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2 | GND | ϵͳµØ | ÎÞ |
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9 | RX | RS232 Êý¾Ý½ÓÊÕ | ÎÞ |
10 | TX | RS232 Êý¾Ý·¢ËÍ | ÎÞ |
11 | A | RS485 ͨѶ½Ó¿ÚÕý¼« | Ô¤Áô¼æÈÝRS232 DTR |
12 | B | RS485 ͨѶ½Ó¿Ú¸º¼« | Ô¤Áô¼æÈÝRS232 DSR |
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