Description
Introduction
The WEINZIERL KNX RF/TP Coupler 673.1 secure (Art.-Nr. 5474) is a compact radio coupler designed to seamlessly connect KNX RF devices on a wireless line directly with a KNX Twisted Pair (TP) bus system. Operating in the 868.3 MHz ISM band using FSK modulation with an output power of 6 dBm and an internal antenna, it provides a reliable wireless bridge powered directly via the KNX bus line at approximately 10 mA. This device is part of our professional KNX Gateway range.

Housed in transparent ABS plastic designed for standard flush-mounted boxes (48 x 40 x 18 mm), the coupler features robust AES-128 KNX Data Security. It includes an extended filter table for main group 0…31, a buffer for 2 x 20 telegrams, and support for KNX Long Frames. When integrated with an ETS 6 database, it unlocks full Security Proxy and Segment Coupler functionality.
Key Features
- RF Interface: 868.3 MHz ISM band, FSK modulation, 6 dBm output power, internal antenna.
- Data Security & Proxy: AES-128 KNX Data Security with Security Proxy and Segment Coupler support in ETS 6.
- Diagnostic Controls: 2 front buttons for disabling filter tables during testing, plus 3 multicolor LEDs for status and error monitoring.
- Programming Interface: Dedicated KNX programming button with red LED indicator.
- Physical Design: Transparent ABS plastic housing designed for flush-mount box installations.
- Bus Connection: Standard red/black terminal for KNX TP bus connection.
Benefits
- Seamless Wireless Integration: Connects KNX RF radio lines directly to the KNX TP bus network.
- Enhanced Security: Supports KNX Data Security with AES-128 encryption for safe telegram transmission.
- Ultra-Compact Form Factor: Measures 48 x 40 x 18 mm and weighs approx. 20 g, easily fitting in standard flush-mounted boxes.
- Bus Powered: Operates directly off the KNX bus power supply (approx. 10 mA) without requiring external power.
- Advanced Traffic Control: Features an extended filter table for main groups 0…31 and a 2 x 20 telegram buffer.
- ETS Compatibility: Compatible with ETS 5 and ETS 6, enabling Long Frames and specialized ETS 6 security features.
Applications
- RF to TP Coupling: Integrating wireless KNX RF switches, sensors, or actuators into a wired KNX TP infrastructure.
- Retrofit Solutions: Adding KNX functionality to existing buildings where running additional wired bus cables is difficult.
- Secure Segment Coupling: Implementing secure RF lines using ETS 6 Security Proxy capabilities.
Installation Notes
- Mounting: Position the device inside a standard flush-mounted junction box using its compact 48 x 40 x 18 mm frame.
- Bus Wiring: Connect directly to the KNX bus using the standard red/black bus connector (power consumption approx. 10 mA).
- Testing: Use the front panel buttons to temporarily disable telegram filtering during network commissioning and testing.
Developer Resources
- Official WEINZIERL documentation includes product data sheets, technical manuals, 3D CAD models, CE declarations, and ETS 5 / ETS 6 database files.
FAQ
How is the WEINZIERL KNX RF/TP Coupler 673.1 secure powered?
The device is powered directly from the KNX bus line, drawing approximately 10 mA. Explore more WEINZIERL building automation products for professional building automation projects.
Which ETS software versions support this coupler?
It is compatible with ETS 5 and ETS 6. However, Security Proxy and Segment Coupler features require the ETS 6 database.
Can the telegram filter be disabled for diagnostics?
Yes, pressing the buttons on the front panel allows installers to disable the telegram filter for testing purposes.
What is the exact product model?
The order/model code for this page is KNX RF/TP Coupler 673.1 secure. Match it against project documents before purchase.
Who is the manufacturer?
This product is manufactured by WEINZIERL.
Where can I find the official technical documentation?
Use the manufacturer product page and datasheets for this exact SKU. Always verify the latest revision before specifying the product.
Conclusion
The WEINZIERL KNX RF/TP Coupler 673.1 secure offers a highly efficient, bus-powered solution for bridging wireless RF lines to wired KNX TP systems. With built-in AES-128 security, diagnostic LEDs, and compact flush-mount dimensions, it provides seamless system expansion. Installers and system integrators can review our installer purchasing support options.
For precise project engineering and BOQ fulfillment, verify order code Art.-Nr. 5474 and download the official ETS 5 or ETS 6 database files.













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