AB羅克韋爾1771-IBN
三菱PLC采用漏輸入,輸入端本來(lái)就設(shè)計(jì)為對(duì)地短路就引發(fā)開(kāi)入有效!年限制電流大小。不會(huì)對(duì)電源系統(tǒng)構(gòu)成危害,最多只影響自己的回路。也不會(huì)由于電源故障影響其他輸入回路的正常工作!
對(duì)于PLC的開(kāi)關(guān)量輸入回路。我個(gè)人感覺(jué)日本三菱的要好得多,甚至比西門(mén)子等赫赫大名的PLC都要實(shí)用和可靠!其主要原因是三菱等日本PLC從歐美那兒學(xué)來(lái)技術(shù)并優(yōu)化設(shè)計(jì),作到:
而很多歐美PLC采用源輸入方式,有一定弊端(當(dāng)然有的PLC可選擇源、漏輸入?。?br />
采用源輸入,是共電源輸入端。在工程實(shí)際應(yīng)用中往往有太多的電纜,你可能無(wú)法保證電纜的相互接觸、破損,說(shuō)不定共電源的開(kāi)關(guān)量線路會(huì)無(wú)意接觸到設(shè)備地、外殼、其他地電位。因此可能斷路電源供應(yīng)回路。
造成電源損壞或者燒掉保險(xiǎn),從而可能影響其他輸入回路的正常工作。除非,每個(gè)輸入回路加保險(xiǎn)……應(yīng)用成本較高也容易出現(xiàn)其他故障!
公司名稱:廈門(mén)潤(rùn)星貿(mào)易有限公司
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