Suntracer KNX pro

Weather Station

The Weather Station Suntracer KNX pro for the KNX building bus system measures temperature, wind speed, wind direction, brightness, air humidity and air pressure. It recognises precipitation and receives the GPS signal for time and location. In addition, using location coordinates and the time, it calculates the exact position of the sun (azimuth and elevation).

All values can be used for the control of limit dependent switching outputs. States can be linked via AND logic gates and OR logic gates. Multi-function modules change input data as required by means of calculations, querying a condition, or converting the data point type.

The integrated shade control system allows intelligent sun protection control of up to 12 facades.

  • Sensors Sensors
  • Suntracer KNX pro top view Suntracer KNX pro top view
  • Brightness measurement (current light strength). Measurement with 5 separate sensors, output of the current highest value (one maximum value). Separate limit values for night
  • GPS receiver, outputting the current time and location coordinates. The Weather Station Suntracer KNX pro also computes the position of the sun (azimuth and elevation)
  • Shade control for up to 12 façades with slat tracking and shadow edge tracking
  • Wind measurement: Measurement of wind strength and wind direction (0°-360°) by ultrasound
  • 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
  • Temperature measurement. Calculation of the apparent temperature (considering wind strength and air humidity)
  • Frost protection for shading systems
  • Air humidity measurement (relative, absolute)
  • Bus message, whether the values of temperature and humidity are within the comfort field (DIN 1946). Calculation of the dew point
  • Air pressure measurement
  • Weekly and calendar time switch: All time switching outputs can be used as communication objects. The weekly time switch has 24 periods. Each period can be configured either as an output or as an input. If the period is an output, then the switching time is set per parameter or per communication object. The calendar time switch has 4 periods. Two on/off switching operations, which are executed daily, can be set for each period
  • Switching outputs for all measured and computed values. Threshold values can be adjusted per parameter or via communication objects
  • 8 AND and 8 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
  • 8 multi-function modules (computers) for changing the input data by calculations, by querying a condition or by converting the data point type
  • Summer compensation for cooling systems. A characteristic curve matches the target temperature in the room to the external temperature and sets the minimum and maximum target temperature values.

Configuration is made using the KNX software ETS

ColourWhite / Translucent
Degree of protectionIP 44
Dimensions weather stationapprox. 255 × 140 × 274 (W × H × D, mm)
Dimensions pole extensionLength approx. 50 cm, pipe diameter approx.
50 mm, mounting for pole 40-60 mm (screw brackets),
plate approx. 130 x 110 x 3 (W × H × D, mm)
Dimensions power supply unitapprox. 54 × 95 × 68.5 (W × H × D, mm), 3 modules
Weight weather station approx. 600 g
Weight pole extensionapprox. 1 kg (incl. screw brackets)
Weight power supply unitapprox. 210 g
Weight connection accessoriesapprox. 430 g
Ambient temperatureOperation -30…+50°C, storage -30…+70°C
Auxiliary supply24 V DC ±10% (white + / yellow GND)
Power consumptionheating off (at temperature > 7,5°C): 6 W
heating on (at temperature ≤ 7,5°C): up to 40 W
Bus currentmax. 10 mA
Data outputKNX +/-
Group addressesmax. 2000
Assignmentsmax. 2000
Communication objects1,415


Measurement range-30°C … +50°C
Accuracy±0.5°C at -30°C … +25°C
±1.5°C at -30°C … +45°C

Air humidity:

Measurement range0% rH … 100% rH
Resolution0.1 % rH
Accuracy±7,5% at 0…10% rH
±4,5% at 10…90% rH
±7,5% at 90…100% rH

Pressure sensor:

Measurement range300 mbar … 1100 mbar
Resolution0.1 mbar
Accuracy±4 mbar

Wind speed:

Measurement range0 m/s … 35 m/s
Resolution0.1 m/s
Accuracyat wind speed v <5 m/s: ±0,5 m/s
at wind speed v >5 m/s: ±10%

Wind direction:

Measurement range0...360° (from wind speed v >0,5 m/s)


Measurement range0 lux … 150,000 lux