WEINZIERL KNX USB Interface 312.1

Description

KNX USB Interface 312.1 for ETS Programming and KNX Bus Access

The KNX USB Interface 312.1 from WEINZIERL is a professional data interface designed to connect a PC or laptop with a KNX installation bus. It is intended for use as a programming interface for ETS® Software and provides reliable communication between engineering tools, software applications, and KNX installations.

For integrators, panel builders, KNX programmers, and smart building professionals, the KNX USB Interface 312.1 offers a practical and compact way to access the KNX bus from a computer. Its DIN rail design and 1 TE width make it suitable for installation in distribution boards where space efficiency matters.

You can explore more KNX automation solutions at KNX Bazzar, browse related products in the KNX system components category, or view more WEINZIERL products in the WEINZIERL brand collection.

KNX USB Interface 312.1 Key Features

The KNX USB Interface 312.1 is more than a simple USB connection point. According to WEINZIERL, it supports KNX Long Frames, which enable faster downloads to devices that also support long telegrams. This capability is also necessary for KNX Security.

• Data interface between a PC or laptop and the KNX installation bus
• Can be used as a programming interface for ETS® Software
• Supports KNX Long Frames for faster downloads to compatible devices
• Supports requirements related to KNX Security
• USB connector with USB-C connection
• USB connector is galvanically isolated from the KNX bus
• LED indicators for operating status and communication errors on the bus
• KNX 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
• DIN rail mounted device with 1 TE width

Professional KNX Communication via USB-C

The KNX USB Interface 312.1 uses a USB-C connector, and the USB connector is galvanically isolated from the KNX bus. This separation is an important product characteristic stated by the manufacturer and supports reliable integration between computer-based programming tools and the KNX installation bus.

The KNX USB communication is based on HID and cEMI telegram coding according to the KNX specification. This makes the interface suitable for applications that require standardized KNX telegram handling. For software integration on Windows or Linux, WEINZIERL provides the cross-platform SDK kDrive.

Support for KNX Long Frames and KNX Security

A major advantage of the KNX USB Interface 312.1 is support for KNX Long Frames. Long telegrams enable faster download processes when working with devices that support these telegrams. The manufacturer also states that Long Frames are necessary for KNX Security.

This makes the interface relevant for modern KNX projects where ETS programming speed, reliable bus communication, and security-related KNX functionality are important. When used with ETS® Software, the device can serve as the connection point between the engineering workstation and the KNX bus.

Integrated KNX Stack and BAOS Protocol V2

In addition to the telegram interface via cEMI, the KNX USB Interface 312.1 includes a complete KNX Stack with communication objects and BAOS protocol V2. This allows devices with a USB connection, such as boards with embedded Linux, to be extended to full KNX devices. These devices can even be programmed with ETS.

For developers and manufacturers working with KNX integration, this capability creates a pathway for connecting USB-based platforms to the KNX ecosystem. WEINZIERL notes that further information about this solution and available SDKs can be obtained directly from the manufacturer.

Technical Specifications

Applications

The KNX USB Interface 312.1 is suitable for professional KNX environments where a direct data connection between a computer and the KNX installation bus is required.

• ETS® programming of KNX installations
• Commissioning and configuration workflows using ETS3 or later
• KNX bus access from a PC or laptop
• Software applications using HID and cEMI telegram coding
• Development projects using Windows or Linux with the kDrive SDK
• USB-connected platforms, including boards with embedded Linux, extended to KNX devices through the included KNX Stack and BAOS protocol V2

Installation Notes

The device is specified as a DIN rail mounted unit with a width of 1 TE. It is designed for integration in KNX distribution environments where a compact programming and data interface is required. The USB-C connector provides the connection to the PC or laptop, while the device interfaces with the KNX installation bus.

The LEDs on the device provide visual indication of operating status and communication errors on the bus. This helps during commissioning, programming, and diagnostic work with KNX installations.

FAQ

What is the KNX USB Interface 312.1 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.

Does it support ETS?

Yes. The manufacturer states compatibility with ETS3 or later.

Does the interface support KNX Long Frames?

Yes. The KNX USB Interface 312.1 supports KNX Long Frames, which enable faster downloads to compatible devices and are necessary for KNX Security.

Is the USB connection isolated from the KNX bus?

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

Can it be used for software development?

Yes. WEINZIERL states that KNX USB communication is based on HID and cEMI telegram coding, and the cross-platform kDrive SDK is available for integration in Windows or Linux applications.

Manufacturer Reference and Dealer Information

For official manufacturer details, visit the WEINZIERL product page: KNX USB Interface 312.1 by WEINZIERL.

If you are planning KNX projects, system integration, or product distribution, you can also become a dealer with KNX Bazzar.