Wired M‑Bus to NB‑IoT

The ACRIOS M-Bus to the NB-IoT (Narrow Band IoT) converter is designed for an efficient readings of any wired M-Bus meters – typically electricity meters, water meters and heat meters, particularly in the district heating and water industries. The device allows the integration of traditional M-Bus meters into the NB-IoT wireless network, facilitating the data collection on consumption in intervals as short as fifteen minutes.

The solution from ACRIOS Systems significantly reduces the total cost of ownership (TCO) for projects requiring frequent remote readings of M-Bus meters, thanks to features like remote configuration, plug-and-play setup and WAGO terminals for a quick installation.

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How does it work?

WAGO connector – the industry-standard terminal block for a quick and secure connections. It shortens the installation time and helps to eliminate mistakes caused by the insufficient wire tightening in the terminal block.

NB-IoT connectivity – now offers coverage almost everywhere, reaching even into basements and SIM cards can be obtained for as little as 1 EUR per year.

The antenna connector is designed to minimize losses, ensuring the highest possible reception sensitivity. This allows you to use the device inside a heat exchange station while still maintaining a strong signal.

Thanks to the standard SMA connector, you can use a cable to extend the antenna from the hard-to-reach places.

For the installations without an electrical power supply, the converter is available in a battery-powered version, ensuring a long battery life even with the frequent data readings.

IP67 waterproof enclosure for the outdoor installations – ideal for the mounting on the wall of a heat exchange station.

Data filtering at the hardware level using the VIF and the DIF values for the efficient shortening of the M-Bus message. The message remains standardized and can be processed by any M-Bus parser.

The converter, with a support for the M-Bus standard, is compatible with various meters from different manufacturers, ensuring the versatility and the easy integration.

Support for up to 16 connected devices, providing maximum installation flexibility and ensuring that you won't need to return for a second device if there's one more meter than expected.

Screws that won't fall out of the cover during installation make the assembly easier and ensure that the IP rating of the converter is not compromised.

For the demanding applications, a version with an external power is available, providing the continuous power supply to the M-Bus.

Choose ACRIOS Systems converters. Here’s why

Cyber resilience act

We have a full control over each part of the code in our devices. The hardware we produce can be maintained even many years after installation.

Manufactured in the EU

Our converters are manufactured in the Czech Republic with Czech subcontractors. Each unit undergoes final testing while focusing on the functionality of individual communication interfaces and device power consumption.

Total cost of ownership

We pay close attention to the TCO - from using a coulomb counter to obtain an accurate battery life to the pre-configured units delivery with your settings.

Remote configuration

Set the primary or the secondary addressing of meters over the LoRaWAN network, find out how many meters are connected or change the reading period directly from your system without the need for local configuration.

We adhere to the standard

We forward the data as a standard M-Bus frame, either shortened by the desired VIF DIF values or in full pack. This allows any M-Bus parser to be used for the data interpretation, needless to say that we can provide you the parser to facilitate the easiest possible onboarding.

Technical support

Good technical documentation is the foundation of quick integration. On our Wiki, you'll find integration manuals, communication protocol descriptions and videos explaining the usage.

The hassle-free readings

We can read up to 16 connected devices with a single converter, giving you maximum flexibility during installation without the need of a converter for each meter, thus reducing the project costs.

Technical specifications

  • Support for reading any M-Bus meter according to the M-Bus standard
  • M-Bus powered directly from the device, no external power source needed
  • Readings with intervals of up to 15 minutes
  • WAGO terminal block for quick and reliable installation
  • Battery-powered or externally powered versions available
  • VIF DIF message filtering at the converter level
  • NB-IoT (Narrow Band) communication with the possibility to use any NB-IoT SIM card
  • Default configuration is plug & play for connecting a single meter via broadcast
  • Remote configuration capability for primary or secondary addressing
  • User-replaceable battery in the battery-powered versions
  • SMA standard antenna connector
  • Dimensions: 145 x 90 x 55 mm
  • Weight: 336 g with battery
  • IP Rating: IP67
  • Power Supply: D-Cell battery 19,000 mAh, 2x D-Cell batteries 38,000 mAh, or external power supply 85-305V AC
  • Supported Standards: M-Bus EN 13757-3
  • Maximum Number of Devices: 16 UL
  • Features: Transparent mode, VIF/DIF filtering, secondary addressing, primary addressing, wildcards, broadcast polling
  • NB-IoT: 3GPP rel. v.14
  • ABB B21
  • ABB B23
  • ABB B24B-Meters HYDROCAL-M3
  • Calec ST II
  • Comac Cal Flow 38
  • Comac Cal Flow 45
  • Danfoss SonoMeter 31
  • Diehl Sharky 773
  • Diehl Sharky 774
  • Diehl Sharky 775
  • Elster F50
  • Elster F90
  • Engelmann SensoStar 2
  • Engelmann SensoStar U
  • GWF UnicoSynergy
  • Honeywell EW557
  • INEPRO METERING PRO380-Mb
  • INEPRO METERING PRO1-Mb
  • Noark Ex9EMS MB
  • Ista Sensonic II
  • Ista ultego III smart (ultego 3 smart)
  • Itron Cyble M-Bus v2
  • Kamstrup Miltical 603
  • Kamstrup Multical 403
  • Landys&Gyr E350
  • Landys&Gyr UH30
  • Landys&Gyr UH50
  • Schneider Electric CS 30323
  • Scylar INT8
  • Sensus PolluTherm 200
  • Siemens WSD300
  • Sontex Supercal 5 l
  • Sontex Supercal 739
  • ZENNER Zelsius C5
Legacy products
  • ACR-CV-101N-M-D / M-Bus to NB-IoT single battery pack
  • ACR-CV-101N-M-D2 / M-Bus to NB-IoT double battery pack‍
  • ACR-CV-101N-M-EAC* / M-bus to NB-IoT externally powered

*Under MOQ

  • 1x M-Bus to NB-IoT converter
  • 1x installation manual
  • 1x Battery (for battery powered units)
  • 1x NB-IoT antenna

From common issues to proven solutions

If you've ever searched for a solution for the wired M-Bus meters—such as heat meters or water meters—and their connection to a LoRaWAN network, you have likely encountered the following situations:

Typical customer scenarios

M-Bus installation is slow, costly, and depends on specialists.

Each network combines meters with different behaviour in addressing, timing, and bus power. Technicians must fine-tune everything manually, every project needs an expert, rollouts can’t scale, and costs increase.

Our solution

Our converters include an installation wizard that automatically detects all connected meters.

It identifies the correct primary and secondary addressing, sets timing and bus voltage levels. The technician simply follows the guided process, no training required.

Typical customer scenarios

No electricity is available at the installation site, conventional concentrators can’t be used.

In heat exchangers, shafts, or older buildings there is often no power source. Standard M-Bus concentrators require 230 V which means extra wiring, inspections, and project delays.

Our solution

Our converter powers the M-Bus line from its own battery.

No external power source is needed, installation takes only a few minutes, without cables or electrical inspections.

Typical customer scenarios

NB-IoT projects often fail due to SIM cards, signal, or integration issues.

NB-IoT sounds simple, but in reality SIM configuration, APN setup, firewalls, certification, or signal coverage often cause complications. Integration with operators becomes complex, wasting time and resources.

Our solution

We have extensive experience with NB-IoT deployment.

We deliver preconfigured devices with your SIM card, verify coverage, resolve APN setup, and send data in an open format directly to your system, without relying on third-party clouds.

Typical customer scenarios

Meter replacement requires on-site setup and additional costs.

After several years, meters must be replaced and standard concentrators need manual reconfiguration on site. This leads to service trips, expenses, and delays.

Our solution

ACRIOS enables remote configuration and updates via NB-IoT.

When a meter is replaced, there is no need to visit the site. The new meter can be added or re-addressed remotely.

Selected projects

We offer the ACRIOS remote reading solutions to all of our customers who want to comply with the EED decree. The solution is quick to install, requires no training and proves to be stable over time.

Jaroslav Brzokoupil, CEO

ACRIOS’ reliable products for remote readings and innovative, fully customizable solutions perfectly complement our expertise in value-added distribution of IoT products and solutions. We are proud to collaborate with a company that shares our commitment to excellence and customer satisfaction.

Ivana Janković Šafarić, CEO

"The remote gas meter reading devices from ACRIOS have proven their reliability and quality of workmanship. We appreciate that all our technical requirements were met and that we received all the necessary documentation and technical support for integration into our information system. We are very satisfied with the cooperation..“

Michal Volný, Head of Technical Services

ACRIOS was instrumental in our success on a large-scale European deployment of the wM-Bus concentrators, helped to solve all of the technical challenges and deliver results within the set deadlines.

Lukas Mickus, Project manager

“The ACRIOS scripting capabilities have provided Netmore with the required solution for solving integrations with MBUS/MODBUS units.”

Jimmy Björklund, Lead Solution Architect at Netmore

We successfully integrated the ACRIOS Data Concentrator into our smart metering project, seamlessly connecting hundreds of meters. The device’s performance and stability have been outstanding, even in challenging environments. The LoRaWAN protocol used by the concentrator ensures strong, reliable signal coverage, even in hard-to-reach areas. We highly recommend the ACRIOS Data Concentrator to anyone looking to enhance their smart metering infrastructure.

Iván Martín Díez, Technical Project Manager

“We were searching for a way that would allow us to connect existing M-Bus and MODBUS meters to our LoRaWAN network and found the solution provided by ACRIOS valuable for these use cases.“

Martin Brunner, Head of Supply Chain at Netmore

Tell us what you need. We’ll find the best solution together.

Lukáš Smetana
CSO

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