The Weinzierl KNX RF USB Interface Stick 340 (Art. 5110, SKU W 340) establishes a bidirectional link between a PC/laptop and the KNX RF wireless medium. It complies with KNX RF, speaks HID/cEMI, and is compatible with ETS 5 or higher. Power comes from USB (typical ~20 mA, max. 40 mA, standby <1 mA).

RF uses the ISM band 868.3 MHz FSK with ~11 dBm output and an internal antenna. Max. APDU length is 196. Size is about 71 × 23 × 8.7 mm (~10 g) with one multicolour LED and USB-A male. For TP wired commissioning use 312.1 or 332. Free kDriveExpress SDK covers Windows/Linux integration; BAOS V2 is available for developers.

Key Features — 340 RF Stick

• KNX RF media: Commission and diagnose wireless KNX devices.
• ETS 5+: Official programming interface for RF projects.
• 868.3 MHz FSK: 11 dBm · internal antenna.
• USB powered: No separate PSU; HID/cEMI.
• Compact stick: ~10 g · indoor use only.
• BAOS V2 / SDK: OEM and software integration path.

At a Glance

Specification	Detail
Order / Art.	W 340 · Art. 5110
Medium	KNX RF · HID/cEMI · APDU 196
RF	868.3 MHz FSK · 11 dBm · internal antenna
USB current	Typical 20 mA · max. 40 mA · standby <1 mA
Size / weight	71 × 23 × 8.7 mm · ~10 g
Protection	IP20 · indoor

Applications and Related Products

• Mixed TP/RF sites: Pair with a TP USB stick for full media coverage.
• TP companions: 332 / 312.1.

Choosing and Commissioning

Indoor use only; keep clear of metal shielding that blocks 868 MHz. Load the ETS5 database from Downloads. Radio equipment CE (RED) applies — see CE declaration.