The Weinzierl KNX IO 411.1 secure (Art. 5514, SKU W 411.1) is a 1 TE 4-fold binary input for dry contacts (SELV). It is the companion to the voltage-input 410.1: same Secure application family (switch, dim, shutter, valuator, scene, colour, operating time, impulse counter) and 16 logic/time blocks, but contacts are potential-free with max. wire length 30 m and ≤100 ticks/s.

Impulse counting suits energy meters with S0 output or anemometers. Bus current is about 5 mA; housing ~55 g. Local dual buttons + three LEDs and programming LED match the 410.1 UX. For a native MATCH 55 KNX Secure wall button see 420.1; conventional 24 V rocker 436 wires into dry-contact inputs like this module.

Key Features — 411.1 Secure

• 4× dry contacts: SELV push buttons and window contacts.
• S0 / counters: Impulse counter for meters and sensors.
• KNX Data Security: Secure ETS application.
• 16 logic/time blocks: Compact automation in 1 TE.
• ~5 mA bus: Lightweight Secure input expansion.

At a Glance

Specification	Detail
Order / Art.	W 411.1 · Art. 5514
Inputs	4× dry contact · SELV · max. 30 m wire
Bus current	~5 mA
Width / weight	1 TE · ~55 g
Logic	16 independent logic/time functions
Security	KNX Data Security

Applications and Related Products

• Wall buttons & contacts: Bring conventional plates onto Secure TP.
• Voltage inputs: 410.1 for 12…230 V signals.
• MATCH 55 plates: 436 / 420.1.

Choosing and Commissioning

Keep wiring within 30 m and observe tick-rate limits. Use 410.1 instead if the field signal is not a dry contact. Official Secure ETS5 zip, manual, CAD and CE are under Downloads.