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RS-422 with Handshaking
RS-485 4 Wire (Full duplex) Signal Pin-outs of DB-9 Male
Pin 1
TxD- (A)
Pin 2
TxD+(B)
Pin 3
RxD+(B)
Pin 4
RxD-(A)
Pin 5
GND
RS-485 2 Wire (Half duplex) Signal Pin-outs of DB-9 Male
Pin 1
Data- (A)
Pin 2
Data+(B)
Pin 5
GND
RS-485 Signal Wiring
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Point-to-Point 4 Wire Full Duplex
2
TxD+(B)
RxD+ (B)
RxD- (A)
TxD+(B)
TxD- (A)
GND
USBG-8COM PRO
RS-422 Device
1
TxD- (A)
3
RxD+ (B)
RxD- (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
TxD+(B)
RxD+ (B)
RxD- (A)
TxD+(B)
TxD- (A)
GND
USBG-8COM PRO
RS-485 Device
1
TxD- (A)
3
RxD+ (B)
RxD- (A)
5
GND
4
