Gigabit Sistems JP2pro_rev.S Instruction Manual page 21

3-1-4. Connector Pin Assignment
D-SUB 9-pin female connector pin assignment is as follows:
5
9
D-SUB
Female
A and B are defined as:
Pin Number
1
6
-pin
B
A
20
Signal
GND
TX-A
RX-B
GND
NC
GND
TX-B
RX-A
GND
+
-