HD67C07-G43-VPN-B2 – Industrial Modbus TCP Slave to MQTT Broker Converter with LTE and VPN

HD67C07-G43-VPN-B2 – Modbus TCP Slave / MQTT Broker with LTE Connectivity and VPN Service

The HD67C07-G43-VPN-B2 is a high-performance industrial converter that combines Modbus TCP Slave functionality with an integrated MQTT Broker, enriched with secure VPN communication and LTE connectivity. Designed for modern automation, IoT and cloud-based monitoring systems, the device ensures encrypted, reliable and scalable data exchange between field installations and supervisory platforms. Its robust housing, DIN Rail mounting and wide operating temperature range (−40°C to +85°C) make it an ideal choice for harsh industrial environments.

The converter allows seamless integration of Modbus TCP networks with MQTT-based architectures, enabling secure remote data access, structured data publishing and safe channel tunneling via VPN. All parameters related to Modbus TCP, MQTT, networking, LTE and security are configured through the intuitive SW67C07 software tool.

Key Features of the HD67C07-G43-VPN-B2

• Modbus TCP Slave functionality with flexible register mapping.
• Full MQTT Broker supporting topic management, QoS levels, JSON formats and client access control.
• Integrated VPN service providing encrypted and secure end-to-end communication.
• LTE communication through Micro-SIM with configurable APN and authentication parameters.
• Ethernet LAN port (RJ45) for configuration, data exchange and firmware updates.
• Electrical isolation between Ethernet and power supply.
• LED indicators for device status, MQTT activity, Modbus activity and error diagnostics.
• Wide industrial temperature range from −40°C to +85°C.
• Power supply: 8–24 V AC or 12–35 V DC.
• DIN Rail mounting for seamless integration into control cabinets.

How the Converter Works

The device operates as a Modbus TCP Slave, serving automation controllers and SCADA systems with data stored in its internal register map. At the same time, the integrated MQTT Broker manages publishing, subscribing, topic structures and JSON payload formatting. With a built-in VPN service, all communication can be tunnelled securely, enabling safe access from external networks and protection against unauthorized interception. When combined with LTE connectivity, the converter becomes a perfect solution for distributed, remote or unmanned installations.

Ports and Connectivity

• 1× Ethernet RJ45 supporting 10/100 Base-T Autosensing.
• LTE SIM slot (Micro-SIM) with SMA Female antenna connector.
• Power input: 2-pin terminal block (8–24 V AC / 12–35 V DC).
• LEDs indicating device status, Modbus communication, MQTT broker activity and alarms.

Technical Specifications

• Modbus TCP Slave: 10/100 Base-T Autosensing
• MQTT Broker: 10/100 Base-T Autosensing
• Operating temperature: −40°C to +85°C
• Dimensions: 70 × 60 × 95 mm
• Weight: approx. 200 g
• Software: SW67C07
• Order code: HD67C07-G43-VPN-B2

Configuration Software

To configure the device, download the dedicated software:
Download SW67C07 Software

The HD67C07-G43-VPN-B2 is a secure, reliable and versatile solution for connecting Modbus TCP devices to MQTT ecosystems. It is ideal for SCADA, BMS, industrial IoT, energy management, environmental monitoring and all remote or distributed automation installations requiring VPN protection and LTE connectivity.