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KNX R sl

Precipitation sensor

The Precipitation Sensor KNX R sl for the KNX building bus system detects precipitation. One switching output, AND logic gates and OR logic gates are available.

The compact housing of the KNX R sl accommodates the sensors, evaluation circuits and bus-coupling electronics.

  • KNX R sl KNX R sl
  • KNX R sl lateral view KNX R sl lateral view
  • KNX R sl from above KNX R sl from above
  • Precipitation detection: The sensor surface is heated, so that only drops and flakes are recognised as precipitation, but not mist or dew. When the rain or snow stops, the sensor is soon dry again and the precipitation warning ends 
  • 2 switching outputs (communication objects) 
  • 4 AND and 4 OR logic gates, each with 4 inputs. All switching events as well as 16 logic inputs (in the form of communications objects) can be used as inputs for the logic gates. The output of each gate can be configured optionally as 1-bit or 2 x 8-bit 
  • Configuration is made using the KNX software ETS (as of version 5)


Housing Plastic
Colour White / Translucent
Assembly On-wall or pole
Protection class IP 44
Dimensions (W x H x D) approx. 62 mm × 75 mm × 155 mm
Total weight approx. 80 g
Ambient temperature -25…+85°C
Storage temperature -30…+85°C

KNX bus:

Configuration modeS-Mode
Group addressesmax. 254
Assignmentsmax. 254
Communication objects 54
Power consumptionmax. 10 mA
Data outputKNX +/-
Connection KNX plug terminals0.6…0.8 mm² s
Stripping length5 mm
Duration after bus voltage restoration until data is receivedapprox. 4 s


Auxiliary supply 20...32 V DC
Auxiliary current at 24V DC: max. 90 mA