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Wiring the ni 9871, Table 1. rs485/rs422 port pinout – National Instruments RS485 User Manual

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NI 9871 Operating Instructions

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Wiring the NI 9871

The NI 9871 has four RJ-50 receptacles that provide connections
for four RS485/RS422 devices.

Table 1. RS485/RS422 Port Pinout

RJ-50 Pin

Signal Name*

1

No Connect

2

TXD–

3

TXD+

4

RTS–

5

CTS–

6

RXD–

7

RXD+

8

RTS+

9

CTS+

10

GND

* These signals are shared by all four RJ-50 connectors on the NI 9871.

RJ50 Jack

NC
TXD–
TXD+
RTS–
CTS–
RXD–
RXD+
RTS+
CTS+
COM

1
2
3
4
5
6
7
8
9

10

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