
Quatech SDS User’s Manual Appendix A
Signals: RJ-45:
DB-9:
View looking into
the connector
View looking into
the connector
RS-232
signal
Pin # RS-422/485 signal,
4-wire mode
RS-422/485 signal,
2-wire mode
RI 1
TxD– Transmit/Receive Data (Data–)
RTS 2 AuxOut+ N/C
DTR 3 AuxOut– N/C
GND 4 GND Signal Ground (GND)
TxD 5 TxD+ Transmit/Receive Data (Data+)
RxD 6 RxD+ N/C
DCD 7 AuxIn– N/C
DSR 8 RxD– N/C
CTS 9 AuxIn+ N/C
N/C 10
N/C N/C
RS-232
signal
Pin # RS-422/485 signal,
4-wire mode
RS-422/485 signal,
2-wire mode
DCD 1 AuxIn– N/C
RxD 2 RxD+ N/C
TxD 3 TxD+ Transmit/Receive Data (Data+)
DTR 4 AuxOut– N/C
GND 5 GND Signal Ground (GND)
DSR 6 RxD– N/C
RTS 7 AuxOut+ N/C
CTS 8 AuxIn+ N/C
RI 9 TxD– Transmit/Receive Data (Data–)
July 2005 940-0183-153 Page 85