4 Port serial RS232/RS485 server with Modbus gateway

Mport 3104




  • 4  RS232/485 Serial ports
  • 6kV lightning protection on Ethernet interface
  • Provides Modbus RTU/ASCII to Modbus TCP conversion
  • VirtualCOM software management
  • DC power supply DC9 ~ 36V


The Mport3104 is designed for serial devices that require centralized monitoring over a network. It supports 4 serial connections at speeds between 600 and 460,800bps.  The serial ports may be individually set to RS232 or RS485.  The security of data transmission becomes more and more important when a large number of serial devices are connected to the network. The Mport3104 provides encryption to ensure the secure and stable networking of serial devices. Mport 3104 serial networking server is a terminal server with one 10/100M Ethernet port and four asynchronous serial ports.

Serial Server Drawing








Technical Notes

Modbus Notes

Modbus TCP / RTU integration

Since its inception in 1979 Modbus has become a widely used communication protocol in the field of industrial automation. Originally based on serial interfaces (RS232 and RS485) Modbus RTU enjoys widespread use throughout many different industries. Since then Ethernet has become the network of choice and many industrial devices now have native Ethernet interfaces.

Ordering Information

Order Code Description
MW-3104 4 Port serial server with Modbus Gateway

Quick Start Guides

Mport - Quickest way to connect 2 serial devices over Ethernet

The Mport range of serial devices servers have a mode of operation that allows very quick provisioning of 2 units to create a serial tunnel over an Ethernet network.

This 'Pair Connection Mode' is easy to setup.

On one Mport configure its mode of operation to be 'Pair Connection Master'

More Information