Black Box 1-, 2-, and 4-Port Hardened Serial Servers Appendix B Connector Pinouts, Terminal Block

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	RS-232	Direction (RS-232)	RS-422/485 4-Wire	RS-485 2-Wire
1	DCD	Input	RDA (-)	—
2	RD	Input	RDB (+)	—
3	TD	Output	TDB (+)	Data B (+)
4	DTR	Output	TDA (-)	Data A (-)
5	GND	—	GND	GND
6	DSR	Input	—	—
7	RTS	Output	—	—
8	CTS	Input	—	—
9	—	—	—	—

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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