RS232 接口脚位排列介绍串口 RS-232 — DB9 母頭引脚定义： Pin No. Signal 1 DCD 2 TxD 3 RxD 4 DSR 5 GND 6 DTR 7 CTS 8 RTS 9 --- RS-232 — DB9 公頭引脚定义： Pin No. Signal 1 DCD 2 RxD 3 TxD 4 DTR 5 GND 6 DSR 7 RTS 8 CTS 9 --- RS-232 — DB25 母頭引脚定义：Pin No. Signal 2 RxD 3 TxD 4 CTS 5 RTS 6 DTR 7 GND 8 DCD 20 DSR RS-232 — DB25 公頭引脚定义：Pin No. Signal 2 TxD 3 RxD 4 RTS 5 CTS 6 DSR 7 GND 8 DCD 20 DTR RS-232 — RJ45 (8-pin) 引脚定义：Pin No. Signal 1 DSR 2 RTS 3 GND 4 TxD 5 RxD 6 DCD 7 CTS 8 DTR RS-232 — RJ45 (10-pin) 引脚定义：Pin No. Signal 1 DCD 2 DSR 3 RTS 4 GND 5 TxD 6 RxD 7 GND 8 CTS 9 DTR 10 ---- RS-422 — DB25 母頭 — for Opt8F/Z 引脚定义：Pin No. Signal 2 RxD+(B) 3 TxD+(B) 7 GND 14 RxD-(A) 16 TxD-(A) RS-422/485 — DB25 母頭 — for Opt8K 引脚定义：Pin No. RS-422 signal RS-485 signal 2 RxD+(B) Data+ 3 TxD+(B) 7 GND 14 RxD-(A) Data- 16 TxD-(A)
