The Air Quality Sensor KNX AQS-B-UP measures the CO2 concentration in the
room. The sensor can receive an external CO2 value via the bus and process it with the own data to an overall value (mixed value, e. g. room average). The KNX AQS-B-UP offers two push buttons that can be used as free programmable bus push buttons.

The KNX AQS-B-UP provides four switching outputs with adjustable threshold values. The switching outputs and further communication objects can be linked by AND and OR logic gates. Additionally, an integrated actuating variable comparator can compare and output values that are received via communication objects.
An integrated PI controllers allows for control of ventilation depending on CO2 concentration.

The integrated display shows the own values and data received from the bus (e. g. date, time). The housing is completed with a frame of the switching series installed in the building and thus merges with the interior.

Functions and Operation:
Measurement of CO2 concentration of the air
Mixed value from own measured value and external value (proportions can be set in percentage)
Display 1-3 rows (own values or values received from the bus)
2 bus push buttons
PI controller for ventilation depending on CO2 concentration:
dehumidification/humidification (one step) or dehumidification (one or two step)
4 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
2 actuating variable comparators for output of minimum, maximum or
avarage values. Each with 5 inputs (for values received via communication objects)
Configuration is accomplished by means of the KNX software ETS

Technical Data:
Housing Plastic material (partly lacquered)
Colours White glossy (similar to RAL 9016 Traffic White)
Aluminium matt
Anthracite matt
Stainless steel
Special colours on request
Mounting In-wall (in socket Ø 60 mm, 42 mm deep)
Protection category IP 20
Dimensions Housing approx. 55 × 55 (W × H, mm),
mounting depth approx. 15 mm,
base plate approx. 71 × 71 (W × H, mm)
Total weight approx. 72 g
Ambient temperature Operation -10 +50°C, storage -20 +60°C
Ambient air humidity max. 95% RH, avoid bedewing
Operating voltage KNX bus voltage
Bus current max. 10 mA
Data output KNX +/- bus terminal plug
Communication objects 157
Measurement range CO2 0 2000 ppmMeasurement range humidity 0 95%