User Manual

14
Serial (COM) connector
The 9-pin DB9 connector allows you to connect RS-232/
RS-422/RS-485 devices that have serial ports, such as
bar code scanner, modem, or printers. Please refer to the
table below for the pin denitions of the dierent COM
connectors.
NOTE: Default set to RS-232.
1 2 3 4 5
6 7 8 9
Pin RS-232 RS-422 RS-485
1 NA TX- D-
2 RXD TX+ D+
3 TXD RX+ NA
4 NA RX- NA
5 GND GND GND
6 NA NA NA
7 RTS# NA NA
8 CTS# NA NA
9 NA NA NA