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6.0 Pin Assignments & Cable Wiring
The pin assignments of the DB9 and DB25 Male port are stated as below:
Type
Signal
DB9M DB25M
TxD-
1 8
TxD+
2 3
RxD+
3 2
RxD-
4 20
RTS-
6 6
RTS+
7 4
CTS+
8 5
CTS-
9 22
RS-422
GND
5 7
Type
Signal
DB9M DB25M
Data+
2 3
Data-
1 8
RTS-
6 6
RTS+
7 4
CTS+
8 5
CTS-
9 22
RS-485
GND
5 7
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