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RS-485 by RTS,4-Wire
Orange
Signal Pin-outs of DB-9 Male
RS-232 Signal Pin-outs of DB-9 Male
Pin 1
DCD
Pin 2
RxD
Pin 3
TxD
Pin 4
DTR
Pin 5
GND
Pin 6
DSR
Pin 7
RTS
Pin 8
CTS
Pin 9
RI
RS-422 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
Pin 6
RTS- (A)
Pin 7
RTS+(B)
Pin 8
CTS+(B)
Pin 9
CTS- (A)
RS-422 Signal Wiring
•
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
4
