M-Bus to Modbus (RS485) Converter

M-Bus to Modbus (RS485) Converter


  • Automatic RS485 transmission direction
  • M-Bus short connection protection
  • Power supply: 12 - 36 VDC
  • Mounting type: on DIN rail

  • Description
  • Specification

M-Bus to Modbus RTU (RS485) Converter is dedicated to convert M-Bus signal to Modbus (RS485) and to allow M-Bus devices to communicate on a Modbus network.

The M-Bus is a bus optimized for the reading of measurement instruments like energy meters, hot and cold water meters, gas, pressure, sensors and actuators, etc. Nowadays, more and more manufacturers implement the M-Bus interface in their meters, making it the ideal basis for remote reading and smart metering applications.

Main features:

Device versions:

  • MB10 Converter dedicated to support up to 10 units of M-Bus meters
  • MB100 Converter dedicated to support up to 100 units of M-Bus meters
  • MB250 Converter dedicated to support up to 250 units of M-Bus meters

Technical features:

  • Automatic RS485 transmission direction
  • M-Bus short connection protection
  • Power supply: 12 - 36 VDC
  • Mounting type: on DIN rail

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M-Bus to Modbus (RS485) converter dedicated to take data from M-Bus devices and to convert signal to Modbus.

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In the schematics below is indication of the M-Bus to Modbus converter wiring schematics.

M-Bus permissible load up to 10 / 100 / 250 units of any M-Bus devices
RS485 direction control Auto
Protection of MBus short connection Yes, triggering current 500 mA
Short connection reaction time Programmable - 1 - 4s (recover 10 - 60s)
M-Bus line voltage Mark - 36 - 40 V. Space 24 - 27 V
Data transfer speed From 300 to 9600 bods
Galvanic isolation Power– RS485 Power – M-Bus M-Bus - RS485
Insulation breakdown voltage > 1,5 kV
Power supplier 12 - 36 VDC
Power consumption Not loaded up to 3,5W, fully loaded up to 20W
Indication LED
Enclosure DIN rail mountable
Dimensions 45 mm x 75 mm x 105mm
Operating conditions From - 25 oC to + 60 oC / 95% RH, without condensate
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