HD67931-B2-868MHz-20 M-Bus Wireless to MQTT Gateway with 20 Slaves Support

HD67931-B2-868MHz-20 – Industrial MBus Wireless to MQTT converter, master MBus up to 20 slaves, housing type B (wide), DIN rail mount. 

The HD67931-B2-868MHz-20 is a professional industrial gateway that enables seamless communication between MBus Wireless meters and an MQTT Server. This converter supports up to 20 M-Bus slaves and operates at a frequency of 868 MHz, ensuring stable transmission in industrial and commercial environments. Designed in a robust housing type B and optimized for DIN rail mounting, it provides easy installation in control cabinets and technical rooms.

This gateway allows data collected from M-Bus devices to be published directly into MQTT servers, which are widely used in IoT infrastructures and cloud platforms. Thanks to its support for TLS/SSL encryption, all MQTT communications remain secure, preventing unauthorized access or data interception. This makes the device highly suitable for critical applications such as energy monitoring, smart building automation, or industrial process control.

The HD67931-B2-868MHz-20 is compatible with a wide range of M-Bus meters, including manufacturers like SIEMENS, Kamstrup, Maddalena, and Sontex. By integrating such meters into MQTT-based systems, operators can achieve real-time monitoring, centralized data collection, and efficient remote management. The included SW67931 software makes configuration quick and intuitive, even for technicians without extensive programming skills.

Configuration:

Thanks to the SW67931 software installed on your PC, you can:

• Define the parameters of the MQTT line, including security options (TLS/SSL)
• Define the parameters of the M-Bus line for wired meters
• Configure the M-Bus Wireless line and manage up to 20 devices
• Select which M-Bus variables are sent to the MQTT Server for monitoring
• Update the device firmware easily, ensuring compatibility with evolving protocols

Characteristics:

• Electrical isolation between Ethernet and M-Bus ensures reliability and protection
• Compact, industrial-grade design, DIN Rail mountable (35mm)
• Wide power supply input range: 18...35V DC
• Operating temperature range: -40°C to +85°C, suitable for harsh environments
• Low weight (200g approx) and optimized dimensions for easy installation

Specifications:

• Ports: 1x Ethernet, 1x M-Bus Wireless, 1x M-Bus
• Ethernet protocol: MQTT
• M-Bus Wireless protocol: M-Bus Wireless S1 & T1 communication
• M-Bus protocol: M-Bus Master
• MQTT connector: RJ45
• M-Bus Wireless connector: SMA Female Antenna
• M-Bus connector: 2-way 5mm terminal block
• Wireless frequency: 868 MHz
• Data rates MQTT: 10/100 Base-T autosensing
• Data rates M-Bus: up to 38400 bit/s
• Power supply: 18...35V DC
• Power supply connector: 2-way 5mm terminal block
• Dimensions: 71 x 60 x 95 mm (DxWxH)
• Weight: 200 g approx
• Maximum power consumption at start-up: 30W
• Mechanical fixing: DIN Rail mount
• Software: SW67931
• ORDER CODE: HD67931-B2-868MHz-20

Configurator – Software SW67931 FREE DOWNLOAD

Manufacturer's warranty: 24 months