WEINZIERL KNX USB Interface 332 Stick

Description

Introduction

The WEINZIERL KNX USB Interface 332 Stick is a compact data interface between a PC or laptop and the KNX installation bus. It is designed for professional commissioning and service work with ETS® Software Version 3 or higher, while also supporting KNX long frames for faster downloads to devices that can receive long telegrams.

Beyond standard ETS access, the interface can be used to program KNX Secure devices using ETS. Its USB communication is based on HID and cEMI telegram coding according to the KNX specification, making it suitable for both day-to-day KNX commissioning and integration-oriented workflows.

For related products from the same manufacturer, visit the WEINZIERL KNX range at KNX Bazzar.

Key Features

• Data interface between a PC or laptop and the KNX installation bus.
• Can be used as a programming interface for ETS® Software Version 3 or higher.
• Supports KNX long frames for faster downloads to compatible devices.
• Can be used to program KNX Secure devices using ETS.
• LEDs indicate operating status and communication errors on the bus.
• USB connector is galvanically isolated from the KNX bus.
• USB communication based on HID and cEMI telegram coding according to the KNX specification.
• Includes a complete KNX Stack with communication objects and BAOS protocol V2.
• Supplied in a practical plastic box with a replacement plug and USB-C adapter.
• Flexible cable helps reduce mechanical force on the laptop connection.

Benefits

For KNX engineers and system integrators, this interface provides a straightforward route from ETS to the KNX bus without unnecessary complexity. Support for ETS3 or later makes it suitable for established engineering environments, while long-frame support helps reduce download time when working with devices that can process long telegrams.

The ability to program KNX Secure devices using ETS is especially valuable for modern KNX projects where secure commissioning is required. The galvanic isolation between the USB connector and KNX bus also supports robust field use during commissioning, troubleshooting and maintenance.

For product developers and advanced integrators, the inclusion of a complete KNX Stack with communication objects and BAOS protocol V2 opens additional use cases beyond a standard USB programming interface.

Technical Specifications

Applications

• ETS commissioning of KNX installations from a PC or laptop.
• Programming KNX devices with ETS® Software Version 3 or higher.
• Programming KNX Secure devices using ETS.
• Service, diagnostics and troubleshooting where bus communication status and errors need to be observed via device LEDs.
• Faster ETS downloads to KNX devices that can receive long telegrams.
• Development or integration of USB-connected devices as full KNX devices using the integrated KNX Stack, communication objects and BAOS protocol V2.

Installation Notes

Use the interface as a data link between the commissioning computer and the KNX installation bus. The device is intended for ETS® Software Version 3 or higher and supports KNX long frames where the target devices can receive long telegrams.

The supplied USB-C adapter can be used where a USB-C connection is required. The practical plastic box also includes a replacement plug. The flexible cable is designed to reduce mechanical force on the laptop connection during use on site.

During commissioning or diagnostics, observe the device LEDs for operating status and communication errors on the bus. The USB connector is galvanically isolated from the KNX bus.

Developer Resources

The KNX USB communication is based on HID and cEMI telegram coding according to the KNX specification. For integration in applications running on Windows or Linux, Weinzierl provides the cross-platform kDrive SDK.

In addition to the telegram interface via cEMI, the device includes a complete KNX Stack with communication objects and BAOS protocol V2. This allows devices with a USB connection to be extended into full KNX devices that can even be programmed by ETS.

• SDK mentioned by manufacturer: kDrive
• Test tool for KNX and BAOS binary protocol: Net’n Node
• Protocol description: KNX BAOS Binary

FAQ

What is the KNX USB Interface 332 Stick used for?

It is used as a data interface between a PC or laptop and the KNX installation bus. It can also be used as a programming interface for ETS® Software Version 3 or higher.

Does it support KNX Secure commissioning?

Yes. The interface can be used to program KNX Secure devices using ETS.

Does the interface support KNX long frames?

Yes. It supports KNX long frames. Long telegrams enable faster downloads to devices that can receive these telegrams.

How are operating status and bus errors indicated?

LEDs in the device indicate the operating status and communication errors on the KNX bus.

Is the USB connection isolated from the KNX bus?

Yes. The USB connector is galvanically isolated from the KNX bus.

Are developer tools or protocols available?

Yes. Weinzierl mentions the cross-platform kDrive SDK for Windows and Linux applications, the Net’n Node test tool, and the KNX BAOS Binary protocol description.

Conclusion

The WEINZIERL KNX USB Interface 332 Stick is a practical commissioning and integration interface for professional KNX work. It combines ETS3-or-later programming, long-frame support, KNX Secure device programming, galvanic USB isolation and BAOS protocol V2 in a compact stick format supplied with useful accessories.

For manufacturer information, see the official WEINZIERL product page. To explore more KNX products, visit the KNX Bazzar shop.