Brochure on KNX home and building control
On nearly 90 pages, you will find practical solution examples around KNX home and building control that are worth knowing.
ETS example 3: Sun protection control with KNX
You can download the preconfigured project as a knxproj. file at this link:
MIX2 actuators: intelligent, flexible, expandable
In an easily understandable way, our MIX2 videos show you the various advantages of the MIX2 series.
KNX blind controls: Position of the sun, sunlight and blinds which always respond correctly
The sun rises in the east and sets in the west – but in between and over the year, it shows a surprisingly variable course, which takes its different effects on houses, functional buildings, and the people, who live and work inside.
For some people it is quickly too warm, others are blinded by the incident sunlight. Those who want to create constant lighting and temperature conditions, and ensure an efficient working atmosphere, find exactly the right components in the KNX building automation from Theben, which counteract the complex interplay of sun position, azimuth, and elevation: sun protection with sun position tracking.
All this is very energy efficient: Because in winter, the solar energy is used to reduce heating costs, and in summer, the cooling effort is reduced by correct shading.
The temperature is 21 degrees Celsius, the wind speed is 7.5 kilometres per hour, it is very bright and there is no rain – in short: It is a beautiful sunny day. Data like these are sent by Meteodata 140 S GPS KNX to the Theben multifunction display VARIA 826 S KNX inside the individual rooms and to the MIX2 blinds actuators in the switch cabinet – and shading in accordance with the supplied GPS positioning is done.
Basically, it is all just a question of programming: What is the position of the facade in relation to the course of the sun? At which time of the day does the sun appear in the defined protection zone, and when does it leave it? And, how does it change its position in the course of the day and in the course of the year? The elevation shows the height of the sun, the azimuth shows the direction, from which the sunlight comes. The interplay of GPS weather station, multifunction display and KNX MIX2 blinds actuator reliably ensures that there are always pleasant lighting conditions on the sunny side of the facade – without dazzling. One should not forget the positive effect on climate control, since an accurate shading protects against overheating and reduces energy costs for cooling control. All this, of course with highest safety: Because during storm, ice, and frost, the blinds move up automatically.
The advantage of the Theben KNX solution: In contrast to other suppliers, the measured data are processed directly inside the weather station. An additional module is not necessary.
Benefits at a glance
1. Less components – reduced costs
- In contrast to most other suppliers, the processing of the measured data and sun position tracking takes place directly inside the KNX weather station Meteodata 140 S GPS KNX. An additional control module is not necessary.
- The weather station protects the awnings against frost, storm or rain, and moves them into a safe position.
- Passive houses with internal blinds benefit from blinds actuator JMG 4 T 24V: The 24V version is ideal for this type of application.
2. Adaptable
- Through the transparent housing of the KNX Meteodata weather station, the background colour of the facade shines through, so the weather station harmoniously blends with its surroundings.
3. Energy saving comfort
- The sun position tracking ensures very pleasant and glare-free working.
- The heating and cooling support contributes to reducing the energy consumption during each season.
Products for sun protection control with KNX
Slat adjustment
In case of high solar radiation, the position of the slats is automatically adjusted to the course of the sun. Dazzling and directly incident sunlight is thus avoided, without excluding the daylight completely.