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打印機腳號                       OMROMPLC型號CJ1M的腳號
6   DSR                              1   NC

7   GND                              2   RD

5    RST                              3   SD

3    TXD                              4    CS

2     RXD                             5    RS

                                             6    +5V

                                            7,8   NC

                                             9      SG        

RS232線如何做

寫的不明白