HD67931-B2-169MHz-80 Industrial M-Bus Wireless to MQTT Converter for 80 wired and 32 wireless slaves, secure TLS/SSL, 169 MHz, DIN mount

Industrial MBus Wireless to MQTT converter, master MBus up to 80 slaves and up to 32 MBus Wireless slaves, housing type B (wide), DIN rail mount. 

HD67931-B2-169MHz-80 is a powerful industrial gateway designed to integrate up to 80 wired M-Bus slaves and up to 32 wireless M-Bus devices operating in the 169 MHz band into an MQTT infrastructure. It is ideal for smart metering, building automation, and IoT energy management projects where secure, scalable and flexible data transfer is required.

This gateway enables seamless real-time publishing of M-Bus data to any MQTT server, including cloud-based platforms and on-premise IoT systems. Thanks to built-in TLS/SSL encryption, communication remains secure even when transmitted across public networks. The device comes in a DIN rail mountable type B enclosure, optimized for industrial environments.

By bridging traditional M-Bus metering systems (used in water, gas, electricity and heat consumption monitoring) with modern IoT dashboards and BMS systems, the HD67931-B2-169MHz-80 offers system integrators and facility managers a versatile tool to improve monitoring, reporting, and billing accuracy.

HD67931-B2-169MHz-80 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.

Applications:

• Smart metering – data acquisition from wired and wireless M-Bus meters.
• Utility monitoring – water, electricity, gas and heating consumption tracking.
• IoT integration – publish metering data into M2M dashboards and cloud platforms.
• Building automation – integration with BMS and SCADA systems for real-time monitoring.

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

Advanced configuration tips:

• Enable TLS/SSL to protect sensitive consumption data.
• Assign clear MQTT topics for building, floor, or device identifiers.
• Adjust QoS levels to balance network load and reliability.
• Ensure proper antenna placement for stable 169 MHz wireless communication.

Characteristics:

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

Installation and wiring:

• Ethernet port (RJ45) – 10/100 Base-T with auto-sensing.
• M-Bus terminal – 2-way 5 mm terminal block for wired meters.
• Wireless antenna – SMA Female connector optimized for 169 MHz range.
• Power supply – 18–35 VDC, peak consumption up to 30W during start-up.

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)
• Maximum power consumption at converter start-up: 30W
• Weight: 200g approx
• Mechanical fixing: DIN Rail mount
• Software: SW67931
• ORDER CODE: HD67931-B2-169MHz-80

Configurator – Software SW67931 FREE DOWNLOAD

Manufacturer's warranty: 24 months

---