Mport3101R,RS232/485 to Ethernet Server
  • 1×RS232/485 Serial Port,1×100M Ethernet Copper Port
  • Industrial Serial Server with Modbus Function
Features and Benefits
  • Support serial terminal device networking, can convert UDP, TCP, Modbus, HTTPD, WebSocket protocols, and support virtual serial ports
  • Support conversion between Modbus RTU/ASCII and Modbus TCP protocols, and support Modbus RTU/ASCII Over TCP transparent transmission
  • External independent hardware watchdog design to prevent crashes
  • Industrial grade DC9-36V power supply and anti reverse connection protection
  • Support a wide working temperature range of -40 ℃ to +85 ℃
  • Overview
  • Specifications
  • Downloads
  • Models
Product Description

Mport3101R is a din-rail 1* RS232/485 Ethernet serial server, using a 32-bit Arm Cortex-M7 core, with the main frequency up to 400MHz, and an external hardware watchdog design. The power supply, network port, and serial port all have high-level ESD, surge and EFT protection, strong anti-interference ability, and are designed to provide data transmission between serial port and Ethernet for industrial users. This product supports 1xRS232/485/422 serial port and 1x100Mbps copper port. It integrates the TCP/IP protocol stack internally, making it convenient, flexible, and fast to connect to Ethernet for RS232/485/422 devices.


This industrial grade Ethernet serial server supports WEB configuration for various network management functions, such as serial/ethernet working mode, DNS, network logs, serial port restart, system management, etc. It supports conversion modes of UDP/UDP Multicast, TCP Client/Server, Modbus RTU Master/Slave, Modbus ASCII Master/Slave, RealCOM_MCP/CCP/MW, Pair Connection Master/Slave, HTTPD Client and WebSocket Client, to convert serial ports to Ethernet or Modbus TCP protocol. In terms of core components, this product adopts an industrial grade quality design scheme, which has many advantages such as wide temperature and pressure, lightning resistance, electromagnetic interference resistance, high reliability, high performance, and suitability for operation in harsh environments. It can be used in industrial monitoring, traffic management, meteorology, water treatment, environmental monitoring, coal mining, petroleum, chemical, new energy and other industries, for remote on-site data collection, remote monitoring, on-site control, etc. It is an essential industrial communication product for the development of industrial Internet of Things.

Features and Benefits
  1. Adopt 32-bit ARM Cortex-M7 core, running at a frequency up to 400MHz
  2. Serial port supports baud rates ranging from 600bps to 460800bps
  3. Support UDP/UDP Multicast mode, enabling fast and efficient point-to-point, point-to-multipoint, or multipoint-to-multipoint communication through UDP protocol
  4. Support TCP Client/Server mode, establishing session connections through TCP protocol. TCP Client supports up to 4 session connections, TCP Server supports up to 8 session connections, and supports RFC2217 instructions to dynamically modify communication parameters such as serial port baud rate
  5. Support Pair Connection Master/Slave mode, allowing devices to be used in pairs with simple operation
  6. Support Modbus RTU/ASCII Master/Slave mode, enabling conversion between Modbus TCP and Modbus RTU/ASCII protocols
  7. Support Modbus slave pre-reading, single port automatic learning up to 32 RTU or 16 ASCII instructions, achieving fast response
  8. Support RealCOM_ MCP/CCP/MW mode, mapping network to local COM, seamless connection
  9. Support HTTPD Client mode and can perform GET or POST operations with HTTPD servers
  10. Support WebSocket Client mode and can communicate bi-directional with WebSocket servers
  11. Support various subcontracting mechanisms to convert serial port data into Ethernet packets based on data length or time, meeting real-time requirements of different networks
  12. Support registration and heartbeat packets, enabling connection verification and connection status detection
  13. Support Modbus virtual IDs, mapping Modbus slave real IDs to virtual IDs for data communication, avoiding duplicate slave IDs
  14. Support serial communication parameters, working mode, sending and receiving frame statistics


Network Protocol


IP Obtaining Method

Static IP/DHCP

Domain Name Resolution


User Configuration

Web configuration

Simple Transparent Transmission

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


Modbus RTU/ASCII to Modbus TCP

Serial Packaging Mechanism

The time and length can be set. The default value varies based on the baud rate. Maximum packaging length 1460 bytes

TCP Server Connection

Single serial port supports up to 8 TCP client connections

Network Cache

Send: 16Kbyte; Received: 16Kbyte

Serial Cache

Send: 1.5Kbyte; Received: 1.5Kbyte

Heartbeat Package

Support TCP Keepalive mechanism and customize heartbeat packet content

Registration Package

Custom registration package content



HTTPD Client


Websocket Client



Support working modes such as Maiwe, Moxa and Kanghai


Transmission Delay


Supporting Software

Network management configuration tool, virtual serial port software, MixView, MaxView


100M Copper Port

1x10/100Base-T(X) auto-sensing RJ45ports, support full/half duplex, auto MDI/MDI-X

Serial Port

Serial port type: 1 RS232/485

Connection method: 5.08mm pitch 5-pin terminal block

Baud rate: 600bps~460800bps

Data bits: 7bit, 8bit

Stop bit: 1 bit, 2 bit

Check bits: None, Odd, Even


One-click restart or factory reset

Status LED

Power indicator

Operation indicator

Ethernet interface speed and connection/activity status indicator

Serial port sending and receiving data indicator

Power Supply

Input Voltage


Power Consumption



5.08mm pitch 2-pin terminal block

Physical Characteristics


87.5×36.5×58.7mm (Din-rail mounting clip excluded)


35mm standard Din-rail mounting

IP Code


Working Environment

Operating Temp


Storage Temp


Relative Humidity

5%~95% (non-condensing)

Industry Standard


IEC 61000-4-2 (ESD): Contact discharge ±4kV, air discharge ±4kV

IEC 61000-4-5 (Surge): Power supply: Differential mode ±2kV

RS485: Differential mode ±2kV

Ethernet port: differential mode ±2kV

IEC 61000-4-4 (EFT): Power supply: ±0.5kV

Data port: ±0.5kV






Mport3101R Datasheet


Mport3101R&3102R User Manual

Version 5.0

Standard Model

100M Copper Port


Input Voltage





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