On this page you will find the most important information about Cala KNX IL (CO2). Do you still have questions?
Cala KNX IL CO2: Technical details and setting options
How to connect, set and optimally use the KNX CO2 indicator light
CO2 indicator light from Elsner Elektronik
What exactly is Cala KNX IL CO2?
Cala KNX IL CO2 is a CO2 indicator light to indicate the air quality via three colours (red, yellow, green, illuminated or flashing).
The product has the following features:
- Integrated CO2 threshold values
- Integrated CO2 PI control
- Four AND/OR logic gates
- Two actuating variable comparators
Putting into operation
How do I connect Cala KNX IL CO2?
Like all the products of the Cala series, Cala KNX IL CO2 can be integrated into any 55 × 55 mm frame range. It is fixed in the support ring with spring clamps (see No. 4).
The device has a KNX connection on the back and is supplied via the bus.
- Number 2 shows you the programming button to set Cala KNX IL CO2 into the programming mode.
- Number 3 shows the programming LED.
Default values
Which are the standard CO2 thresholds of Cala KNX IL CO2?
The carbon dioxide content in the air influences health and general well-being. You can find a detailed report on the measurement and control of indoor air quality and an article on the topic "Why you need a KNX CO2 sensor in your Smart Building" in the "Inspiration" section.
The following CO2 threshold values are standard for Cala KNX IL CO2:
- red = 2.000 ppm
- yellow = 1.200 ppm
- green <1.200 ppm
This overview shows you what consequences too high CO2 concentrations can have:
| CO2 concentration in ppm | What happens? |
| 200.000 | Rapid onset of unconsciousness, death |
| 100.000 | Nausea, unconsciousness, vomiting; extinguishing a candle |
| 30.000 | Breathing rate and volume increase |
| 6.000 | Harmful to health; exposure should only be for a short period of time; further disturbances of well-being occur. |
| 5.000 | Max. workplace concentration; limited stay of max. 8 hours daily |
| 2.000 | The risk of infection increases |
| 1.500 | Max. Indoor guideline; fatigue and drowsiness may set in |
| 1.000 | Comfort limit according to Pettenkofer; still acceptable in terms of air hygiene |
| 600-800 | High indoor air quality |
| 450 | Fresh, natural ambient air |
Use without sensor
I don't need a CO2 sensor, can I use the product without one?
Yes, Cala KNX IL is a product variant without CO2 sensor. This product is especially suitable:
- wherever a status display is necessary.
- as a level indicator for tanks.
- for displaying window contacts.
- for displaying fault messages.
- for visualising room occupancy, e.g. for conference rooms.