M-Bus Master

M-Bus Master

by sales.aus@protoconvert.com

Product Description

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


M-Bus Master 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.


  • RS485 transmission direction: automatic
  • MAX amount of MBus devices: 250 (375ma)
  • MBus short connection protection: yes
  • Power supplier: 90-250V ~, 50-60Hz
  • Mounting type: on DIN rail


RS-232 Up to 15m, speed up to 9600 bods
RS-485 Automatic chose of direction, max 32 transivers, speed up to 9600 bods
M-Bus Up to 250 loads (375ma)
LED Indication
Offline M-Bus not loaded (ON)
Overload M-Bus short connection
Operating M-Bus power (ON/OFF)
RXD M-Bus data transfer
TXD M-Bus data receive
Power Supply 90-250V~,50-60Hz
Over Voltage protection >1000V
Power Consumption 300ma MAX
M-Bus line power Mark 36-40V, space 24-27V
Adjustment to M-Bus loads Automatic
M-Bus short circuit event current ≥500ma
M-Bus short circuit reaction time Configurable, 1-4s
Recover after short connection Configurable, 10-60s
Galvanic Isolation between
Power and RS232/RS485
Power and RS232/RS485 Power and M-Bus
M-Bus and RS232/RS485
Physical Characteristics
Dimensions 105x75x45mm
Weight 170g
Case fixing type DIN32
Protection type IP20
Climate Conditions
Operating Temperature -20 ~ 50 oC
Storage Temperature 50 ~ +70 oC
Humidity Range 5-95%, non-condensing
Warranty period 2 Years