AB羅克韋爾1771-IAD
三菱PLC采用漏輸入，輸入端本來就設計為對地短路就引發(fā)開入有效！年限制電流大小。不會對電源系統(tǒng)構成危害，最多只影響自己的回路。也不會由于電源故障影響其他輸入回路的正常工作！
對于PLC的開關量輸入回路。我個人感覺日本三菱的要好得多，甚至比西門子等赫赫大名的PLC都要實用和可靠！其主要原因是三菱等日本PLC從歐美那兒學來技術并優(yōu)化設計，作到：
而很多歐美PLC采用源輸入方式，有一定弊端（當然有的PLC可選擇源、漏輸入！）
采用源輸入，是共電源輸入端。在工程實際應用中往往有太多的電纜，你可能無法保證電纜的相互接觸、破損，說不定共電源的開關量線路會無意接觸到設備地、外殼、其他地電位。因此可能斷路電源供應回路。
造成電源損壞或者燒掉保險，從而可能影響其他輸入回路的正常工作。除非，每個輸入回路加保險……應用成本較高也容易出現(xiàn)其他故障！
公司名稱：廈門潤星貿(mào)易有限公司
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