HD67933-B2 Industrial Modbus Master to MQTT Converter with TLS/SSL Encryption

Industrial Modbus master to MQTT converter, housing type B (wide), DIN rail mount.

The HD67933-B2 is a high-performance industrial gateway designed to connect Modbus Master networks to MQTT-based IoT platforms. It enables real-time publishing of data read from Modbus Slave devices into MQTT servers, providing a direct bridge between traditional automation systems and the modern Industrial Internet of Things (IIoT). This allows process data to be made available for advanced analytics, remote monitoring, and predictive maintenance. Its TLS/SSL encryption capability ensures secure data transmission, protecting sensitive industrial information from unauthorized access.

This converter is compatible with a wide range of IoT servers and MQTT brokers, making it a flexible solution for diverse applications such as smart factories, energy management, and infrastructure monitoring. Supporting Modbus speeds up to 115200 bps and featuring an auto-sensing Ethernet interface, the HD67933-B2 ensures optimal communication performance while simplifying installation. It is particularly useful for modernizing existing Modbus-based systems by adding secure, cloud-ready data exchange capabilities without altering existing PLC or SCADA configurations.

The device is housed in a robust type B enclosure designed for DIN rail mounting, ensuring easy integration into industrial control panels. It operates reliably in a wide temperature range from -40°C to +85°C, making it suitable for both indoor and outdoor environments, including harsh industrial conditions. Configuration is quick and straightforward using the free SW67933 software, which provides an intuitive interface for setting up MQTT and Modbus communication parameters, mapping variables, and performing firmware updates.

Configuration:

Thanks to the SW67933 software on your PC you can:

• Define the parameters of MQTT, including broker address, port, security credentials, and topic structure
• Define the parameters of the Modbus line, such as baud rate, parity, stop bits, and communication mode
• Define which Modbus variables are sent to the MQTT server for real-time data publishing
• Define which Modbus variables are written by the MQTT server to control field devices remotely
• Update the device firmware to ensure compatibility with evolving industrial protocols and standards

Characteristics:

• Electrical isolation between Ethernet and Modbus for enhanced reliability and safety
• Mountable on standard 35mm DIN rail for quick installation in industrial enclosures
• Wide power supply input range: 18...35V DC and 8...24V AC for flexibility in different installations
• Compact dimensions for easy integration into existing control cabinets
• Rugged industrial-grade components for long-term durability in demanding environments

Specifications:

• Ports: 1x Ethernet, 1x RS-232
• Serial port protocol: Modbus Master (RS-232)
• Ethernet protocol: MQTT
• Ethernet connector: RJ45
• Modbus connector: 2-way 5mm terminal block
• Data rates Modbus: up to 115200 bps
• Data rates MQTT: 10/100 Base-T with autosensing
• Power supply: 8…24VAC / 12…35VDC
• Power supply connector: 3-way 5mm terminal block
• Operating temperature: -40°C to +85°C (-40°F to +185°F)
• Dimensions: 60 mm x 36 mm x 95 mm (DxWxH)
• Weight: approx. 200g
• Mechanical fixing: DIN rail mount
• Software: SW67933
• Order code: HD67933-B2

The HD67933-B2 is ideally suited for industries requiring secure, real-time integration of Modbus devices with IoT systems, such as manufacturing, utilities, building automation, and energy distribution. Its electrical isolation feature ensures stable communication even in environments with high electromagnetic interference. This makes it a dependable choice for mission-critical operations where communication reliability and security are paramount.

By supporting standard MQTT payload formats, the converter integrates effortlessly with dashboards, databases, and cloud services for advanced data processing. The inclusion of TLS/SSL encryption keeps data secure from end to end, making the HD67933-B2 fully aligned with the requirements of Industry 4.0 and modern cybersecurity standards.

Configurator – Software SW67933 FREE DOWNLOAD

Manufacturer's warranty: 24 months