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USBG-COMi-M USB-to-RS232/422/485 Adapter User’s Manual
12
RS-422 Signal Wiring
Point-to-Point 4 Wire Full Duplex
RS-422 with Handshaking
2
Tx+(B)
Rx+ (B)
Rx- (A)
Tx+ (B)
Tx- (A)
GND
USB-COMi-M
RS-422 Device
1
Tx- (A)
3
Rx+ (B)
Rx- (A)
5
GND
7
RTS+(B)
CTS+(B)
6
RTS- (A)
CTS- (A)
8
CTS+(B)
RTS+(B)
9
CTS- (A)
RTS- (A)
4
2
Tx+(B)
Rx+ (B)
Rx- (A)
Tx+(B)
Tx- (A)
GND
USB-COMi-M
RS-422 Device
1
Tx- (A)
3
Rx+ (B)
Rx- (A)
5
GND
4