Ukudluliselwa kweVoltalis echelon pcbA voltalis kuklanyelwe ukulawula okwamanje kusekethe.Ngokuvamile zisetshenziselwa ukuvula nokuvala izinto zikagesi, njengezibani, izinjini, njll. Ama-relay axhunywe ebhodini lesekethe eliphrintiwe (PCB) futhi asetshenziselwa ukulawula ukugeleza kwamanje.I-PCB inezingxenye eziningana, njengezihluthulelo, ama-capacitor, ama-transistors, ama-diode, nezinye izingxenye ze-electronic.I-voltalis edluliselwe ixhunywe ku-PCB ngesethi yezikhonkwane ezixhunywe ezingxenyeni ezihlukene ze-relay yesifunda bese isetshenziselwa ukulawula ukugeleza kwamanje ngokushintsha izikhonkwane zivuleke noma zivaliwe.