HD67C05-2-G43-E-VPN-B2 Industrial Modbus Slave and MQTT Broker Converter with LTE, eSIM and VPN

HD67C05-2-G43-E-VPN-B2 – Industrial Modbus Slave and MQTT Broker Converter with LAN, LTE, eSIM and VPN.

The HD67C05-2-G43-E-VPN-B2 is an advanced industrial converter that integrates Modbus RTU in Slave mode with a fully featured MQTT Broker and secure VPN communication. With triple connectivity – Ethernet, LTE (SIM) and an embedded eSIM – the device ensures redundant, reliable and encrypted communication for industrial automation, energy systems and IoT infrastructures.

Download configuration software (SW67C05):
Click here to download the SW67C05 software

Designed for harsh environments, the unit operates within a wide temperature range of -40°C to +85°C, offers galvanic isolation between Ethernet and the power section, and supports an input range of 8…24V AC / 12…35V DC. These characteristics make it suitable for demanding industrial applications.

Key Features and Advantages

• Modbus Slave RS485 – maps incoming MQTT data to Modbus registers, supporting Holding/Input Registers and bit-level interpretation.
• Integrated MQTT Broker – client management, topic access control, JSON/RAW payloads, QoS settings, cyclic publishing and MQTT Bridge for external broker communication.
• VPN Service – secure, encrypted tunneling for remote access and protected industrial data transfer.
• LTE + eSIM connectivity – supports Micro-SIM and embedded eSIM with APN and mobile network settings configurable through the device's mobile interface.
• Galvanic isolation between Ethernet and power supply for improved electrical protection.
• SW67C05 software – used for full configuration of Modbus, MQTT, LTE/eSIM and VPN parameters.
• Diagnostic LEDs – indicators for RS485 activity, communication status, network errors and overall device operation.
• DIN rail mounting – compact type-B Modulbox housing for industrial enclosures.

How the Converter Works

As a Modbus Slave, the HD67C05-2-G43-E-VPN-B2 exposes data received from MQTT topics in the form of Modbus registers, allowing traditional PLC, SCADA and BMS systems to utilize information originating from IoT platforms or cloud environments. Data mapping is fully configurable and supports JSON and RAW formats.

The integrated MQTT Broker supports bidirectional communication, topic subscriptions, automatic publishing intervals and interaction with external brokers via MQTT Bridges. The VPN tunnel ensures encrypted communication, crucial for remote energy applications, industrial telemetry and protected infrastructure.

Ports and Connectivity

• 1× RS485 Modbus Slave – 3-pin screw terminal (5 mm).
• 1× Ethernet RJ45 – 10/100 Mbps autosensing.
• LTE SIM + eSIM – redundant mobile connectivity.
• 2-pin power connector – 5 mm pitch.

Technical Specifications

• Modbus Slave: up to 115200 bps
• MQTT Ethernet: 10/100 Base-T autosensing
• LTE SIM/eSIM: Micro-SIM, integrated eSIM, SMA antenna support
• 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: SW67C05
• Order code: HD67C05-2-G43-E-VPN-B2

Applications

• MQTT-based IoT solutions.
• Remote telemetry and industrial monitoring.
• Energy sector, PV farms, utility stations.
• Building automation: HVAC / BMS.
• Secure industrial communication requiring VPN.
• RS485 device integration with cloud platforms.

The HD67C05-2-G43-E-VPN-B2 is a complete, secure and high-performance industrial converter that combines Modbus Slave, MQTT Broker, LTE, eSIM and VPN capabilities in a single device. With advanced configuration options, environmental robustness and reliable communication, it is an excellent choice for remote automation, energy networks and IoT infrastructures requiring secure data exchange.