Meter Gateway with built-in M-Bus gateway (power supply for up to 60 devices) and Modbus TCP/IP to Modbus RS485 gateway. 1x ETH, 1x M-Bus, 1x RS485. Power supply 24 V AC/DC.
Manufacturer: iSMA Controlli
Delivery date: 1-2 days
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iSMA-B-MG-IP device has been designed to simplify the connection of meters installation with BMS.  By applying the most popular interfaces for M-Bus and Modbus meters, the meter gateway allows to handle up to 180  meters (7086.62 in) of various types simultaneously.  The M-Bus interface allows to communicate and supply with power up to 60 M-Bus meters (2362.21 in).  The maximum current may not exceed 130 mA. The RS485 interface allows to connect up to 128 Modbus devices.  The device address and baud rate for Modbus are set by using DIP switches.

The built-in TCP/IP interface provides the ability to use the existing LAN infrastructure, also allows to build a scattered meters monitoring systems. iSMA-B-MG-IP device configuration is possible from the built-in web services level, and by using free tool such as iSMA Configurator.

Technical data


  • 12x screw connector max. 2,5 mm2 (18 – 12 AWG)

Direct connection for up to 6 M-Bus branches

  • 1x RS485
  • 1x RJ45

Supported devices

  • Up to 60 M-Bus meters
  • Up to 128 Modbus Slave devices

Galvanic isolation

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


  • ARM Cortex-M3

Power supply

  • 24 V AC


  • Interface Bus Master according to EN 13757-2
  • Interface RS485 half duplex
  • 1x Fast Ethernet
  • Protocols: M-Bus and Modbus
  • M-Bus baud rate: 300 to 38400 bps
  • Modbus baud rate: 2400 to 115200 bps


  • Dimension: 37x110x62 mm (1.457×4.331×2.441 in)
  • Construction: plastic, self-extinguishing (PC/ABS)
  • DIN rail mounting (DIN EN 50022 norm)
  • Cooling: internal air circulation


  • Operating temperature: -10°C to 50°C (14°F to 122°F)
  • Storage temperature: -40°C to 85°C (-40°F to 185°F)
  • Relative humidity:  5% to 95%, no condensation
  • Ingress Protection Rating: IP40 – for indoor installation


  Release Notes

  Declaration of Conformity

  Installation Instructions