COM1/COM3
Pin1 Rx-(B) (COM1 RS485-2/4)
Pin2 RxD_PLC (COM1 RS232))
Pin3 TxD_PLC (COM1 RS232)
Pin4 Tx- (COM1 RS485-4)
Pin5 GND
Pin6 Rx+(A) (COM1 RS485-2/4)
Pin7 RxD_PC/PLC (COM3 RS232)
Pin8 TxD_PC/PLC (COM3 RS232)
Pin9 Tx+ (COM1 RS485-4)
![a596331e469eea88a788268cefe5563d_%E7%AB%AF%E5%AD%901](http://m.jiongmu.cn/file/upload/202011/24/10/10-55-27-95-30504.png)
![4c6cad2d94050e2dea1e95c27edd5240_201912061337586718](http://m.jiongmu.cn/file/upload/202011/24/10/10-55-53-27-30504.png)