Quatech SDS User’s Manual
Appendix A
April 2008
940-0183-155
Page 85
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
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
N/C
CTS 8 AuxIn+
N/C
RI 9 TxD–
Transmit/Receive Data (Data–)
