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Page 54
724-746-5500 | blackbox.com
Appendix B: Connector Pinouts
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
1 Input DCD
2 Input RXD
3 Output TXD
4 Output DTR
5 — GND
6 Input DSR
7 Output RTS
8 Input CTS
9 Input 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 (-)
B TD Output TDB (+) Data B (+)
C CTS Input RDA (-) —
D RD Input RDB (+) —
E GND — GND GND