Eelectron IO42E01KNX KNX flush-mounted module 4-way binary input, 2-way switching output, BLE beacon

SKU: IO42E01KNX
✗ 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.
⚡ Mains Voltage · No US Cert
This device operates with or switches mains voltage (120/240VAC) and has not been certified by an NRTL. USA installation requires a Field Evaluation by a recognized laboratory and explicit AHJ approval.
Regular price $143.90 USD
Regular price -27% $196.00 USD Sale price $143.90 USD
In stock
On backorder
KNX & DALI Specialists

Not sure which device fits your project? Our team speaks KNX. Contact us for a free technical recommendation.

Free shipping over $500
KNX certified devices
Expert technical support

The Eelectron IO42E01KNX is a flush-mount (in-wall) KNX multifunction module with 4 inputs, 2 bistable relay outputs and an integrated Bluetooth Low Energy beacon, configurable in ETS for KNX Data Secure. At 52 x 28 mm it fits behind a switch plate or in a ceiling box, which makes it the natural choice for retrofits and for hotel rooms where a few local loads and contacts must join the bus without running cable back to the panel.

Two inputs are digital, one is digital/analog and one is digital/analog/smart-sensor: NTC probes (TS01A01ACC, TS01B01ACC, TS01D01ACC) feed a complete 2-stage PI thermostat, and input 4 accepts the SM03E01ACC (CO₂ + temperature) or SM03E02ACC (VOC/eCO₂ + temperature) plug-in sensors for air quality. The two 10 A relays work independently, as a shutter pair, as a servomotor pair or with logic interlock. The iBeacon/Eddystone-compatible BLE beacon lets a guest app detect which room it is in, and the Virtual Holder logic derives reliable occupancy from a door contact plus presence sensors.

Key Features

  • 2 digital inputs + 1 digital/analog input + 1 digital/analog/smart-sensor input (dry contacts, SELV)
  • 2 bistable relay outputs, 10 A cos φ 1 at 230 V AC: independent loads, one shutter/blind channel, servomotor pair or interlocked
  • Inputs 3 and 4 accept NTC probes TS01A01ACC / TS01B01ACC / TS01D01ACC; complete 2-stage PI thermostat for heating, cooling, valves and 2/4-pipe fan coils
  • Input 4 hosts plug-in smart sensors SM03E01ACC (temperature + CO₂) or SM03E02ACC (temperature + VOC/eCO₂)
  • KNX Data Secure communication configurable in ETS
  • Integrated BLE beacon (iBeacon and Eddystone formats) with adjustable transmission interval and signal strength
  • 12 logic blocks with logical, threshold, algebraic and conditional operators; proportional-control and dew-point algorithms
  • Virtual Holder logic for hotel-room presence detection
  • Wired AWG26 input leads (90 mm), screw terminals for outputs; nylon housing, 52 x 28 mm, approx. 50 g

Technical Specifications

Power supply Via KNX bus, 21–32 V DC (SELV)
Current consumption < 10 mA
Inputs (digital mode) Dry contacts; scanning voltage 3.3 V DC (internally generated); max cable 10 m (33 ft) twisted; AWG26 leads 90 mm
Inputs (analog mode) NTC TS01A01ACC (-20 to +100 °C), TS01B01ACC (-50 to +60 °C), TS01D01ACC (-5 to +45 °C); max cable 30 m (98 ft) twisted
Outputs 2 relays, 10 A cos φ 1 at 230 V AC; resistive 10 A, incandescent 6 A, inductive (motor) 3 A; check LED driver inrush
Wireless BLE beacon, iBeacon / Eddystone compatible
Logic blocks 12
Group addresses / associations 264 / 308
Mounting Flush-mount wall or ceiling box
Enclosure Nylon, IP20 (EN 60529); protection class III; overvoltage class III; pollution degree 2
Dimensions Ø 52 x 28 mm (2.05 x 1.10 in)
Operating temperature -5 °C to +45 °C (23 °F to 113 °F)
Storage temperature -20 °C to +55 °C (-4 °F to 131 °F)
Relative humidity max 90 % non-condensing
Standards EN 63044-5-1 / EN 63044-5-2; EN 50491-2; LVD 2014/35/EU; EMC 2014/30/EU
Certifications KNX certified; CE
ETS application IO42E01KNX application with KNX Data Secure
Weight (net) 0.09 kg (0.20 lb)
Manufacturer part no. / GTIN IO42E01KNX / 8054144522630

Related Products

Input-only in-wall interfaces: IO22D02KNX, IO44D02KNX / IO44D02KNX-S (secure), IO62D02KNX; analog/LED in-wall module AD84C01KNX. Accessories: TS01A01ACC / TS01B01ACC / TS01D01ACC probes; SM03E01ACC / SM03E02ACC plug-in sensors. DIN-rail equivalent with more channels: IO04F01KNX.

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

Datasheet (PDF) · Available to order.

Orders over $500 ship free within the USA (under 50 lbs). Orders under $500 carry a low cost shipping fee.

Most in-stock orders ship within 1–2 business days from Miami, FL. Delivery typically takes 3–5 business days depending on destination.

For freight or oversized orders, our team will contact you with a custom quote.

All KNXSupply products are covered by the manufacturer's warranty, ranging from 1 to 3 years depending on the brand. Warranty terms are fulfilled directly by the manufacturer.

If you experience any issue, contact us and we'll coordinate the claim process on your behalf.