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1772-LG

工業(yè)自動化組件供應商越來越多的把以太網(wǎng)協(xié)議作為他們產(chǎn)品的標準規(guī)范，許多廠商也直接把以太網(wǎng)技術作為新產(chǎn)品的網(wǎng)絡連接手段。由于這些供應商的推動，這也就需要機械制造商和終端客戶將觀念從舊的現(xiàn)場總線技術轉(zhuǎn)變到以太網(wǎng)技術上來。

工業(yè)以太網(wǎng)總線正因為有諸多的優(yōu)點，在國內(nèi)外逐步得到了迅速的普及，現(xiàn)在已經(jīng)有大量的配套產(chǎn)品在使用中。如工業(yè)以太網(wǎng)HUB，工業(yè)以太網(wǎng)防火墻產(chǎn)，工業(yè)以太網(wǎng)關，以太網(wǎng)轉(zhuǎn)RS232/RS485設備，以太網(wǎng)A/D模塊，以太網(wǎng)D/A模塊，以太網(wǎng)AI模塊，以太網(wǎng)AO模塊，以太網(wǎng)DI模塊，以太網(wǎng)DO模塊及復合功能模塊。

目前以太網(wǎng)還只適合于工業(yè)控制網(wǎng)絡系統(tǒng)的信息層應用。以太網(wǎng)是Byte級網(wǎng)絡，只能部分代替現(xiàn)場總線作用，而將以太網(wǎng)用于現(xiàn)場I/O級，這是目前工控領域研究的熱點之一。

而工業(yè)以太網(wǎng)技術基礎及應用方式多是基于商用以太網(wǎng)發(fā)展而來的，在全球主導的有線網(wǎng)絡將數(shù)據(jù)傳輸技術的基礎上，根據(jù)工業(yè)領域的特點要求，采用以太網(wǎng)通信協(xié)議作為基本技術發(fā)展而生。工業(yè)以太網(wǎng)市場需求十分廣泛，無論是新建一條現(xiàn)代化的制造生產(chǎn)線，還是對舊有設備的改造，都會大量使用工業(yè)以太網(wǎng)。

對此，工業(yè)以太網(wǎng)的市場增長率也始終居高不下，據(jù)有關統(tǒng)計，每年新增工業(yè)網(wǎng)絡接口數(shù)量都將會是前一年的一倍左右。而隨著工業(yè)以太網(wǎng)技術延展而帶動的PLC、DCS及PC_Based等控制類產(chǎn)品的市場容量，更是難以計算。

與普通的以太網(wǎng)相比，工業(yè)以太網(wǎng)需要解決開放性、實時性、同步性、可靠性、抗干擾性及安全性等諸多方面的問題，這也是工業(yè)自動化廠商不同于普通IT廠商能為工業(yè)用戶帶去更大價值的地方

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Allen Bradley 8520-1APA1 Circuit Board Repair Only!!!
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Allen Bradley 92100000-A01 Circuit Board Rev B
Allen Bradley A20B-1004-0850/04A A20B1004085004A Circuit Board Y33 3 C6063 Used
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ALSTOM 43297 029, 10309 00758 AB Circuit Board
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ASEA 2668 184-806/1 Circuit Board ABB - Used
Astec PSE6-300-034A Circuit Board Power Supply Burn In
Astec PSE6-300-034A Unisys 455018822-013 Circuit Board Power Supply Burn-In
Ausgangskarte Homatic Circuit Board 2-083-01-5410 _ 2083015410 _ HC020
Autotech MPC-M3100-M11 Circuit Board MPCM3100M11 (Pack of 3) - Used
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BAILEY INFI-90 TRANSFER MODULE CIRCUIT BOARD INIIT02 103260
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