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a475100193
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樓主  發(fā)表于: 2011-03-19 15:26
RJ-11的EV,GND,SG-,SG+與FX2N-485-BD通信板RDA,RDB,SDA,SDB,SG到底該怎么接線(xiàn)
luobinyue
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1樓  發(fā)表于: 2011-06-01 14:11
sg-   rda
sg+  rdb
gnd  sg
ev不知道
看看485通訊協(xié)議
davidhung
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2樓  發(fā)表于: 2011-06-03 02:34

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