Serial Module Operating Instructions and Specifications

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