Mport3216-I, 16-Port Opto-Isolated RS485/422 Serial Server
  • 16×RS485/422 Ports, 2×Gigabit Combo Ports
  • Rack Mount 1000M Serial Server
Features and Benefits
  • Support serial port terminal device networking
  • Support UDP, TCP, Modbus, HTTPD, WebSocket, MQTT, 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 +70°C
  • Overview
  • Specifications
  • Downloads
  • Models
Product Description

Mport3216-I is a dual-network 16*RS485/422 rack mount Ethernet serial port server. It uses a 32-bit dual-core Arm Cortex-A8 core with a main frequency of up to 800MHz and an external hardware watchdog design. The power supply, network port, and serial port all have high-level ESD, Surge, and EFT protection and strong anti-interference capabilities. It is designed to provide data transmission between multiple serial ports and Ethernet for industrial users. It transforms serial to Ethernet compatible signals that allow them to be used remotely by network-attached applications and machines. Mport3216-I serial server supports 16 RS485/422 serial ports. The 16 RS485/422 ports can work independently at the same time in different working mode and baud rate range from 300bps to 460800bps. The two Gigabit Ethernet combo ports can work as either Gigabit copper ports or Gigabit fiber ports. The 16 port serial server integrates TCP/IP protocol stack, so that RS485/422 serial devices can be easily, flexibly and quickly connected to Ethernet, making industrial communication more smooth, more reliable, faster, and meet the needs of customers to improve value-added applications.

Mport3216-I Ethernet serial server supports WEB configuration of a variety of network management functions, such as serial port/network working mode, serial port forwarding, network card mode, DNS, access control, IP/MAC filtering, log management, email alarms, SNMP alarms, system management, serial port restart and etc.; It supports 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, DDP/DC and other conversion modes to realize serial port to Ethernet or Modbus TCP protocol It is designed with industrial-grade components, featuring wide temperature and wide pressure range, lightning resistance, anti-electromagnetic interference, high reliability, high performance, suitable for operation in harsh field environment like industrial monitoring, traffic management, meteorology, water treatment, environmental monitoring, coal mine, oil, chemical, new energy industries, to help user conduct field data collection, remote monitoring, field control, etc.. It is an essential industrial communication products for the development of industrial Internet of Things.

Features and Benefits
  1. Adopt 32-bit dual-core ARM Cortex-A8 core, running frequency up to 800MHz
  2. The network port is a Gigabit Combo ports, and can be configured as two independent network segments or cascading ports
  3. 300bps~460800bps baud rate range available
  4. Support UDP/UDP Multicast mode, achieving point-to-point, point-to-multipoint or multipoint-to-multipoint communication thru the UDP protocol
  5. Support TCP Client/Server mode, establishing session connection through TCP protocol, TCP Client/Server supports up to 8 session connections, and support dynamically modify serial port 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 32 RTU or 16ASCII 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 with WebSocket server
  12. Support DDP/DC mode, encapsulate serial port data through DDP/DC protocol to achieve communication with DDP/DC server
  13. Support Modbus virtual ID, mapping Modbus slave real ID to virtual ID for data communication, to avoid slave ID duplication
  14. Support multiple sub-packaging mechanisms, convert serial port data into Ethernet data packets according to data length or time, to meet the real-time needs of different networks
  15. Support package registration and heartbeat packages to realize connection verification and connection status detection
  16. Support WEB/SSH access control, and IP/MAC address filter
  17. Support device reboot, login event, configuration change, password change and other event alarms, support for e-mail and SNMP alarm mode
  18. Support serial communication parameters, operating modes, sending and receiving frame counts
  19. Support local log storage, network storage, USB flash drive storage and serial port log output



Network Protocol


IP Obtaining Method

Static IP/DHCP



User Configuration

WEB/CONSOLE 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 Connection

Each serial port can connect up to 8 TCP Client

Network Buffer

Send:16Kbyte; Receive: 16Kbyte

Serial Buffer

Send:2Kbyte; Receive:2Kbyte

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

Data Encryption

Support (DES/3DES/AES/RC2/RC4/RC5/BlowFish and etc.)

SSL Encryption

Support (TLS1.0/TLS1.1/TLS1.2)


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


1G Combo Port

2*1G combo ports, 10/100/1000 Base-T(X) auto-sensing RJ45 port or 1000Base-X SFP port optional, RJ45 ports support full/half duplex, auto MDI/ MDI-X

Serial Port

Port type: 16×RS485/422

Connector: 5-pin 5.08mm pitch terminal block

Baud rate: 300bps~460800bps

Data bit: 5bit, 6bit, 7bit, 8bit

Stop bit: 1bit, 2bit

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

Isolation voltage: 2kVAC/3kVDC


1 Type-A USB 2.0 interface


One-click restart, factory reset

Console Port

1 port console port, RS232 signal RJ45 port

Status LEDs

Power supply indicator, running indicator, alarm, 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 brackets)


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;

RS485/422: 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)







MPort3216-I User Manual

Version 5.0




Standard Model

1G Combo port

RS422/485 Port

Input Voltage




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


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