User manual

51 TPC-1071H/1271H/1571H/1771H User Manu-
Appendix A Main Board Connector and Switch Settings
A.3.1 COM1/ COM2/ COM5(Option): RS-232
A.3.1.1 Pin Definition
Pin Signal
1NDCD
2 NRX
3NTX
4NDTR
5GND
6 NDSR
7NRTS
8 NCTS
9NRI