HD67931-B2-20 Industrial M-Bus to MQTT Gateway for up to 20 Slaves

Industrial MBus to MQTT converter, master MBus up to 20 slaves, housing type B (wide), DIN rail mount. 

The HD67931-B2-20 is a professional-grade industrial gateway that enables seamless M-Bus to MQTT integration. Designed for compatibility with up to 20 M-Bus slave devices, it is ideal for connecting energy meters, water meters, heat meters, and other industrial M-Bus devices to modern IoT platforms. It supports both uplink (publishing data) and downlink (receiving commands) communication flows, ensuring complete bidirectional integration between field devices and MQTT-based systems.

Thanks to its built-in TLS/SSL encryption, the HD67931-B2-20 guarantees secure data transmission, protecting critical infrastructure from unauthorized access. It is fully compatible with public and private IoT servers that support the MQTT protocol, making it highly versatile for a wide range of smart building, energy monitoring, and industrial automation applications. Typical use cases include integrating SIEMENS, Kamstrup, Maddalena, and Sontex meters into cloud platforms for real-time data analysis.

With a robust type B housing and DIN rail mounting, installation in industrial cabinets is quick and secure. The device offers a wide power supply range of 18…35V DC and 15…21V AC, making it adaptable to various control panel power systems. Its extended operating temperature range from -40°C to +70°C ensures reliable operation in demanding environments such as industrial plants, outdoor enclosures, or energy substations.

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 (server address, port, QoS level, authentication).
• Define the parameters of MBus line (baud rate, parity, stop bits, polling intervals).
• Define the parameters of MBus Wireless line, enabling remote data acquisition.
• Define which MBus variables are sent to MQTT Server for cloud storage and analytics.
• Update the device firmware to enable new features or security improvements.

Characteristics:

• Electrical isolation between Ethernet and MBus for protection against surges and ground loops.
• Mountable on 35mm DIN rail for easy integration into industrial cabinets.
• Wide power supply input range: 18…35V DC and 15…21V AC.

Specifications:

• Ports: 1x Ethernet, 1x MBus
• Ethernet protocol: MQTT
• Ethernet connector: RJ45
• MBus protocol: MBus master
• MBus connector: 2-way 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: 2-way 5mm terminal block
• Operating temperature: -40°C to +70°C (-40°F to +185°F)
• Dimensions: 71 x 60 x 95 mm (DxWxH)
• Weight: approx. 200g
• Mechanical fixing: DIN rail mount
• Software: SW67931
• Order code: HD67931-B2-20

Configurator – Software SW67931 FREE DOWNLOAD

Manufacturer's warranty: 24 months

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