Order No. 2104 ..
1 Product definition
1.1 Product catalogue
Product name: CO2-Sensor
Use:
Sensor
Design:
FM (flush-mounted)
Order No.
2104 ..
1.2 Function
The device combines the functions of a KNX bus coupling unit, single-room temperature
controller with setpoint presetting, temperature and humidity sensor and CO
2
sensor in one bus
device. The room temperature controller, humidity and CO
2
-Sensor functions are each
independent function sections of the device with their own parameter blocks in the ETS. The
functions can be configured in the ETS.
In addition, the device has two binary inputs that can be disabled during operation, and by
means of which actuators can be controlled via KNX telegrams, e.g., for controlling fans or
window drives. Through the combination of all functions it is possible to monitor the indoor air
quality and to control measures for preserving the air quality via the bus.
CO
2
sensor functionality
The device can be used for determining the CO
2
content of the ambient air. Depending on
configured limiting values and current CO
2
actual value, telegrams can be transmitted to the
KNX for controlling fans or window drives. Four freely definable limiting values, which can be
used by switching command telegrams for controlling actuators or indications, can be
programmed for this purpose. The CO
2
content determined can be transmitted to the bus as a
2-byte measured value via a separate object and be made available to KNX display
components or to supplementary filter units, for example.
Since the measurement of correct values strongly depends on air pressure, a calibration
according to the height of the mounting location above NN (sea level) can be performed with the
aid of the ETS parameters.
Room temperature controller functionality
The device can be used for single-room temperature control. Depending on the operating mode,
the current temperature set value and on the room temperature, a variable for heating or cooling
control can be sent to the KNX. The controller distinguishes between different operating modes
(comfort, standby, night) each with their own temperature setpoints for heating or cooling.
In addition to the heating or cooling basic level, activating an additional heater and/or cooling
unit means that an additional heating or cooling unit can be used. In this connection, you can
set the temperature setpoint difference between the basic and the additional level by a
parameter in the ETS. For major deviations between the temperature setpoint and the actual
temperature, you can activate this additional level to heat up or cool down the room faster.
You can assign different control algorithms to the basic and additional stages. For heating and
cooling functions, you can select continuous or switching PI or switching 2-point feedback
control algorithms.
The room temperature can be recorded either by the internal or by an external temperature
sensor. A KNX communication object is available for the external temperature sensor by means
of which the temperature value received from the external bus, e.g. from a controller extension,
can be integrated into the temperature detection.
Humidity sensor functionality
The device can be used for determining the humidity of the ambient air. Depending on
configured limiting values and the current air humidity, value switching telegrams can be
transmitted to the KNX for controlling fans or window drives. The air humidity determined can be
transmitted to the bus as a 2-byte measured value via a separate object, and in this way, be
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Product definition
