Resources

What is the difference between M-Bus and MODBUS communication outputs?

08 December 2020

  • Share Twitter
  • Share facebook.
  • Share linkedin
  • Share whatsapp

What is the difference between M-Bus and MODBUS communication outputs?

20120810470346513.png

We have summarised the differences between M-Bus and MODBUS (Wired and Wireless)

M-Bus Communication

M-Bus is a communication protocol used between meters and the central data collection system or Pre-Payment unit. Widely used on new projects where the building infrastructure can be designed accordingly.

M-Bus is available on a wide variety of gas, heat, electricity, and cold/hot water meters.

       Transfer of energy or consumption data

       2-Wire hard-wired system or Wireless

       Max. 250 meters per network master (multiple masters possible)

       Up to 2000m cable (2km) per master

Main advantage:

More flexible then MODBUS (EU standard)

with multiple manufacturers meters

interchangeable within the network.  

Wireless capability. 

Advantages

       Simple principle - easy to install

       Bi-directional communication for setup and updates

       Robust data collection

Disadvantages

       Costly to change if not installed correctly from the design phase

       Sensitive on electromagnetic interference

       More difficult/costly in retrofit applications

20120810472793258.png

 

MODBUS/BACnet Communication

BACnet or MODBUS RS485 is a communication protocol used between mainly electricity meters but also widely used on heat systems involving a central building management services (BMS)

MODBUS is widely available on electricity meters which is where the communication protocol was developed. It is now being developed on other metering devices involving heat networks.

       Transfer of kWh data, kV factors, Single Phase, Three Phase

       2-Wire / 3-Wire hard-wired system Max. 250 meters per network master (multiple masters possible)

       Long distance cable capability

Main advantage:20120810474883267.png

Speed of data collection, with large

volumes of data collectable remotely

within a matter of seconds.

Advantages

       BMS Standard so everyone has knowledge

       Fast Data Transfer for instant profiles

       Robust data collection

       Can be mixed with different devices on the same network

Disadvantages

       Costly due to certain equipment required

       More stable if fewer devices are on multiple MODBUS controllers

       Difficult to set up if no past knowledge

 

  20120810482096388.png

 

BACnet or MODBUS RS485 is a communication protocol used between mainly electricity meters but also widely used on heat systems involving a central building management services (BMS)

Wireless M-Bus is starting to be widely used on new build systems but mainly on retrofit systems that can’t have a wired network as this would become expensive

       Wireless OMS output that can talk to all OMS data collectors

       Mixed meter manufacturers on the same networks

       Up to 800 meters on one network

Main advantage:

No wires installed, installation remote

No disruption to tenants

 

If you would like to know more about the options for remote reading and data collection, give our team a call.

View our data collection range here. 

DMS Metering Solutions / 01773 534555 / www.dmsltd.com / sales@dmsltd.com


Related questions - What is m bus protocol? What is M-bus? What is wireless M-Bus?


Achilles UVDB Stamp Silver Plus
British Chambers of Commerce
CPD
Construction Online
DMS LTD Create Membership Member
EUA Utility Networks
GSHPA
Honney wells
Honney wells
Heat Pump Federation
IGEM Industrial Affiliate
ISO-9001 CERTIFICATION
UKDEA

Cookies

Not the tasty chocolate chip kind, but important for you to know - we use cookies to offer you the best experience possible when shopping with us.
Continue to browse if you're happy with our Privacy & Cookie Policy.