Appendix D
Pin Assignments
D-2
ni.com
RS485 Pin Assignment
COM Port Setting
The TPC-2106/2106T includes three COM ports: RS232 (COM1 and
COM2), and 4-wire RS232 (COM3) or RS485 (COM4). COM3 and COM4
share the same DB9 connector, which you can set through the software.
Pin Number
Description
Pin 1
DATA–
Pin 2
No Connection
Pin 3
No Connection
Pin 4
DATA+
Pin 5
GND
Pin 6
No Connection
Pin 7
No Connection
Pin 8
No Connection
Pin 9
No Connection
1
5
9
6