10
SYSTEM OVERVIEW
inVENTer Connect controller platform | Operating instructions
2.3 Sensor technology
Different sensors are available in the inVENTer Connect controller platform. These are required
to monitor the relevant parameters in the various ventilation zones and to ensure automated
ventilation control according to the set profiles. Demand-controlled ventilation is enabled in the
ventilation zone assigned to the sensor on the basis of the respective reference variable.
The CO
2
sensor also has a humidity/temperature sensor.
For initial setup and to integrate the sensor system into the ventilation system (
3.2;
3.3),
a button and an associated LED are used in each case.
The data transmission between the sensors and controller takes place at fixed intervals. Depend
-
ing on the sensor, the value determination is defined as a fixed cycle or as a check cycle:
• Fixed cycle (60 minutes):
Here the sensor system sends a signal to the controller together with the sensor value
(temperature, humidity, CO
2
content), thereby reporting its status.
• Check cycle:
Here the sensor values are read periodically and checked whether they correspond to the
specified value or are within the tolerance range for this value.
If there are any deviations, the newly measured data is transmitted to the controller.
CS2-Connect CO
2
sensor (incl. humidity/temperature sensor)
Figure 1: CS2-Connect CO
2
sensor
The CO
2
content is a good indicator of the air quality in the room. The higher the CO
2
content of
the air, the worse the air quality.
The CO
2
sensor is used for background monitoring of the CO
2
concentration in the indoor air in the
ventilation zone in question. It also has a humidity/temperature sensor for monitoring the humidity
indoors as well as the indoor temperature.
The CO
2
sensor operates according to the NDIR (non-dispersive, infrared) measuring principle
by using an infrared light tuned to the wavelength of CO
2
. The attenuation of the infra-red light is
detected by the sensor and converted into a processable output signal. It detects the CO
2
concen-
tration in the ambient air within a range of 400 – 10,000 ppm.
It transmits the CO
2
values determined to the controller by radio (RF868MHz network) or
RS485 data cable. If the measured
CO
2
content of the indoor air exceeds the limit defined via the
app (factory setting 1,500 ppm), all ventilation units assigned to the ventilation zone are switched
to ventilation operating mode, level 3.
1 Housing with sensor electronics
2 LED (multi-coloured)
3 Button
1
2
3
