描述
Bently 3300/12-01-20-00
在選擇設備時，首先要選擇有較高抗干擾能力的產品，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、隔離性能好的PLC系統(tǒng)；其次還應了解生產廠給出的抗干擾指標，如共模擬制比、差模擬制比，耐壓能力、允許在多大電場強度和多高頻率的磁場強度環(huán)境中工作；另外是靠考查其在類似工作中的應用實績。在選擇國外進口產品要注意：我國是采用220V高內阻電網制式，而歐美地區(qū)是110V低內阻電網。由于我國電網內阻大，零點電位漂移大，地電位變化大，工業(yè)企業(yè)現場的電磁干擾至少要比歐美地區(qū)高4倍以上，對系統(tǒng)抗干擾性能要求更高，在國外能正常工作的PLC產品在國內工業(yè)就不一定能可靠運行，這就要在采用國外產品時，按我國的標準（GB/T13926）合理選擇。
? ? 此外，位保證電網饋點不中斷，可采用在線式不間斷供電電源（UPS）供電，提高供電的安全可靠性。并且UPS還具有較強的干擾隔離性能，是一種PLC控制系統(tǒng)的理想電源。
產品承諾：
保?證?全新原裝進口,
保?證?安全準時發(fā)貨，
保?證售后服務質量，
優(yōu)勢價格，大量現貨。
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。Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA
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