HD67931-B2-169MHz-250 Industrial M-Bus Wireless to MQTT gateway for 250 wired and 32 wireless meters

HD67931-B2-169MHz-250 – Industrial MBus Wireless to MQTT converter, master M-Bus up to 250 slaves and up to 32 wireless slaves, housing type B (wide), DIN rail mount.

The HD67931-B2-169MHz-250 is an advanced gateway that bridges M-Bus wired and wireless networks with MQTT-based IoT platforms. It supports up to 250 wired M-Bus devices and 32 wireless meters operating at 169 MHz, making it highly suitable for large-scale deployments in energy distribution, district heating, water utilities, and smart city infrastructures. By publishing metering data directly to MQTT servers, the device simplifies integration with SCADA, cloud platforms, and building automation systems. With TLS/SSL encryption, secure communication is guaranteed, preventing unauthorized access and ensuring data integrity. Its DIN rail housing type B provides robust mounting options for industrial cabinets, while compact dimensions facilitate installation even in constrained spaces. This combination of wired and wireless support reduces costs and complexity by unifying diverse networks into one reliable communication channel.

The converter is fully compatible with widely used MBus meters from Siemens, Kamstrup, Maddalena, Sontex and many others. Data collected from these meters can be transmitted in real time to MQTT brokers, enabling monitoring, visualization, and integration with higher-level applications. Using the free SW67931 configuration tool, installers can easily set parameters for MQTT connectivity, wired M-Bus lines, and wireless M-Bus links. The device offers electrical isolation between Ethernet and M-Bus to enhance system protection and long-term reliability. With a wide input voltage range of 18–35 VDC and RJ45 Ethernet port, SMA antenna connector for wireless, and screw terminal blocks for M-Bus and power supply, integration is straightforward and installation time is minimized. This flexibility makes it a preferred solution for integrators and OEMs seeking reliable connectivity in IoT, energy monitoring, and industrial automation.

Designed for harsh industrial environments, the gateway operates in a wide temperature range from -40°C to +85°C. Its compact housing of 71 x 60 x 95 mm and weight of approximately 200 g make it easy to mount on standard DIN 35 mm rails. The device ensures stable operation during startup with a maximum inrush power consumption of 30 W. Thanks to support for 10/100 Base-T auto-sensing Ethernet and up to 38400 bit/s M-Bus data rate, it can handle demanding communication loads. Firmware updates are managed through the SW67931 tool, keeping the device aligned with evolving standards and MQTT features. The manufacturer provides a 24-month warranty, confirming long-term reliability for mission-critical systems. This gateway is the right choice for projects requiring secure, scalable, and efficient data acquisition from diverse M-Bus infrastructures into modern IoT and cloud ecosystems.

HD67931-B2-169MHz-250 allows to publish the data read from MBus meters into a MQTT Server. These gateways allow a fast and easy access to the IoT world and they are compatible with IoT Servers that support MQTT protocol. The MQTT communication can be encrypted using TLS / SSL protocols, ensuring a secure communication.

They allow to monitor MBus meters (like SIEMENS, Kamstrup, Maddalena, Sontex, etc.). Converter is easy to configure thanks to free SW67931 software.

Configuration:

Thanks to the SW67931 software on your PC you can:

• Define the parameters of MQTT line
• Define the parameters of MBus line
• Define the parameters of MBus Wireless line
• Define which MBus variables are sent to MQTT Server
• Update the device

Characteristics:

• Electrical isolation between Ethernet and MBus
• Mountable on 35mm Rail DIN
• Wide power supply input range: 18...35V DC

Specifications:

• Ports: 1x Ethernet, 1x MBus Wireless; 1x MBus
• Ethernet protocol: MQTT
• MBus Wireless protocol: MBus Wireless, N1&N2 communication
• MBus protocol: MBus Master
• MQTT connector: RJ45
• MBus Wireless connector: SMA Female Antenna
• MBus connector: 2way 5mm terminal block
• MBus Wireless frequency: 169 MHz
• Data Rates MQTT: 10/100 Base-T with autosensing
• Data Rates MBus: Up to 38400 bit/s
• Power supply: 18...35V DC
• Maximum power consumption at converter start-up: 30W
• Power supply connector: 2way 5mm terminal block
• Operating temperature: -40°C/+85°C (-40°F/+185°F)
• Dimensions: 71 mm x 60 mm x 95 mm (DxWxH)
• Weight: 200g approx
• Mechanical fixing: DIN Rail mount
• Software: SW67931
• ORDER CODE: HD67931-B2-169MHz-250

Configurator – Software SW67931 FREE DOWNLOAD

Manufacturer's warranty: 24 months

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