Advantech Intel XScale PXA Touch Panel Computer TPC-66 Series - Manual (Page 70)

TPC-66 Series User Manual 58
Appendix C Pin Assignments
C.1 RS-232 Pin Assignment
C.2 RS-485 Pin Assignment
C.3 COM Port Setting
TPC-66 panel computers provide three COM ports: RS-232 (COM1 and
COM2), 4-wire RS-232 (COM3) and RS-485 (COM4). COM3 and
COM4 share the same DB9 connector. Its setting, COM3 or COM4, is
through software.