HD67931-B2-433MHz-80 Industrial M-Bus Wireless to MQTT Converter for 80 wired and 32 wireless slaves, 433 MHz, TLS/SSL, DIN rail 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. 

The HD67931-B2-433MHz-80 is a professional industrial gateway that enables seamless integration of traditional M-Bus wired meters (up to 80 devices) and M-Bus wireless meters (up to 32 devices at 433 MHz) into modern IoT infrastructures. It acts as a powerful communication bridge, publishing data into MQTT servers used in energy management, smart metering, and building automation.

This converter supports TLS/SSL encryption, ensuring a secure data exchange between meters and remote cloud or SCADA systems. Its rugged housing with DIN rail mounting makes it ideal for industrial installations in harsh environments such as energy utilities, district heating networks, water distribution, and smart city projects.

The unit is compatible with a wide range of popular meter brands including SIEMENS, Kamstrup, Maddalena, and Sontex. Configuration is intuitive and performed with the free SW67931 software, allowing system integrators to quickly set up the device without complex coding.

HD67931-B2-433MHz-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 – reliable reading and transmission of data from water, gas, heat and electricity meters.
• IoT integration – direct publishing of data into cloud servers and M2M applications.
• Building automation – integration with BMS and SCADA systems for remote monitoring.
• Utility networks – enabling central management of distributed metering points.

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

Integration tips:

• Organize MQTT topics based on hierarchy such as building/floor/meter.
• Enable TLS/SSL for secure communication with cloud services.
• Adjust QoS levels to ensure reliability of transmitted measurement data.
• Place the antenna properly to optimize 433 MHz wireless signal reception.

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
• 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-B2-433MHz-80

Configurator – Software SW67931 FREE DOWNLOAD

Manufacturer's warranty: 24 months

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