Sewi KNX TH L-Pr

The Sensor Sewi KNX TH-L-Pr for the KNX bus system captures the presence of persons even in the event of slight movements, such as sedentary activity in the office. Permanentbrightness monitoring means that the light can be switched off from an adjustable brightness value. It measures the temperature and the air humidity and calculates the dew-point. Via the bus, the indoor sensor can receive external values of temperature and humidity and process them further with its own data to a total value (mixed value, e.g. room average).
All measurement 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. In addition, an integrated control variable comparator can compare and output variables that were received via communication objects.
Integrated PI-controllers control ventilation (according to humidity) and heating/cooling (according to temperature). The Sewi KNX TH-L-Pr can output a warning to the bus as soon as the comfort field, as per DIN 1946, is left.

Models:

N° EL-70398 Sewi KNX TH L-Pr sensor for temperature, humidity, brightness, presence, white
N° EL-70698 Sewi KNX TH L-Pr sensor for temperature, humidity, brightness, presence, jet black

Functions

• Brightness measurement with brightness regulation
• Presence of persons is detected
• Temperature and humidity measurement (relative, absolute), in each case with mixed value calculation. The share of internal measurement value and external value can be set as a percentage
• Bus warning with regard to whether the values for temperature and air humidity are within the comfort field (DIN 1946). Dewpoint calculation
• PI-controller for heating (one or two-stage) and cooling (one or two-stage) according to temperature. Regulation according to separate setpoints or basic setpoint temperature
• PI controller for humidity according to humidity: Ventilate/Air (one-stage) or Ventilate (one or two-stage) 
• 4 actuation variable comparators to output minimum, maximum or average values. 5 inputs each for values received via communication objects
• Summer compensation for coolers. A characteristic curve matches the set temperature in the room to the external temperature and sets the minimum and maximum target temperature values
• Switching outputs for all measured 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 from each gate can be configured optionally as 1-bit or 2 x 8-bit
• 8 multi-functional modules (computers) for changing the input data by calculations, by querying a condition or by converting the data point type
• Configuration is carried out with the KNX software ETS

Technical Data