Eelectron SB40A21KNX-PLWH KNX push-button sensor 4-way, with thermostat – white
Eelectron SB40A21KNX-PLWH KNX push-button sensor 4-way, with thermostat – white

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Eelectron

Eelectron SB40A21KNX-PLWH KNX push-button sensor 4-way, with thermostat – white

SKU: SB40A21KNX-PLWH
(0)
✗ UL Listed
This product has not been certified by an NRTL (UL, ETL, CSA or equivalent). Installation in USA projects may require a Field Evaluation by a recognized laboratory. Consult your local AHJ before specifying.
~ Low Voltage · SELV
This device operates on a Safety Extra Low Voltage circuit — such as the KNX 29V bus or a DALI 16V bus (NEC Class 2). When powered by an NRTL-listed power supply, many AHJs accept non-listed SELV devices. Verify with your local AHJ before specifying.
$118.90 USD
-27% $162.40 USD $118.90 USD
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The Eelectron SB40A21KNX-PLWH is a compact 4-channel KNX tactile push button with built-in thermostat in a 55 x 55 mm format, with a white plastic front. It is the OL-U/9025 alternative for projects standardised on 55 mm wiring-device ranges or on small single-gang positions: four keys, an RGB LED bar and a room temperature controller in a device that drops into an Italian 2-module, German or British box behind a standard 55 mm plate.

The four channels are configured in ETS for on/off, dimming, shutters and blinds, scene recall and learning, and sequences of up to three objects. The two-stage thermostat with PI controller drives heating and cooling equipment, valves and 2- or 4-pipe fan coils. A rear 2-pole connector is configured either as a dry-contact digital input or as an analog input for an external NTC probe (TS01A01ACC or TS01B01ACC) for direct temperature measurement.

The front RGB LED bar displays feedback or any value available on the bus. The device includes the KNX bus coupler and draws under 10 mA. A metal frame fixes it to the wall box; the 55 x 55 mm cover plate is not included and comes from the chosen wiring-device range.

Key Features

  • 4 tactile channels: on/off, dimming, shutters/blinds, scenes (recall and learn), 3-object sequences
  • 2-stage room thermostat with PI controller — heating, cooling, valves, 2- and 4-pipe fan coils
  • Rear 2-pole input: dry contact (≤10 m) or NTC probe TS01A01ACC / TS01B01ACC (≤20 m)
  • Front RGB LED bar for bus feedback
  • white plastic front finish
  • 55 x 55 x 37 mm device for Italian 2-module, German or British boxes; 55 mm plate not included
  • Bus powered, < 10 mA; bus coupler included
  • 120 group addresses / 160 associations; KNX certified

Technical Specifications

Power supply Via KNX bus, 21–32 V DC (SELV)
Current consumption < 10 mA
Channels 4 tactile push-button channels
Indicators RGB LED bar
Thermostat 2-stage with PI controller
Rear input – digital dry contact, scanning 3.3 V DC, cable ≤10 m (33 ft)
Rear input – analog NTC probe TS01A01ACC (-20…+100 °C) or TS01B01ACC (-50…+60 °C), cable ≤20 m (66 ft)
Group addresses / associations 120 / 160
Mounting Italian 2-module, German or British flush box via metal frame; 55 x 55 mm plate not included
Enclosure PC-ABS, IP20 (EN 60529); front: white plastic
Dimensions (W x H x D) 55 x 55 x 37 mm (2.17 x 2.17 x 1.46 in)
Operating temperature -5 to +45 °C (23 to 113 °F); storage -20 to +55 °C; RH max 90% non-condensing
Weight approx. 50 g (0.11 lb); packed 0.11 kg (0.24 lb)
Standards EN 50491-3, EN 50491-5-1, EN 50491-5-2, EN 50491-2; LVD 2014/35/EU, EMC 2014/30/EU
Certification KNX certified
ETS application Eelectron ETS application (download from eelectron.com)
Manufacturer part no. / GTIN SB40A21KNX-PLWH / 8054144521848

Related Products

Other finishes: SB40A01KNX-MT60, SB40A11KNX-PLBL. NTC probes: TS01A01ACC, TS01B01ACC. Larger keypads with the same thermostat logic: 9025 CS10A01KNX-x with glass covers, OL-U SO08A01KNX. 55 mm OL-U socket cover frames (PO55A01xx) can be used on neighbouring positions.

CE certified; not UL/NRTL listed — verify local code requirements before specifying in US installations.

Datasheet (PDF) · Available to order.

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