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工控玩家
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樓主  發(fā)表于: 2013-06-24 09:27
這種下載線(xiàn)大家都用過(guò)吧。有沒(méi)人知道它的工作電源來(lái)自PLC的RS422口，還是電腦的RS232口？
FX1N-RS232BD通迅板和三菱變頻器通迅時(shí)，這條線(xiàn)可以用嗎？（圓頭端把RS485的線(xiàn)引出接變頻器）
[ 此帖被工控玩家在2013-06-24 09:35重新編輯 ]
tkggtdkjpl
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1樓  發(fā)表于: 2013-06-26 16:08
PLC是422端口的，電源應該用的電腦子232的因為232的標準是高電平12V 低電平3V   422/485高電平是7V 低電平上1V
至于你說(shuō)和其它的相信是用不了的，因為232BD或485是沒(méi)有提供電源的
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