National Instruments Touch Panel Computer TPC-2012 - Manual (Page 26)

Appendix B Serial Port Settings
© National Instruments Corporation B-3 TPC-2012/TPC-2512 User Manual
PIN RS-232 RS-422 RS-485
1 NDCD TX– D–
2 NRX TX+ D+
3 NTX RX+
4 NDTR RX–
5 GND GND GND
6 NDSR
7 NRTS
8 NCTS
9 NRI