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iSMA-B-MG-IP was developed to simplify the connection of meters to building management systems. Using the two most popular communication protocols (M-Bus and Modbus), it enables the simultaneous management of up to 180 different types of meters. The device's M-BUS interface is capable of powering 60 M-BUS devices and communicating with them. The maximum current consumption cannot be more than 130 mA.

The RS485 interface 128 can handle Modbus devices.

The built-in TCP/IP interface makes it possible to use the device on the existing LAN infrastructure and to build extensive monitoring systems with its help.

The configuration of the iSMA-B-MG-IP device can be done through its built-in web interface, but also with the free iSMA Configurator software.

Main features:

  • M-Bus TCP/M-Bus gateway

  • Modbus TCP/IP/ Modbus RTU/ASCII gateway

  • Up to 180 different types of meters

  • The two different gateways work in parallel in the device. 

  • Built-in power supply for supplying 60 M-Bus meters

  • Direct connection to up to 6 M-Bus branches

  • Built-in Mini USB port for configuration and device firmware update.




  • 12 screw terminal blocks up to 2.5mm2 wire cross section .   Direct connection to up to 6 M-Bus branches

  • 1 RS-485

  • 1 RJ45

Supported devices

  • Up to 60 M-Bus meters

  • Up to 128 Modbus (slave) devices


Galvanic isolation

  • 3 kV AC/DC on all interfaces and power supply



  • M-Bus Master interface according to EN 13757-2

  • RS485 half duplex

  • Protocols: M-Bus and Modbus

  • M-Bus speed from 300 to 38400 bps

  • Modbus speed: from 2400 to 115200 bps


  • ARM Cortex-M3

Supply voltage

  • 24 V AC/DC

Device housing

  • Dimensions (WxDxD) MIX18: 35x110x62 mm

  • Material plastic, self-extinguishing (PC/ABS)

  • DIN rail mountable (according to DIN EN 50022 standard)

  • Cooling: internal air circulation

Environmental parameters

  • Operating temperature: -10°C to 50°C

  • Storage temperature: -40°C to 85°C

  • Relative humidity: from 5% to 95%, non-condensing

  • IP protection: IP40 - for indoor use

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