HD67C04-2-G43-E-B2 Modbus Master and MQTT Broker Converter with LAN, LTE SIM and eSIM

HD67C04-2-G43-E-B2 Modbus Master and MQTT Broker Converter with LAN, LTE SIM and eSIM.

The HD67C04-2-G43-E-B2 is a high-performance industrial protocol converter designed for applications that require reliable integration between Modbus Master devices and modern MQTT Broker platforms. This model stands out thanks to its dual mobile connectivity system, offering both a physical LTE SIM slot and an integrated eSIM module, making it ideal for remote installations, distributed IoT systems and applications where fail-safe communication is essential.

With its combination of Ethernet LAN, LTE SIM and eSIM, the device ensures strong communication redundancy and uninterrupted access to field data. It is designed for industrial environments that require stability, long-term operation and advanced data publishing capabilities. The converter supports all MQTT data structures used in IoT ecosystems, enabling fast integration with cloud services, remote dashboards and automation software.

Key Features of the HD67C04-2-G43-E-B2

• Modbus Master interface for controlling and reading Modbus field devices.
• MQTT Broker functionality enabling publishing and subscribing of industrial data.
• Three communication paths: Ethernet LAN, LTE SIM card slot and built-in eSIM.
• Support for MQTT 3.1, 3.1.1 and 5.0 with configurable topic structures and data mapping.
• Advanced mobile configuration including APN settings, authentication parameters and signal diagnostics.
• Modbus Master speed up to 115200 bps, suitable for large automation networks.
• Industrial-grade housing type B with terminal block connectors.
• Wide operating temperature range from -40°C to +85°C, suitable for harsh conditions.
• Compact design with DIN Rail mount for easy integration into control cabinets.
• Software configuration performed using ADFweb Compositor SW67C04.

How the Converter Works

The device operates as a Modbus Master, collecting data from RS232 Modbus nodes such as meters, sensors, controllers or automation modules. These values are organized, processed and distributed using the integrated MQTT Broker, which provides a flexible and scalable method for delivering industrial data into cloud applications, remote monitoring tools or SCADA systems supporting MQTT communication.

A complete topic management engine allows defining names, structures, update frequencies, data types, quality of service levels and JSON formats. The device also supports bidirectional data exchange, enabling MQTT subscribers to write values back into Modbus devices. This makes the HD67C04-2-G43-E-B2 a central communication hub for any mixed automation and IoT environment.

Ports and Connectivity

• 1 Modbus Master port on a 3-way 5 mm terminal block.
• 1 Ethernet port RJ45 supporting 10/100 Base-T autosensing.
• LTE SIM slot for physical SIM cards.
• Integrated eSIM module for secure and embedded mobile connectivity.
• Power input on a 2-way terminal block, 8 to 24 V AC or 12 to 35 V DC.

Technical Specifications

• Modbus Master speed: up to 115200 bps
• MQTT communication: 10/100 Base-T autosensing
• Dimensions: 70 x 60 x 95 mm
• Weight: approximately 200 g
• Power supply: 8 to 24 V AC or 12 to 35 V DC
• Operating temperature: -40°C to +85°C
• Mechanical fixing: DIN Rail mount
• Software: SW67C04
• Order code: HD67C04-2-G43-E-B2

Software Download (SW67C04)

The official configuration software SW67C04 for Modbus, MQTT, Ethernet and mobile settings can be downloaded here:

Download SW67C04 Software

Applications

• Industrial Modbus to MQTT data integration
• Remote installations requiring LTE SIM or eSIM connectivity
• Cloud data acquisition for maintenance and analytics
• IoT-based energy management and building automation
• SCADA and automation systems that require MQTT Broker functions
• Environmental, utility and infrastructure monitoring

Support and Expert Assistance

Consteel Electronics provides full assistance with configuration, topic management, Modbus polling setup and LTE or eSIM communication settings. Our engineers can prepare a ready-to-use configuration tailored to your industrial application.