HD67940-B2 Industrial CANopen to MQTT Converter for Secure IoT (DIN Rail)

Industrial CANopen to MQTT converter, TLS/SSL, up to 1 Mbps, Ethernet 10/100 RJ45, housing type B (wide), DIN rail mount, -40°C to +85°C, 8–24 VAC / 12–35 VDC.

The HD67940-B2 gateway is designed to provide reliable and efficient integration between CANopen field devices and modern MQTT servers widely used in IoT and cloud applications. This converter enables seamless publishing and subscribing of process data, making it possible to transfer operational values directly from controllers, sensors, and actuators in CANopen networks into MQTT environments. With this approach, industrial systems gain connectivity with SCADA, cloud dashboards, or enterprise monitoring platforms. The device ensures bidirectional data flow, which means that not only can information be exported from the CANopen fieldbus, but commands and updates can also be sent from the MQTT broker back into the automation layer. The communication is secured through TLS/SSL encryption, ensuring data integrity and confidentiality, which is critical in industrial environments where secure IoT connections are mandatory. Thanks to its compact housing, the converter can be mounted easily on a DIN rail and integrated into control cabinets without increasing installation complexity. With native support for standard MQTT servers, the device is immediately compatible with the majority of IoT platforms. In addition, engineers appreciate that the product is supported by a free configuration software package, SW67940, which greatly simplifies setup and deployment. All these aspects make the HD67940-B2 an essential tool for connecting traditional automation equipment to Industry 4.0 ecosystems.

One of the main advantages of the HD67940-B2 CANopen to MQTT gateway is its ability to support a wide range of industrial applications. It is particularly useful in projects where operators need to connect legacy CANopen devices such as drives, controllers, or distributed I/O modules with new-generation monitoring systems that run on MQTT. The device is suitable for smart factories, building automation, energy management, and even transport systems where CANopen networks are common. With support for data rates up to 1 Mbps on the CANopen side, the converter ensures no bottleneck in communication, even in demanding applications. On the Ethernet side, the gateway supports 10/100 Base-T autosensing, guaranteeing high performance in networked infrastructures. Electrical isolation between CANopen and Ethernet lines provides robust protection against disturbances and voltage differences, which increases the long-term reliability of the installation. The unit operates in a wide temperature range from -40°C to +85°C, which makes it suitable for harsh industrial conditions, outdoor cabinets, and transport systems exposed to vibrations or environmental stress. Thanks to its compact size of 60 x 36 x 95 mm and low weight of approximately 200 grams, it is easy to install even in space-limited enclosures. All these characteristics ensure that integrators can deploy the converter in multiple sectors without compatibility or performance concerns.

Configuration of the HD67940-B2 converter is carried out using the free SW67940 software, which runs on a standard PC. With this tool, users can define the MQTT connection parameters, such as broker address, port, client ID, and authentication credentials. Similarly, it is possible to set all CANopen communication parameters, including baud rate, node ID, and mapping of process data objects (PDOs) to MQTT topics. This ensures that variables from field devices are correctly published to the broker and can be subscribed to by IoT clients. The software also allows the definition of bidirectional mappings, enabling MQTT messages to trigger specific actions on the CANopen side. Firmware updates and diagnostics can also be performed directly through the configuration tool, ensuring that the gateway remains secure and up to date. The product is powered via 8…24 VAC or 12…35 VDC input ranges, giving flexibility for integration into different industrial panels. A 2-way 5 mm terminal block provides a secure power supply connection, while the CAN interface is accessible via a 3-way 5 mm terminal block. With simple DIN rail mounting, the device can be quickly integrated into existing cabinets without additional mechanical work. By combining flexible configuration, secure communication, and robust hardware, the HD67940-B2 is a complete solution for bridging CANopen automation systems with modern MQTT infrastructures.

Specifications:

• Ports: 1x Ethernet, 1x CAN
• Ethernet protocol: MQTT
• CAN protocol: CANopen
• Data Rates CAN: Up to 1Mbps
• Data Rates MQTT: 10/100 Base-T with autosensing
• CAN connector: 3-way 5mm terminal block
• MQTT connector: RJ45
• Power supply: 8...24VAC 12...35VDC
• Power supply connector: 2-way 5mm terminal block
• Operating temperature: -40°C/+85°C (-40°F/+185°F)
• Dimensions: 60 mm x 36 mm x 95 mm (DxWxH)
• Weight: 200g approx
• Mechanical fixing: DIN Rail mount
• Software: SW67940
• ORDER CODE: HD67940-B2

Configurator – Software SW67940 FREE DOWNLOAD

Manufacturer's warranty: 24 months

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