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The Eelectron SB40A01KNX-MT60 is a compact 4-channel KNX tactile push button with built-in thermostat in a 55 x 55 mm format, with a brushed aluminium (metal) 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.
| 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: metal |
| 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 | SB40A01KNX-MT60 / 8054144521794 |
Other finishes: SB40A11KNX-PLBL, SB40A21KNX-PLWH. 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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