ADLINK Technology MXE-1300 Series, User Manual, Page: 26 / 80

14 Introduction
1.7.2 COM Ports
The MXE-1300 provides 4 COM ports on the rear panel in the
form of D-sub 9P connectors, configured as follows. COM1 &
COM2 ports can support RS232/RS422/RS485 mode as set in
BIOS, see “Serial Port 1~4 Configuration” on page 54..
X
2x Software-programmable RS-232/422/485 (COM1 &
COM2) by DB9 connectors
X
2x RS-232 (COM3 & COM4) by DB9 connectors
WARNING:
Please ensure that DC power supply is within the input voltage
range defined in the specification, stable and low-noise, and
provides sufficient operating current.
Over- or under-voltage, unstable, or insufficiently powered DC
power supply may cause system instability and physical dam-
age.
PIN
Signal name
RS-232 RS-422 RS-485
1 DCD# RXD422n 485n
2 RXD RXD422p 485p
3 TXD TXD422p N/S
4 DTR# TXD422n N/S
5 GND N/S N/S
6 DSR# N/S N/S
1 5
6 9