Black Box LES421A User Manual

Black Box

724-746-5500 | blackbox.com

724-746-5500 | blackbox.com

Page 55

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