The AR-2000 9 pin RS-422A pin configuration is as follows:
1. FG
2. RXD+
3. TXD-
4. NC
5. NC
6. NC
7. RXD+
8. TXD-
9. FG
The AR-2000 9 pin RS-422A pin configuration is as follows:
1. FG
2. RXD+
3. TXD-
4. NC
5. NC
6. NC
7. RXD+
8. TXD-
9. FG