LED display is divided to two functional sections, independent from each other, which are not galvanically connected with each other.First section of the display consists of measuring module, which has 4 measuring inputs. As a standard two from four measuring inputs are adapted for cooperation with measuring elements and the results is displayed in digital version, while two remaining inputs are operating in standard 0 ÷ 10V with extension to alternating voltage with frequency 50/60Hz and the result is presented as indication of bar graph.The second section of the display consists of 22 signalling diodes LED. Signalling is carried out by putting a voltage, within the range of allowable supply voltages for the devices, to appropriate inputs
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