National Instruments NI 9871 - External Power Supply Requirements

Table 1. RS485/RS422 Port Pinout
RJ-50 Pin Signal Name*
RJ50 Jack
NC
TXD–
TXD+
R
TS–
CTS–
RXD–
RXD+
RTS+
CTS+
COM
1
2
3
4
5
6
7
8
9
10
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.
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