HD67931-B2-169MHz-20 Wireless & Wired M-Bus to MQTT Gateway, 20 Devices

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

HD67931-B2-169MHz-20 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. This industrial-grade gateway supports up to 20 M-Bus slave devices through both wired M-Bus Master and Wireless M-Bus interfaces at 169 MHz. The dual-interface design provides flexibility for integrating existing wired metering infrastructure with modern wireless systems, reducing deployment costs. It features a wide operating temperature range of -40°C to +85°C and power supply range of 18…35 V DC, enabling operation in harsh environments. The type B wide housing and DIN rail mount make installation simple and compatible with standard industrial enclosures. Galvanic isolation between Ethernet and M-Bus ensures high reliability and protection from electrical interference.

They allow to monitor MBus meters (like SIEMENS, Kamstrup, Maddalena, Sontex, etc.). Converter is easy to configure thanks to free SW67931 software. Thanks to the combination of Wireless M-Bus and Wired M-Bus Master ports, the device can collect data from various meter types and forward them securely to MQTT servers. Configuration via the SW67931 tool enables precise setup of communication parameters, variable mapping, and encryption settings. The SMA female connector supports external antennas for improved wireless range, while the 2-way 5mm terminal block ensures secure wired M-Bus connections. This flexibility makes it ideal for smart metering projects where both legacy wired meters and modern wireless devices must coexist. It also suits applications in district heating, water distribution, and energy monitoring networks.

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
• 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
• Maximum power consumption at converter start-up: 30W
• Mechanical fixing: DIN Rail mount
• Software: SW67931
• ORDER CODE: HD67931-B2-169MHz-20

Configurator – Software SW67931 FREE DOWNLOAD

Manufacturer's warranty: 24 months

Need technical advice? Contact our expert

---