HD67C04-5-G43-B2 Modbus Master and MQTT Broker with LAN and LTE – Industrial Communication Converter

HD67C04-5-G43-B2 Modbus Master and MQTT Broker – Industrial Converter with LAN and LTE.

The HD67C04-5-G43-B2 is an advanced industrial communication converter that integrates Modbus RTU networks with modern MQTT-based automation, IoT and remote monitoring systems. The device operates as a Modbus Master and an embedded MQTT Broker, providing a highly efficient method for acquiring RS485 data and distributing it to SCADA platforms, cloud systems and industrial dashboards.

Download software (SW67C04):
Click here to download the configuration software

The G43 version includes an integrated LTE SIM module, enabling reliable mobile communication in locations without cable infrastructure or where redundant connectivity is required. The durable type B housing, DIN rail mounting and wide operating temperature range from -40°C to +85°C ensure stable operation in industrial and outdoor environments.

Key Features and Advantages

• Modbus Master (RS485) for managing and polling a wide range of Modbus RTU devices.
• Built-in MQTT Broker for local publish/subscribe communication without external servers.
• LAN + LTE SIM connectivity for redundant and reliable industrial data transfer.
• Full data mapping with configurable MQTT topics, JSON formatting, QoS and update intervals.
• Galvanic isolation between Ethernet and the power supply for enhanced system protection.
• Wide operating temperature range from -40°C to +85°C for demanding environments.
• Flexible AC/DC power supply from 8…24 V AC or 12…35 V DC.

How the HD67C04-5-G43-B2 Works

The converter operates as a Modbus Master, continuously reading data from devices connected via RS485 such as meters, PLCs, HVAC units, industrial sensors and process controllers. The acquired data is then published through the integrated MQTT Broker, enabling real-time distribution to cloud services, IoT platforms and SCADA applications. It also supports bidirectional communication, allowing MQTT messages to write values back into Modbus registers.

The addition of LTE SIM connectivity ensures complete independence from wired LAN networks, making the device ideal for remote monitoring, energy substations, photovoltaic installations, containerized systems or mobile applications.

Ports and Connectivity

• 1× RS485 Modbus Master – 3-way screw terminal, 5 mm pitch.
• 1× Ethernet RJ45 – 10/100 Base-T autosensing.
• LTE SIM slot – mobile data communication.
• Power input – 2-way screw terminal, 5 mm pitch.

Technical Specifications

• Modbus Master speed: up to 115200 bps
• MQTT Ethernet: 10/100 Base-T autosensing
• Power supply: 8…24 V AC or 12…35 V DC
• Operating temperature: -40°C to +85°C
• Dimensions: 70 × 60 × 95 mm
• Weight: approx. 200 g
• Mounting: DIN rail 35 mm
• Software: SW67C04
• Order code: HD67C04-5-G43-B2

Applications

• Modbus RTU integration with IoT and cloud systems.
• Remote monitoring via LTE connectivity.
• Energy monitoring, HVAC and industrial automation.
• SCADA and BMS systems requiring MQTT data exchange.
• Distributed infrastructure and field installations.

Technical Support and Deployment

Consteel Electronics provides complete support for Modbus polling setup, MQTT topic configuration, LTE SIM configuration and integration into automation systems. We can prepare a ready-to-deploy configuration tailored to your application.