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KNX Brightness/Wind Sensors

The brightness and wind Sensor KNX LW measures the intensity of illumination and wind speed and transfers the values to the KNX system. Nine switching outputs with adjustable threshold values as well as additional AND and OR logic gates are available. The sensor system, the evaluation electronics and the electronics of the bus connection are mounted in a compact housing.


N° 70128 KNX LW 230 V AC
N° 70129 KNX LW 12...40 V DC / 12...28 V AC

KNX LW 230 V AC (70128)
  • Brightness measurement: The current light intensity is measured by a sensor
  • Wind measurement: The wind strength measurement takes place electronically and thus noiseless and reliable even in case of hail, snow and sub-zero temperatures. Even turbulent air and anabatic winds in the vicinity of the weather station are recorded
  • 9 switching outputs with adjustable threshold values (Threshold values can be set by parameter or via communication objects)
  • 8 AND and 8 OR logic gates with each 4 inputs. Every switching incident as well as 8 logic inputs (in the form of communication objects) may be used as inputs for the logic gates. The output of each gate may optionally be configured as 1 bit or 2 x 8 bits
  • Configuration is made using the KNX software ETS
HousingPlastic material
ColourWhite / translucent
Protection categoryIP 44
Dimensionsapprox. 96 × 77 × 118 (W × H × D, mm)
Weight230 V AC version: approx. 240 g
12...40 V DC / 12...28 V AC version approx. 170 g
Ambient temperatureOperation -30…+50°C, storage -30…+70°C
Operating voltageAvailable for 230 V AC or 20...32 V DC
Current230 V AC version: max. 20 mA,
12...40 V DC / 12...28 V AC version: at 12 V DC max. 30 mA. max. 0,4 W
Residual ripple 10%
Data outputKNX +/- bus terminal plug
Communication objects117
Measurement range wind0…35 m/s
Measurement range brightness0…150 000 lux