The Weinzierl KNX TP USB Interface Stick 332 (Art. 5254, SKU W 332) is a pocket-sized USB stick for connecting a PC or laptop to the KNX TP bus. It works as an ETS programming interface from ETS 3 upward and supports KNX Long Frames (APDU 233). The USB plug is galvanically isolated from KNX; two multicolour LEDs show status and bus errors.

Form factor is about 60 × 19 × 13 mm (~12 g) in transparent ABS, with a pluggable screw KNX terminal (0.14…1.5 mm²) and USB-A male (max. cable 5 m). Delivery includes a USB-C adapter. Like the DIN 312.1, the stick embeds BAOS V2 for developer use. For wireless RF commissioning use 340.

Key Features — 332 Stick

• Portable TP interface: Field commissioning without a DIN rail port.
• Long Frames: Faster downloads; required path for many Secure workflows.
• Galvanic isolation: USB ↔ KNX separation.
• USB-A + USB-C adapter: Works with modern notebooks.
• BAOS V2: Full stack option for OEM/SDK projects.
• Low draw: USB <10 mA · KNX <3 mA.

At a Glance

Specification	Detail
Order / Art.	W 332 · Art. 5254
Medium	KNX TP · HID/cEMI · APDU 233
Size / weight	60 × 19 × 13 mm · ~12 g
USB	Male Type A (+ USB-C adapter in box)
KNX terminal	Pluggable screw · 0.14…1.5 mm²
Protection	IP20 · indoor only

Applications and Related Products

• Service laptop kit: Carry-on interface for ETS group monitor and downloads.
• Fixed DIN alternative: 312.1.
• RF sites: 340 RF Stick.

Choosing and Commissioning

Use indoors only; observe KNX polarity marks on the enclosure. Prefer the DIN 312.1 when a permanent panel USB port is required. Official datasheet, manual, ETS zip and CE are under Downloads.