Applicatio Manual
Universal Interface 4 DIN/NTC EK- CG2-TP
Revisione 1.0.0 - Aggiornato: 04/09/2017
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Pag. 14
6.5.2 Funzioni logiche
The KNX pushbutton allows to use some useful logic functions (AND, OR, NOT and exclusive OR) in order to
implement complex functions in the building automation system.
You can configure:
•
4 channels of logical functions
•
4 inputs for each channel
Each object value, if desired, can be individually inverted by inserting a NOT logic operator.
The inputs created by the objects are then logically combined as shown in the following figure:
Figure 4 – Logic combination function
The logic block on the right side of the figure has the following function, based on the selected operation:
OR – the output is ON if at least one input is ON;
AND – the output is ON if all inputs are ON;
XOR – the output is ON if an odd number of inputs is ON;
This last function is more intuitive when there are only 2 inputs: in this case, the output is ON when one input or
the other one is ON, but not the two of them simultaneously.
Please note that in this description, with “input” and “output” we refer only to the logic block; for the device
operation, the effective “inputs” are given by communication objects, so also the possible activation of NOT logic
operators has to be considered.
The following figures show the basic logic functions, assuming 2 inputs and only one logic communication object: