The wiring diagram of course also supports 24V power supply units (in the extra-low voltage tree) and LED controllers (either in the extra-low voltage tree, e.g. for DALI controllers) or in the KNX tree (for KNX LED controllers).
Power supply units can of course also be used for many other things, for example
- to feed auxiliary voltage to the “outside” via a terminal block
- as voltage for a contact that is measured via a “normal” binary input.
- as auxiliary voltage can be selected for some KNX components.
In the following example, we will use it as a voltage source for an LED strip.
The basis of our configuration is a power supply unit, behind which we place a back-up fuse for the secondary voltage, then connect the whole thing to a terminal block. The power supply unit itself is connected to the 230/400V mains supply via a protection device.
We will also create a KNX LED controller in the KNX section. If the LED controller itself has inputs for the 24V supply, this can be assigned at this point. In this example, select the microfuse, which we have created separately.
Tip: a DALI LED controller should be placed directly under the desired power supply unit (or protection device). A dedicated assignment to the power supply unit via a selection field is then no longer necessary.
Last but not least, we assign the channels of our controller to the terminal block again: 
Tip: some LED controllers (e.g. EldoLED Lineardrive) connect the “+” of the power supply unit directly to the LEDs, only the GND is looped via the controller. The assignment of the “+” channel of the controller can then be omitted.
The result is displayed in the wiring diagram as follows:
