Black Box LES431A Appendix B Connector Pinouts, Appendix B. Connector Pinouts DB9 M Connector

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

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