NI 9871 Operating Instructions
6
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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
