xiàn)場總線信號制所取代,模擬與數(shù)字的分散型控制系統(tǒng)DCS將更新?lián)Q代為全數(shù)字現(xiàn)場總線控制系統(tǒng)FCS”……。這些論點歸納為一句話:FCS將取代DCS,DCS從此將消亡。 上述論點皆出自于權(quán)威專家之口,確實不無道理。數(shù)字通訊是一種趨勢,它代表了技術(shù)進步,是任何人阻擋不了的。雙向數(shù)字通信現(xiàn)場總線信號制以及由它而產(chǎn)生的巨大的推動力,加速現(xiàn)場裝置與控制儀表的變革,開發(fā)出越來越多的功能完善的數(shù)字智能現(xiàn)場裝置。這些都是DCS系統(tǒng)所不具備的,而由此產(chǎn)生的優(yōu)越性以及給火電廠的設(shè)計、配置、組態(tài)、運行、維護、管理等方面帶來的效益也是DCS系統(tǒng)所不及的。再則,F(xiàn)CS是由DCS以及PLC發(fā)展而來,它保留了DCS的特點,或者說FCS吸收了DCS多年開發(fā)研究以及現(xiàn)場實踐的經(jīng)驗,當(dāng)然也包括教訓(xùn)。由此而得出結(jié)論,“FCS將取代DCS”,似乎也是順理成章之事。 同時我們也應(yīng)看到,DCS系統(tǒng)發(fā)展也近30年,在火電廠的應(yīng)用如此廣泛。它的設(shè)計思想、組態(tài)配置、功能匹配等已達十分完善的程度(當(dāng)然,DCS也存在進一步發(fā)展的需求,例如高級軟件開發(fā),以滿足信息集成的要求),已滲透到火電廠控制系統(tǒng)的各個領(lǐng)域,并且在FCS系統(tǒng)中也有些體現(xiàn)。從這個角度來看,DCS系統(tǒng)似乎不能說從此消亡。再則,從前面的章節(jié)敘述中已經(jīng)談到,對那些FCS系統(tǒng)不能充分發(fā)揮其特點及優(yōu)越性的領(lǐng)域,DCS系統(tǒng)仍有用武之地。 開始大!只要您給出合理價格我賣給你,只要您給出同行的價格我賣給你,只要您誠心購買給錢我就賣給你。 如果您發(fā)現(xiàn)其他供貨商為相同產(chǎn)品提供更為低廉的價格,我們也愿意參照其價格向您提供進一步的折扣
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DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K10G16L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K10G1L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K10G3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K10G3L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K10G8 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K10G8L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K10G9 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K10G9L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K14C1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K14C10 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K10G14 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K10G15 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K10G16 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K14C3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K14C8 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K14C9 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K3A10L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K3A17L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K3A2L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K3A5L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A10 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A10L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A10L2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A10L3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A14 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A14L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A15 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A15L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A15L3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A16 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A16L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A1L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A1L2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A1L3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A2L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A2L2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A2L3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A3L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A3L2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A3L3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A5 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A5L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A5L2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A5L3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A8 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A8L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A8L2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A8L3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A9 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A9L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A9L2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K5A9L3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C10 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C10L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C14 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C14L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C15 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C15L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C16 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C16L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C1L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C2L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C3L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C5 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C5L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C8 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C8L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C9 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K6C9L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C10 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C10L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C14 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C14L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C15 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C15L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C16 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C16L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C1L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C3L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C8 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C8L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C9 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-K9C9L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-M3A18L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-M3A19L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NB2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NB3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NC1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NC13 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NC14 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NC2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NC21 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NC22 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND1R DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND1S DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND1W DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND1WR DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND1WS DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND2DER DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND2DES DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND2FRR DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND2FRS DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND2R DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND2S DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND3DER DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND3DES DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND3ESR DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND3ESS DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND3FRR DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND3FRS DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND3R DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND3S DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-ND3UR DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NF1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NF2A DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NF2C DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NF4 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NF5 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NF6 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NK1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NL1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NL2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NL3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NL4 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NM1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NM11 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NM12 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NM13 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NM14 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NM2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NM216 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NM28 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NM3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NM4 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NMCC DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NP1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NP2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NP3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NR1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NR4 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NR5K DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NR5T DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NR6K DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NR6T DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NT1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NT1C DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NV1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NV3K DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NV3T DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NV4 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NV4T DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NV5 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NV6K DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NV6T DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NV7K DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-NV7T DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C10 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C10L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C14 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C14L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C15 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C15L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C16 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C16L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C1L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C3L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C8 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C8L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C9 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10C9L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G10 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G10L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G14 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G14L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G15 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G15L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G16 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G16L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G1L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G3L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G8 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G8L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G9 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T10G9L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T14C1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T14C10 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T14C14 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T14C15 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T14C16 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T14C3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T14C8 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T14C9 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T5A10L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T5A14L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T5A15L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T5A16L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T5A1L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T5A2L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T5A3L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T5A5L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T5A8L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T5A9L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T6C10L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T6C15L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T6C16L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T6C1L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T6C2L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T6C3L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T6C5L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T6C8L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T6C9L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C10 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C10L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C14 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C14L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C15 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C15L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C16 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C16L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C1L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C3 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C3L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C8 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C8L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C9 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711-T9C9L1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-K10C15 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-K10C6 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-K14C15 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-K14C6 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-NA1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-NA2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-ND1 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-ND1DE DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-ND1ES DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-ND1FR DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-ND7 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-NK5 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-NT2 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-T10C15 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-T10C6 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-T14C15 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-T14C6 DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-U1B12C DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT ALLEN BRADLEY 2711E-UMOD DEVICENET COMMUNICATIONS & RS-232 PRINTER PORT 我們似乎沒有必要在文字上做過多的爭論,一定要強調(diào)誰取代誰。正如目前的DCS與新型的PLC,由于多年的開發(fā)研究,在各自保留自身原有的特點外,又相互補充,形成新的系統(tǒng),現(xiàn)在的DCS已不是當(dāng)初的DCS,同樣如此,新型的PLC也不是開發(fā)初期的PLC。我們能夠說是DCS取代了PLC或者說是PLC取代了DCS,顯然都是不合適的。
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中山大工:銷售熱線:. 86326362 技術(shù)專線: TEL:18022026245 QQ:3148250456
※ 數(shù)字式波段開關(guān),也稱數(shù)字編碼式開關(guān),主要適用于CNC機械面板之操作模式、軸向、倍率、速率百分比等波段選擇.※ 在PLC應(yīng)用上采用數(shù)字編碼式開關(guān),通常可以節(jié)省大量IO點.
※ 金屬外型炫亮堅固,段數(shù)標(biāo)記清晰 .
※ 提供15,30,13.85,27.69°波段角度供選擇 .
※ 波段段數(shù)可由雙擋桿任意設(shè)置 .
※ 多種輸出數(shù)字編碼方式(2進制,2進制補碼,格雷碼等).
※ 波段擋桿堅固,軸心附防滑花紋 .
※ 含信號禁止或偶同位信號防止誤動作 .
※ 鍍金雙接點,接觸電阻穩(wěn)定,使用壽命長 .
※ 主體座安裝O型密封圈,正面板防油防水設(shè)計 ,編碼體密閉防油防水設(shè)計 .
※ 新型結(jié)構(gòu),不易變形斷裂,安裝方便 .
※ 節(jié)省配線與CNC輸入點并可選擇附插座型式輸出.
擁有了高性能的新款溫度開關(guān)S6300,泰科思可提供轉(zhuǎn)換輸出量為30A的理想的控制裝置。無線和無外部繼電器的集成功率繼電器溫度開關(guān)S6300,在便于安裝的同時也使節(jié)省空間成為了可能。
1.
適用於CNC機械面板之模式、軸向、倍率、速率百分比
等波段選擇
n 金屬外形絢亮堅固,波段標(biāo)示清晰
n 提供15度、30度、13.85度、27.59度波段角度供選擇
n 波段數(shù)可由雙檔桿自由設(shè)定
n 提供多種數(shù)位元輸出方式 如2進制輸出, 補數(shù)輸出等
n 波段檔桿堅固,軸心防滑花紋設(shè)計
n 含信號禁止或偶同位元信號防止誤動作
n 鍍金雙接點,接觸電阻穩(wěn)定,使用壽命長
n 主體安裝座附O令,正面板防油防水設(shè)計
n 編碼器密封防油防水設(shè)計
n 新型結(jié)構(gòu),不易變形斷裂,按照方便
節(jié)省配線與CNC輸入點並可附插座型式輸出
http://www.baochen.com.cn
音叉式物/液位開關(guān) |
HN系列音叉式物位開關(guān)是一種通用型的物位限位開關(guān)。音叉由壓電晶體激勵產(chǎn)生振動,當(dāng)音叉被液體或固體浸沒時振動頻率發(fā)生變化,這個頻率變化由電子線路檢測出來并輸出一個開關(guān)量。音叉式物位開關(guān)不受介質(zhì)電參數(shù)以及湍流、攪動、氣泡、振動等因素的影響,無活動部件,因此無需維護和調(diào)整,是復(fù)雜工況下物位開關(guān)的理想選擇。 產(chǎn)品特點: ◆ 適應(yīng)性強:被測物料不同的電參數(shù)、密度對測量均不產(chǎn)生影響。結(jié)垢、攪動、湍流、氣泡、振動、中等粘度、高溫、高壓等惡劣條件對檢測也無影響。 ◆ 免于維護:由于音叉限位開關(guān)的檢測過程由電子電路完成,無活動部件,所以一經(jīng)安裝投運便不需要維護。 ◆ 不需調(diào)校:由于音叉限位開關(guān)的檢測不受被測介質(zhì)電參數(shù)及密度的影響,所以無論測量何種液體都不需現(xiàn)場調(diào)校 典型應(yīng)用對象: ◆自來水、礦泉水 、汽柴油 ◆可產(chǎn)生氣體的液體 ◆紙漿、膠水、染料 、化工 ◆啤酒、啤酒發(fā)酵劑、飲料 ◆廢水、泥漿、酸、堿溶液 ◆流動性好的固體粉料、小顆粒 技術(shù)參數(shù): 電源電壓:220VAC/24VDC 工作溫度:-30~150℃(叉體)-20~70℃(儀表) 工作壓力:≤2MPa 介質(zhì)比重:最低0.7 輸出方式:繼電器輸出(5A/220VAC) 輸出延時:1~60秒可調(diào) 功耗: 0.5W 安裝螺紋:1″PT螺紋 叉體長度:100mm(標(biāo)準(zhǔn)型) 材質(zhì):sus304 安裝要求: 音叉式物位開關(guān)通常采用側(cè)裝(在倉壁側(cè)面安裝)方式安裝與倉體側(cè)壁對料位高度進行上下限位置的檢測;當(dāng)倉體不便側(cè)面開孔時可采用頂裝(在倉的頂部安裝)方式安裝,位置應(yīng)選擇能避開進料時物料沖擊的位置;亦可安裝與管道上防止泵的無料運行。 |
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,例如:EN,IEC,VDE和RoHS 2002/95/EG等。此外,多德繼電器還符合多個第三方認證,例如:BG,TÜV,UL,CSA和CCC等。多德E.Dold&Soehne KG公司沿襲德國黑森林地區(qū)傳統(tǒng)精準(zhǔn)的制造工藝生產(chǎn)繼電器產(chǎn)品,是一家超過70年的家族式企業(yè),目前公司正由多德家族的第三代管理運營。多德公司員工超過500人,而且很多是為公司服務(wù)超過20年的老員工,他們熟知并嚴(yán)格執(zhí)行著公司的質(zhì)量管控標(biāo)準(zhǔn),這遠遠要比單純的Know-How意義深遠。
產(chǎn)品范圍:
德國E.Dold&Soehne KG繼電器、E.Dold&Soehne KG安全繼電器、E.Dold&Soehne KG繼電器模塊、E.Dold&Soehne KG、E.Dold&Soehne KG開關(guān)、E.Dold&Soehne KG壓力變送器、E.Dold&Soehne KG溫度開關(guān)
主要型號:
BG5925.03 0048653、BD5935.16 DC24V、ML9988.51 24Vdc、BH5928.93,24V、BD 5935.48、BD5935、BD5935.48 DC24V、BG5924.48/DC24V、BD5936.17 AC/DC24-60V、BD5935.48 DC24V
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