M-Bus  Master  / M-Bus converter

The M-Bus is a bus optimized for the reading of measurement instruments like energy counters, hot and cold water counters, gas, pressure, sensors and actuators, etc. Nowadays, more and more manufacturers implement the M-Bus interface in their counters, making it the ideal basis
for remote reading applications. Our M-Bus Master (M-Bus converter) is universal and simple M-Bus Master that can be connected up to 250 M-Bus devices. This device also convert M-Bus signal to RS232 or RS485 so basically you can integrate this device in your remote data acquisition systems with ease.

Main features:

– RS485 / RS232 transmission direction: Automatic
– MAX amount of M-Bus devices: Up to 250 units of any M-BUs devices (375mA)
– M-Bus short connection protection: Yes
– Power supplier: 90-250V ~, 50-60Hz
– Mounting type: on DIN rail

Download Datasheet 


M-Bus Master / M-Bus Converter is dedicated to convert M-Bus signal to RS232/RS485 and vice versa. Up to 250 M-Bus devices can be connected to M-Bus Master / M-Bus Converter.


If you have any questions, feel free to contact us at: kundtjanst(at)2flow.se

DescriptionM-Bus to RS232 / RS485 converter technical specification
M-Bus permissible loadup to 250 units of any M-Bus devices (375 mA)
RS485 / RS232 direction controlAuto
Protection of MBus short connectionYes, triggering current 500 mA
Short connection reaction timeProgrammable – 1 – 4s (recover 10 – 60s)
M-Bus line voltageMark – 36 – 40 V. Space 24 – 27 V
Data transfer speedFrom 300 to 9600 bods
Galvanic isolationPower– RS232 / RS485 Power – M-Bus M-Bus – RS232 / RS485
Insulation breakdown voltage> 1,5 kV
Power supplier90-250V~, 50-60Hz
Power consumptionNot loaded up to 3,5W, fully loaded up to 20W
EnclosureDIN rail mountable
Dimensions45 mm x 75 mm x 110 mm
Operating conditionsFrom – 30 oC to 50 oC / 80 % RH, without condensate