HD67812-KNX-485-B2 Industrial Modbus RS485 Master to KNX TP Converter DIN Housing B

Industrial Modbus RS485 master to KNX TP converter, housing type B (wide), DIN rail mount.

HD67812 allows to communicate KNX TP with RS485 Modbus RTU devices like SCADA, HMI or Modbus controllers. This version, equipped with the RS485 Master interface, is particularly suitable for projects where multiple Modbus devices must be connected in a multidrop configuration. The robust housing type B ensures mechanical strength, secure wiring, and reliable mounting inside industrial panels. Converter is easy to use thanks to free SW67812 software, which allows quick configuration and seamless deployment in complex installations.

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 clear mapping between KNX datapoints and Modbus registers, ensuring transparent and flexible data exchange. Engineers can easily scale solutions from small building projects to large industrial infrastructures.

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

With a high allocation of 1440 bytes for both reading and writing, the converter can handle a large volume of data, making it suitable for projects with many devices. Triple galvanic isolation increases reliability, preventing interference and protecting equipment in demanding environments.

Specifications:

• Ports: 1x KNX; 1x RS-485
• KNX protocol: KNX TP
• Modbus protocol: Modbus RS-485 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-485-B2

The device operates in extreme industrial conditions and is certified for continuous 24/7 operation, making it reliable for mission-critical projects in building automation and energy systems.

Configurator – Software SW67812 FREE DOWNLOAD

The HD67812-KNX-485-B2 is widely used in building automation (HVAC, lighting, security) and industrial automation projects. It enables legacy Modbus RS485 devices such as controllers, meters, or HMI panels to be integrated into modern KNX TP networks. This ensures full bidirectional data exchange between building and industrial environments.

Integrators value this converter for its ease of configuration, reliable performance, robust housing and wide temperature range. By linking Modbus and KNX, the device ensures future-proof integration while minimizing costs of replacing legacy equipment.

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