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Appendix B. Connector Pinouts
B.1 DB9 M Connector
Figure B-1. DB9 M connector.
Table B-1. DB9 M connector pinout.
DB9 M Pin Direction RS-232
1Input DCD
2Input RXD
3Output TXD
4Output DTR
5 — GND
6Input DSR
7Output RTS
8Input CTS
9Input RI
B.2 Terminal Block
Figure B-2. Terminal block connector.
Table B-2. Terminal block connector pinout.
Terminal RS-232 Direction (RS-232) RS-422 RS- 485
A RTS Output TDA (-) Data A (-)
BTD Output TDB (+) Data B (+)
CCTS Input RDA (-) —
DRD Input RDB (+) —
EGND —GND GND