User Manual

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.

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

6DSR# N/S N/S