Industrial KNX TP to MQTT Broker converter with LTE and VPN for IoT HD67C18-G43-VPN-B2

Industrial KNX TP to MQTT Broker converter with LTE and VPN HD67C18-G43-VPN-B2

HD67C18-G43-VPN-B2 is an industrial communication converter designed to integrate KNX TP building automation systems with modern IoT platforms, BMS solutions and cloud infrastructures using the MQTT Broker communication architecture. The device enables secure and reliable data exchange between the KNX fieldbus and Ethernet as well as cellular LTE networks.

The G43-VPN version combines LAN and LTE connectivity with an integrated VPN service, providing encrypted communication and secure remote access to KNX installations. This makes the converter ideal for applications where data security, remote diagnostics and protected access to building automation systems are critical requirements.

KNX TP communication is handled via a dedicated KNX bus connector with a data rate of 9600 bps, while MQTT communication is performed through RJ45 Ethernet supporting 10/100 Base-T Autosensing and via the LTE cellular network. Galvanic isolation between Ethernet and the power supply enhances system stability and protects connected devices in demanding industrial and building automation environments.

The converter is housed in a compact B2 Modulbox enclosure designed for DIN 35 mm rail mounting. It supports operation in harsh environmental conditions with a wide operating temperature range from -40°C to +85°C. Compact dimensions of 70 × 60 × 95 mm allow installation inside space-constrained control cabinets.

Key features

• Integration of KNX TP systems with MQTT Broker.
• Ethernet and LTE connectivity with integrated VPN service.
• Secure remote access to KNX installations.
• KNX TP communication at 9600 bps.
• Support for 10/100 Base-T Autosensing for MQTT.
• Mapping of KNX group objects to MQTT topics.
• Galvanic isolation between Ethernet and power supply.
• Industrial enclosure for DIN rail mounting.

Device configuration and commissioning are performed using dedicated software SW67C18 , which allows configuration of KNX parameters, MQTT settings, VPN communication and firmware updates.

Technical specifications

• Protocols: KNX TP, MQTT Broker
• Ports: 1× KNX, 1× Ethernet RJ45, SIM
• KNX data rate: 9600 bps
• MQTT data rate: 10/100 Base-T Autosensing
• Power supply: 8…24V AC or 12…35V DC
• Power connector: 2-way 5 mm terminal block
• Operating temperature: -40°C to +85°C
• Dimensions: 70 × 60 × 95 mm (D × W × H)
• Weight: approx. 200 g
• Mounting: DIN rail
• Software: SW67C18
• Order code: HD67C18-G43-VPN-B2

HD67C18-G43-VPN-B2 is a secure and reliable solution for integrating KNX-based building automation systems with MQTT-driven IoT platforms, particularly in applications requiring LTE connectivity and protected remote access via VPN.

Need technical support or assistance with device selection? Contact Consteel Electronics .