HD67933-4-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 HD67933-4-B2 is a high-performance industrial gateway that enables direct integration between Modbus Master networks and MQTT-based IoT platforms. It allows users to publish data read from Modbus Slave devices into an MQTT server in real time, creating a bridge between traditional field devices and modern IIoT infrastructures. With TLS/SSL encryption support, it ensures secure and reliable communication, making it suitable for critical industrial environments where data protection is a priority.

Designed for use in manufacturing plants, energy monitoring systems, and building automation, the HD67933-4-B2 supports Modbus speeds up to 115200 bps and features an auto-sensing Ethernet interface for optimal network configuration without manual adjustments. Its compact yet rugged housing type B design allows for easy DIN rail mounting in industrial control panels, ensuring fast installation and minimal downtime during integration. The gateway is compatible with a wide range of MQTT brokers, enabling flexible deployment in both on-premise and cloud-based systems.

The device is easy to configure via the free SW67933 software, which provides a user-friendly interface for setting up MQTT and Modbus parameters, mapping variables, and performing firmware updates. Its operating temperature range of -40°C to +85°C ensures reliable performance in harsh industrial environments, from cold storage facilities to high-temperature production areas. Electrical isolation between Ethernet and Modbus further enhances system stability and protects against electrical disturbances.

Configuration:

Thanks to the SW67933 software on your PC you can:

• Define the parameters of MQTT, including broker address, port, 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 monitoring and analysis
• Define which Modbus variables are written by the MQTT server for remote control of field devices
• Update the device firmware to maintain compatibility with evolving standards

Characteristics:

• Electrical isolation between Ethernet and Modbus for improved reliability
• DIN rail 35mm mounting for quick installation in control cabinets
• Wide power supply input range: 18...35V DC or 8...24V AC for flexibility in industrial setups
• Rugged design suitable for demanding industrial conditions
• Compact dimensions allow integration in space-limited environments

Specifications:

• Ports: 1x Ethernet, 1x RS-485
• Serial port protocol: Modbus Master (RS-485)
• 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: 2-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: HD67933-4-B2

The HD67933-4-B2 is an excellent choice for remote monitoring, energy management, and industrial automation applications that require secure, real-time data exchange. It bridges the gap between Modbus devices and modern IoT platforms, enabling better decision-making through continuous access to operational data. This makes it an essential tool for industries embracing Industry 4.0 and smart manufacturing strategies.

By supporting standard MQTT payload formats, the converter allows straightforward integration with dashboards, analytics platforms, and databases. TLS/SSL encryption safeguards communications end-to-end, ensuring compliance with industrial cybersecurity standards and future-proofing the solution for evolving IIoT requirements.

Configurator – Software SW67933 FREE DOWNLOAD

Manufacturer's warranty: 24 months