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我按網(wǎng)上找到的接線圖做了一條omron的數(shù)據(jù)線,一頭是計(jì)算機(jī)的RS232口,一頭是OMRON  NT631C-ST141B-E觸摸屏,但連接不上.請高手幫忙看看問題出在哪里?我的線有沒有做錯(cuò)?下圖有'#'號(hào)的4和6是短接的.

                      TXD 2---------------------------------------------2 RXD
                      RXD 3---------------------------------------------3 TXD
                       RTS 4---------------------------------------------8 CTS
                       CTS 5---------------------------------------------7 RTS
                      GND 9---------------------------------------------5 GND
                                                                                      # ----4 DTR
                                                                                      # ----6 DSR     (4和6短接)



OMRON  PLC                                                                           計(jì)算機(jī)的RS
或觸摸屏的RS     --------------------------------------------------   232口
232口                                                                                           (DB9F  孔)
(DB9M  針)