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湛藍小爾
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樓主  發(fā)表于: 2015-04-28 10:57
1.百度解釋四線(xiàn)制485就是422，
2，手上有一根USB轉485,422,232的線(xiàn)，CPU224一個(gè)
3.怎么實(shí)現485四線(xiàn)制通訊
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fengrunsheng
生活中本不缺少美,缺少的是發(fā)現美的眼睛!
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1樓  發(fā)表于: 2015-04-28 11:03
485就兩根線(xiàn),分清+  -就可以了.
hsqknx
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2樓  發(fā)表于: 2015-04-29 12:15
四根的s+和r+，s-和r-并起來(lái)不就是兩線(xiàn)了嗎

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