HD67812-KNX-232-B2 Industrial Modbus RS232 Master to KNX TP Converter DIN Housing B

Industrial Modbus RS232 master to KNX TP converter, housing type B (wide), DIN rail mount.

HD67812 allows to communicate KNX TP with RS232 Modbus RTU devices like SCADA, HMI or Modbus controllers. This version with RS232 Master interface is particularly useful in projects where KNX building automation systems need to be integrated with industrial controllers or supervisory platforms based on Modbus serial communication. The robust housing type B makes the device mechanically stronger and easier to wire inside industrial cabinets. Converter is easy to use thanks to free SW67812 software, which provides user-friendly configuration and quick device setup.

Configuration:

Thanks to the SW67812 software on your PC you can:

• Define the parameters of Modbus line
• Define the parameters of KNX line
• Define the KNX messages that the Converter can accept
• Define the KNX frames that the Converter sends through the KNX line
• Define the map of KNX byte that must be written in the Modbus side
• Define the map of which Modbus registers must be written in KNX messages
• Update the device

The configuration tool provides intuitive mapping between KNX datapoints and Modbus registers, enabling seamless data flow in both directions. This flexibility is especially important in complex building and industrial integration projects, where devices from different vendors must communicate reliably.

Characteristics:

• Up to 1440 bytes in reading and 1440 bytes in writing
• Triple isolation between KNX - Power Supply, KNX – Serial, Power Supply - Serial
• Bi-directional information exchange between KNX bus and Modbus bus
• Mountable on 35mm Rail DIN

The high memory allocation of 1440 bytes in both read and write directions allows the converter to handle a large number of data points, making it suitable for medium to large projects. The triple isolation system provides increased safety and reliability by separating communication lines and power supply, reducing the risk of interference or damage.

Specifications:

• Ports: 1x KNX; 1x RS-232
• KNX protocol: KNX TP
• Modbus protocol: Modbus RS-232 Master
• Data Rates KNX: 9600 bit/s
• Data Rates Modbus: Up to 115200 bit/s
• KNX connector: KNX Bus connector
• Modbus connector: 3way 5mm terminal block
• Power supply: 8...24VAC; 12...35VDC
• Power supply connector: 2way 5mm terminal block
• Operating temperature: -40°C to +85°C (-40°F to +185°F)
• Dimensions: 71 mm x 60 mm x 95 mm (DxWxH)
• Weight: 200g approx
• Mechanical fixing: 35mm DIN Rail mount
• Software: SW67812
• ORDER CODE: HD67812-KNX-232-B2

With operating temperatures from -40°C to +85°C, the converter can be deployed in both indoor control cabinets and outdoor enclosures, guaranteeing stable performance in extreme conditions. Its compact DIN rail housing simplifies integration into existing installations.

Configurator – Software SW67812 FREE DOWNLOAD

The HD67812-KNX-232-B2 is widely used in building automation, HVAC integration, lighting control, energy monitoring and industrial SCADA systems. It enables engineers to link legacy Modbus RS232 devices with modern KNX TP networks, allowing bidirectional data sharing between building management and industrial infrastructures.

System integrators appreciate the converter for its user-friendly software, reliability, compact DIN rail design and ability to operate 24/7. By bridging Modbus and KNX, the device ensures full interoperability in projects where both protocols coexist.

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