Who does not know this: when you sleep at night in the dark, drunk drunk from the bedroom into the bathroom and turn on the light, the three halogen lamps dazzle so much that your eyes hurt.
Retrofitting based on EnOcean and myHomeControl
There is also a manual dimmer helps a little, because at the decisive moment, Murphy's Law is the wrong dimming value set. In fact, an "intelligent house" should look after a comfortably dampened light.
This is how the logic works
We go from a "normal" bathroom installation with light switches in the hallway and halogen ceiling radiators in the bathroom.
Conclusion and Outlook
The task is: After 10 pm, the light in the bathroom should be dimmed to 30 percent, from 6:30 am to 100 percent when it is switched on. Since no new cables are to be laid, we are using the cable- and battery-powered EnOcean wireless technology (ISO / IEC 14543-3-10) for our project.
A flush-mounted dimmer FUD61NPN from Eltako is used. This is a universal dimmer switch for all types of illuminants, including 230 volt LED and dimmable energy saving lamps.
This dimmer switch is installed in the installation box instead of the light switch and assumes that the conductor and neutral conductor are present in the socket. If the neutral is missing, the Eltako dimmer FUD61NP can be used instead.
However, dimmers can not be used to dimmer energy-saving lamps. In the bathroom the use of energy saving lamps is not useful anyway: they are best used where you expect long lighting times.
The connection is not a difficult matter, but for security reasons (because of the high voltage of 230 Volt) it can only be carried out by a specialist. The conductors "L" (black) and neutral "N" (blue) are connected to the module with screw terminals.
The switched cable to the luminaire is attached to the appropriate terminal. Then it goes to teach into the myHomeControl system. This procedure is described in detail in the instruction leaflet and completed in 30 seconds. Now the module can be sunk in the installation box.
The light should still be switched on and off by means of a light switch. This task could also be carried out by a motion detector or magnetic contact at the bathroom door. In our example, however, we use manual operation.
In place of our conventional light switch, we use the EnOcean button: ie directly to the socket with the dimming module. In principle, any EnOcean button can be used. Meanwhile, suitable inserts or switches are also available for the established switch series of the well-known manufacturers such as Jung and Gira. So you can stay true to your design line.
In our example, we use the Eltako radio surface switch FT4F. This is supplied with single and double rocker and can be mounted accordingly. For the control of a lamp group in the bathroom, the single rocker is sufficient.
The task is called
We use the myHomeControl system, which is known from many projects, to describe the logic behind the task. The software can be downloaded free of charge from the web for test purposes. The screen photo shows all the logic.
PTM250 is the name of the EnOcean button, our light switch, with a rocker. Underneath is the timer. The setting is shown in the figure. Both modules, timers and pushbuttons, send their signals to the filter and the setpoint transmitter.
These are software functions of myHomeControl, which we have previously dragged onto the workspace using the right mouse button.
MyHomeControl offers a wealth of pre-built functions and EnOcean elements for direct use. The filter relays both the ON and OFF commands without delay. However, the Enable check box is selected. This means that the forwarding is dependent on a status signal at the Pin activation.
The output of the filter is connected to the input of the dimmer. In our example, we have also introduced a second dimmer model - PEHA 451 FU-BEP - in which the logic functions exactly the opposite way. Of course, you only need one of the two dimmers.
The timer activates the filter. It transmits its own. Off signals also to the activation input of the setpoint value, but inverted. If the filter is activated, the setpoint generator is automatically blocked.
A blocked setpoint transmitter receives the on command from the button, but can not send its default value to the dimmer. This uses its default value: in this case 100 percent.
If the clock switches at 22:00, the setpoint is released and the filter is blocked. The setpoint transmitter now sends its default of 30 percent to the dimmer when the button is pressed.
When using a touch screen for visualization, myHomeControl offers a special feature: touching the luminaire symbol longer, a window appears and provides a slide controller, which can be used to adjust the dimming value by finger tipping. So it is not necessary to change to the programming level for the change.
Simple tasks seem to turn out to be tricky, if one wants to realize them. The solution presented here is the basis for a number of other tasks at home and in the office.
Unfortunately, despite the ISO standard, some manufacturers are launching EnOcean components that work just as well as competitors, but vice versa. This can confuse the user unnecessarily.
When retrofitting conventional switches to EnOcean radioactors, the problem that no neutral conductor is present in the socket is very often encountered. The neutral dimmer from Eltako is therefore very interesting.
In principle, any other sensor can be used instead of the light sensor. Motion detectors or door contacts appear sensible. The timer can be replaced, for example, with a brightness indicator or the sunrise / sunset clock.
Switch off the light with push button, switch off the light with push button, brightness from 22:00 h: 30 percent, from 06:30 h: 100 percent, times and percentages should be easy to adjust, differences may be possible depending on the day, for example weekend / Weekday
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