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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