Axiomtek FDK172-834 - Manual (Page 17)

FDK172-834 User’s Manual
Hardware and Installation 11
2.3.1 COM port Connector
The pin assignment of RS-232/RS-422/RS-485 is listed on the following table.
Pin RS-232 RS-422 RS-485
1 DCD TX- Data-
2 RXD TX+ Data+
3 TXD RX+ No use
4 DTR RX- No use
5 GND GND GND
6 DSR No use No use
7 RTS No use No use
8 CTS No use No use
9 RI No use No use