HD67931-B2-40 Industrial M-Bus to MQTT converter for up to 40 devices

HD67931-B2-40 – Industrial M-Bus to MQTT converter, master M-Bus up to 40 slaves, housing type B (wide), DIN rail mount.

HD67931-B2-40 is a professional industrial gateway designed for the integration of M-Bus meters into MQTT-based IoT platforms. Supporting up to 40 M-Bus slave devices, this converter is a reliable solution for smart buildings, energy management, and utility infrastructures. It enables the collection of consumption data from heating, water, and gas meters, making them available in real time to MQTT servers.

The device ensures secure communication by supporting TLS/SSL encryption, protecting sensitive data from unauthorized access. Its compatibility with multiple IoT servers and cloud platforms allows seamless integration into existing BMS and SCADA systems. By using the free SW67931 software, system integrators can quickly configure all necessary parameters, reducing deployment time and simplifying maintenance.

With a wide operating temperature range of -40°C to +70°C and a rugged DIN rail mount housing, HD67931-B2-40 is engineered for demanding industrial environments. The electrical isolation between Ethernet and M-Bus lines guarantees system stability and prevents interference. Its compact design (71 x 60 x 95 mm) and low weight (~200 g) make installation straightforward, even in space-constrained control cabinets. The converter can be powered either by 18…35V DC or 15…21V AC, providing flexibility in integration.

HD67931-B2 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 or 15...21V AC

Specifications:

• Ports: 1x Ethernet, 1x MBus
• Ethernet protocol: MQTT
• Ethernet connector: RJ45
• MBus protocol: MBus master
• MBus connector: 2way 5mm fixed screw terminal
• Data Rates MBus: Up to 38400 bps
• Data Rates MQTT: 10/100 Base-T with autosensing
• Power supply: 15...21V AC; 18...35V DC
• Power supply connector: 2way 5mm terminal block
• Operating temperature: -40°C/+70°C (-40°F/+185°F)
• Dimensions: 71 mm x 60 mm x 95 mm (DxWxH)
• Weight: 200g approx
• Maximum power consumption at converter start-up: 30W
• Mechanical fixing: DIN Rail mount
• Software: SW67931
• ORDER CODE: HD67931-B2-40

Configurator – Software SW67931 FREE DOWNLOAD

Manufacturer's warranty: 24 months

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