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大明哥
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樓主  發(fā)表于: 2015-07-08 16:37
[attachment=137084]   RS485端口接線(xiàn)分為二線(xiàn)制和四線(xiàn)制。請問(wèn)一下，什么時(shí)候用二線(xiàn)制什么時(shí)候用四線(xiàn)制�；蛘哒f(shuō)什么時(shí)候用二線(xiàn)制更合適
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1樓  發(fā)表于: 2015-07-08 21:12
    

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