描述
為了保證系統(tǒng)在工業(yè)電磁環(huán)境中免受或減少內(nèi)外電磁干擾,必須從設(shè)計階段開始便采取三個方面抑制措施:抑制干擾源;切斷或衰減電磁干擾的傳播途徑;提高裝置和系統(tǒng)的抗干擾能力。這三點就是抑制電磁干擾的基本原則。PLC控制系統(tǒng)的抗干擾是一個系統(tǒng)工程,要求制造單位設(shè)計生產(chǎn)出具有較強抗干擾能力的產(chǎn)品,且有賴于使用部門在工程設(shè)計、安裝施工和運行維護中予以全面考慮,并結(jié)合具體情況進行綜合設(shè)計,才能保證系統(tǒng)的電磁兼容性和運行可靠性。進行具體工程的抗干擾設(shè)計時,應(yīng)注意以下兩個方面。設(shè)備選型在選擇設(shè)備時,首先要選擇有較高抗干擾能力的產(chǎn)品,其包括了電磁兼容性(EMC),尤其是抗外部干擾能力,如采用浮地技術(shù)、隔離性能好的PLC系統(tǒng);其次還應(yīng)了解生產(chǎn)廠給出的抗干擾指標(biāo),如共模擬制比、差模擬制比、耐壓能力、允許在多火電場強度和多高頻率的磁場強度環(huán)境中工作。綜合抗干擾設(shè)計
主要考慮來自系統(tǒng)外部的幾種抑制措施。主要內(nèi)容包括:對PLC系統(tǒng)及外引線進行屏蔽,以防空間輻射電磁干擾;對外引線進行隔離、濾波,特別是原理動力電纜,分層布置,以防通過外引線引入傳導(dǎo)電磁干擾;正確設(shè)計接地點和接地裝置,完善接地系統(tǒng)。另外,還必須利用軟件手段,進一步提高系統(tǒng)的安全可靠性。
產(chǎn)品承諾:
保?證?全新原裝進口,
保?證?安全準時發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢價格,大量現(xiàn)貨。
主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
品牌:ABB???,AB??,GE,FOXBORO,本特利,英維思,伍德沃德,西屋,瑞恩,施耐德,西門子,摩托羅拉,安川。力士樂。ACSO,橫河等進口品牌。 專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊
Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA ? 專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家
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