HD67813-KNX-485-B2 Industrial Modbus RS485 Slave to KNX TP Converter, Wide Housing

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

HD67813 allows communication between KNX devices such as air conditioning, heating, lighting, security systems and Modbus RTU devices with RS485 such as controllers or HMI panels.

The product features a capacity of up to 1440 bytes for both reading and writing. An important aspect is the triple isolation between the different parts of the device: KNX to the power supply, KNX to the serial port and power supply to the serial port, which increases safety and reliability of operation. The device enables bi-directional information exchange between KNX and Modbus, which is crucial for integrated building and industrial automation systems. This allows integrators to seamlessly connect modern KNX-based installations with existing RS485 Modbus infrastructures without compromising performance or safety.

The converter is equipped with one KNX port and one RS-485 port, supporting the KNX TP and Modbus RS-485 slave protocols respectively. The data rate is 9600 bit/s for KNX and up to 115200 bit/s for Modbus. The KNX connector is a standard KNX Bus connector, while the Modbus connector is a 3-pin 5mm screw connector. Power supply for the device can be from 8 to 24 VAC or 12 to 35 VDC via a 2-pin 5mm screw connector. Thanks to this wide voltage range, the converter can be integrated into new and existing systems without additional adapters.

The device is suitable for extreme conditions, with a temperature range of -40°C to +85°C (-40°F to +185°F), allowing it to be used in a variety of environments. It is compact, with dimensions of 71mm x 60mm x 95mm (DxWxH) and weighs approximately 200 grams, allowing for easy mounting on a standard 35mm DIN rail. The SW67813 software, which is an integral part of the device, supports its configuration and operation, all under product code HD67813-KNX-485-B2. The software simplifies mapping of datapoints and ensures that even complex projects can be configured quickly and reliably.

The SW67813 software enables advanced configuration of the device designed for efficient data exchange between the KNX system and Modbus. With this software, it is possible to specify Modbus and KNX line parameters, define messages and KNX frames, and determine which KNX bytes are to be written to the Modbus protocol and, conversely, which Modbus registers are to be written to the KNX protocol. The device also offers the possibility to update its firmware, keeping installations future-proof and aligned with evolving automation standards.

Configuration:

With the SW67813 software on your computer, you can:

• Define the Modbus line parameters
• Define the KNX line parameters
• Define the KNX messages that the converter can accept
• Define the KNX frames, that the converter sends over the KNX line
• Define which KNX bytes to write to the Modbus protocol
• Define which Modbus registers to write to the KNX protocol (KNX message)
• Update the device

The intuitive graphical interface allows fast configuration even in projects with multiple Modbus registers and KNX datapoints. This saves commissioning time and reduces integration errors, which is highly valued in complex BMS and industrial setups.

Characteristics:

• Up to 1440 bytes when reading and up to 1440 bytes when writing
• Triple isolation between KNX - power, KNX - serial port, power - serial port
• Bi-directional information exchange between KNX and Modbus
• Mountable on 35mm DIN rail

This capacity allows integration of HVAC controllers, lighting actuators, energy meters and alarm systems all within the same converter. The isolation ensures reliable operation even in electrically noisy industrial environments where surges or ground loops are common.

Specification:

• Ports: 1x KNX; 1x RS-485
• KNX protocol: KNX TP
• Modbus protocol: Modbus RS-485 slave
• KNX baud rate: 9600 bit/s
• Modbus baud rate: up to 115200 bit/s
• KNX connector: KNX Bus connector
• Modbus connector: 3-pin 5mm screw connector
• Power supply voltage: 8...24VAC; 12...35VDC
• Power connector: 2-pin 5mm screw connector
• Operating temperature: -40°C to +85°C (-40°F to +185°F)
• Dimensions: 71 mm x 60 mm x 95 mm (DxWxH)
• Weight: approx. 200g
• Mounting: on 35mm DIN rail
• Software: SW67813
• Product code: HD67813-KNX-485-B2

SW67813 software for model HD67813-KNX-485-B2 DOWNLOAD

The HD67813-KNX-485-B2 is widely used in HVAC management, energy metering, lighting systems, alarm integration, access control and renewable energy plants. It enables legacy RS485 Modbus slave devices such as energy meters, environmental sensors, weight scales and industrial controllers to be fully integrated into modern KNX TP networks.

By bridging these technologies, the converter extends the life of existing devices while allowing building managers to unify all automation functions under one platform. Its robust wide housing and stable 24/7 operation make it a cost-effective, professional-grade solution for integrators.

For more details and professional support, please contact our expert team.