National Instruments NI 9871 Getting Started Guide

The cables included with your kit convert the RJ-50 pinout to the
standard NI pinout on a DB-9 male connector, as shown in
Table 2.
Table 2. Pin Assignments for RS485/RS422 DB-9 Male Connector
Connector RJ-50 Pin Signal Name
6
7
8
9
1
2
3
4
5
1 GND
2 CTS+
3 RTS+
4 RXD+
5 RXD-
6 CTS-
7 RTS-
8 TXD+
9 TXD-
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National Instruments NI 9871 Specifications

General

Brand	National Instruments
Model	NI 9871
Category	Control Unit
Language	English