Mport3208, 8-Port RS232/485 Serial Server
  • 8×RS232/485 Ports, 2×10/100M Ethernet Ports
  • Rack Mount 100M Serial Server
Features and Benefits
  • Support serial port terminal device networking, support UDP, TCP, Modbus, HTTPD, WebSocket, MQTT and virtual serial port
  • Support serial port forwarding, realizing transparent data transmission between serial port and other serial ports
  • Support protocol conversion between Modbus-RTU/ASCII and Modbus-TCP, support Modbus RTU/ASCII over TCP transparent transmission
  • Support MQTT protocol, realizing connectivity between cloud and clients via multiple cloud platforms
  • Support AC85~264V/DC110~370V power input
  • High-strength metal shell, IP40 protection level, fanless chassis for heat dissipation, operating temperature -40°C to +85°C
  • Overview
  • Specifications
  • Downloads
  • Models
Product Description

Mport3208 is an advanced dual-network rack-mount Ethernet serial server, featuring 8 RS232/485 ports and 2 10/100M Ethernet ports. With a powerful 32-bit dual-core Arm Cortex-M7 processor running at up to 528MHz, and a robust external hardware watchdog design, this device ensures reliable data transmission in industrial environments. It supports a wide range of DC and AC power inputs (AC85264V / DC110370V), making it versatile for various industrial setups.


Each of the 8 serial ports can operate independently, supporting different baud rates (600bps~460800bps) and working modes simultaneously. The integration of the TCP/IP protocol stack enables seamless connectivity between RS232/485 serial devices and Ethernet networks, enhancing communication efficiency and reliability.


Mport3208 offers extensive network management functions through WEB configuration, including serial port/network working mode, serial port forwarding, DNS, log management, system management, and more. It supports various conversion modes such as UDP/UDP Multicast, TCP Client/Server, Modbus RTU Master/Slave, Modbus ASCII Master/Slave, RealCOM, MCP/CCP/MW, Pair Connection Master/Slave, HTTPD Client, WebSocket Client, MQTT, and others.


Designed with industrial-grade components, Mport3208 provides wide temperature and pressure range, lightning resistance, anti-electromagnetic interference, high reliability, and high performance, making it suitable for harsh field environments. It is ideal for industrial monitoring, traffic management, meteorology, water treatment, environmental monitoring, coal mining, oil, chemical, and new energy industries, enabling field data collection, remote monitoring, and field control. Mport3208 is a crucial industrial communication product for the development of the Industrial Internet of Things (IIoT).

Features and Benefits


  1. Adopt 32-bit ARM Cortex-M7 core, running frequency up to 528MHz
  2. Dual network ports can be configured as two independent network segments or cascade ports
  3. 600bps~460800bps baud rate range
  4. Support UDP/UDP Multicast mode, achieving point-to-point, point-to-multipoint or multipoint-to-multipoint communication thru the UDP protocol
  5. Supports TCP Client/Server mode, establishing session connection through TCP protocol, TCP Client/Server supports up to 8 session connections, and support dynamically modify serial rate and other communication parameters thru RFC2217 instructions
  6. Support Pair Connection Master/Slave mode, devices can be used in pairs, easy to operate
  7. Support Modbus RTU/ASCII Master/Slave mode, realizing Modbus TCP and Modbus RTU/ASCII protocol conversion
  8. Support Modbus Salve pre-read, single port automatic learning up to 128 RTU or 64 ASCII instructions, to achieve quick response
  9. Support RealCOM MCP/CCP/MW mode, mapping network for local COM, seamless connection
  10. Support HTTPD Client mode and perform GET or POST operation with HTTPD server
  11. Support WebSocket Client mode for two-way communication WebSocket server
  12. Supports multiple sub-packaging mechanisms, converting serial port data into Ethernet data packets according to data length or time, to meet the real-time needs of different networks
  13. Support package registration and heartbeat packages to realize connection verification and connection status detection
  14. Support Modbus virtual ID, mapping Modbus slave real ID to virtual ID for data communication, to avoid slave ID duplication
  15. Support serial communication parameters, operating modes, sending and receiving frame counts
  16. Support local log storage, network storage, USB flash drive storage and serial port log output





Network Protocol


IP Obtaining Method

Static IP/DHCP




Web page configuration

Simple Transparent Transmission

UDP/UDP Multicast/TCP Client/ TCP Server/RealCOM/ Pair Connection


Modbus RTU /ASCII to Modbus TCP

Serial Port Packaging Mechanism

Time and length can be set, the maximum packing length is 1460 bytes

TCP Server

Each serial port can connect up to 8 TCP Client

Network Buffer

Send: 16Kbyte; Receive: 16Kbyte

Serial Buffer


Heartbeat Package

Support TCP Keep alive mechanism, customize heartbeat package  content

Registration Package

Customize the content heartbeat package content



HTTPD Client


WebSocket Client



Support Maiwe/Moxa working mode


Support Alibaba MQTT Cloud Platform as well as other standard MQTT cloud platforms

Serial to Serial Data Forwarding

Support (prohibit, bidirectional forwarding, unidirectional forwarding, unidirectional receiving)

Transmission Delay


Supported Software

NMS configuration tool, Vitualcom software, MixView, MaxView


100M Copper Port

2*10/100 Base-T(X) auto-sensing RJ45 ports, support full/half duplex and auto MDI/ MDI-X

Serial port

Port type: 8×RS232/485

Connector: 5-position 5.08mm pitch terminal block

Baud rate: 600bps~460800bps

Data bit:7bit, 8bit

Stop bit:1bit, 2bit

Parity bit: None, Odd, Even, Mark, Space


1 Type-A USB 2.0 interface, can be used to store logs


One-click restart, factory reset

Status LED

Power supply indicator, running indicator, Ethernet port indicator, serial port indicator

Power Supply

Input Voltage


Power Consumption



AC socket with switch

Physical Characteristic


482.6×44×210 mm (include mounting clips)


19 inn 1U rack mount installation

IP Code


Working Environment

Operating Temp


Storage Temp


Relative Humidity

5%~95% (non-condensing)

Industrial Standard


IEC 61000-4-2 (ESD): Level 4

(contact discharge ±8kV, air discharge ±15kV)

IEC 61000-4-5 (Surge): Level 3

(power supply: common mode ±2kV, differential mode ±2kV;

RS485: common mode ±4kV, differential mode ±4kV;

Network port: common mode ±6kV, differential mode ±2kV)

IEC 61000-4-4 (EFT): Level 4

(power supply: ±4kV; network port, serial port: ±2kV)










Standard Model

10/100M Copper Port

RS232/485 Port

Input Voltage




Single AC85~264V/DC110~370V power supply


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