KNX Precipitation/Wind Sensors

The rain/wind sensor KNX RW measures precipitation and wind speed and transfers the values to the KNX system. Four switching outputs with three 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° 70126 KNX RW 230 V AC
N° 70127 KNX RW 20...30 V DC

  • KNX RW 230 V AC (70126) and KNX RW 20…30 V DC(70127) KNX RW 230 V AC (70126) and KNX RW 20…30 V DC(70127)
  • Precipitation perception: The surface of the sensor is heated so that only drops and flakes are recognised as precipitation but not fog or dew. If it stops raining or snowing, the sensor dries quickly and the precipitation message ends
  • Wind measurement: The wind strength measurement takes place electronically and thus moiselessly and reliably, even during hail, snow and sub-zero temperatures. Even turbulent air and anabatic winds in the vicinity of the weather station are recorded
  • Wind sensor monitoring: If the wind measurement value changes by less than ± 0.5 m/s within 48 hours, the maximum measurement value of 35 m/s is output as a fault message. All wind alarms with a limit value below 35 m/s become active as a result
  • 4 switching outputs, 3 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
20...30 V DC version: approx. 170 g
Ambient temperatureOperation -30…+50°C, storage -30…+70°C
Operating voltageAvailable for 230 V AC or for 20...30 V DC
Current230 V AC version: max. 20 mA
20...30 V DC version: max. 100 mA
Residual ripple 10%
Data outputKNX +/- bus terminal plug
Communication objects81
Heating rain sensorapprox. 1.2 W (230 V and 20...30 V DC)
Measurement range wind0…35 m/s