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樓主  發(fā)表于: 2016-05-02 16:56
關(guān)于RS232看到了三種接線(xiàn)方式，分別是：
1.CD信號可以ON/OFF對方設備，能進(jìn)行DTR/DSR控制，DC碼控制的連接
2.CD信號無(wú)法ON/OFF對方設備，能進(jìn)行DTR/DSR控制，DC碼控制的連接
3.CD信號無(wú)法ON/OFF對方設備，能進(jìn)行DC碼控制的連接
之前只知道2-3,3-2,5-5，以上三種還請了解的大牛解釋下。謝謝！

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