HD67931-B2-433MHz-250 Industrial M-Bus Wireless to MQTT converter for 250 meters

HD67931-B2-433MHz-250 – Industrial M-Bus Wireless to MQTT converter, master M-Bus up to 250 slaves and up to 32 M-Bus wireless slaves, housing type B (wide), DIN rail mount.

The HD67931-B2-433MHz-250 is a professional gateway designed to integrate wired and wireless M-Bus networks into IoT platforms using the MQTT protocol. It can manage up to 250 wired M-Bus slaves and up to 32 wireless M-Bus slaves operating in the 433 MHz frequency band. This makes the device highly suitable for applications in utilities, energy monitoring, water distribution and smart city infrastructures, where large amounts of metering data must be collected and transmitted securely. The support of TLS/SSL encryption ensures secure data communication, protecting sensitive metering information against unauthorized access. Its wide housing (type B) and DIN rail mount design simplify integration into industrial control cabinets and harsh environments.

The converter allows monitoring of a wide range of MBus meters, including well-known brands such as SIEMENS, Kamstrup, Maddalena, and Sontex. Data collected from these meters can be seamlessly published to MQTT brokers, enabling real-time integration with SCADA systems, BMS platforms, cloud-based dashboards, and big data analytics environments. Thanks to the free SW67931 software, configuration is quick and intuitive – users can define the communication parameters of MQTT, wired M-Bus, and wireless M-Bus, and select which variables should be published to the MQTT server. The gateway includes electrical isolation between Ethernet and M-Bus, providing enhanced safety and reliability across the entire installation.

The HD67931-B2-433MHz-250 is engineered to operate under demanding industrial conditions. It supports an extended operating temperature range from -40°C to +85°C, ensuring reliable operation even in harsh outdoor or factory environments. With compact dimensions of 71 x 60 x 95 mm and a weight of approximately 200 g, the device is easy to install in tight spaces. Power requirements are flexible, with a wide input range of 18...35 V DC and a maximum inrush consumption of 30 W at start-up. Network performance is guaranteed by Ethernet 10/100 Base-T with auto-sensing capabilities and M-Bus communication rates up to 38400 bit/s. Backed by a 24-month manufacturer’s warranty, this gateway offers long-term reliability and ensures smooth IoT integration of M-Bus systems in industrial and smart city projects.

HD67931-B2-433MHz-250 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

Specifications:

• Ports: 1x Ethernet, 1x MBus Wireless; 1x MBus
• Ethernet protocol: MQTT
• MBus Wireless protocol: MBus Wireless, S1&T1 communication
• MBus protocol: MBus Master
• MQTT connector: RJ45
• MBus Wireless connector: SMA Female Antenna
• MBus connector: 2way 5mm terminal block
• MBus Wireless frequency: 433 MHz
• Data Rates MQTT: 10/100 Base-T with autosensing
• Data Rates MBus: Up to 38400 bit/s
• Power supply: 18...35V DC
• Maximum power consumption at converter start-up: 30W
• 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
• Mechanical fixing: DIN Rail mount
• Software: SW67931
• ORDER CODE: HD67931-B2-433MHz-250

Configurator – Software SW67931 FREE DOWNLOAD

Manufacturer's warranty: 24 months

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