9. easyE4 inside9.4 Time behavior of the inputs and outputs9.4.2 Delay time on EASY-E4-UC-... devicesWith AC inputs the easyE4 device scans the input signal in long or short scan cyclestSC1 depending on whether DEBOUNCE is activated/deactivated. The scan cycle alsodepends on the frequency of the supply network.9.4.2.1 Delay time with DEBOUNCE activatedIf the DEBOUNCE function is activated, the easyE4 device checks whether a positivehalf-wave is present at an input terminal during two successive scan cycles tSC1 (1stand 2nd scan pulse at A). If the easyE4 device registers two positive half waves in suc-cession, it switches the appropriate input (contact) internally from 0 to 1.Figure 241: Delay times for evaluating an AC input signal and an activated DEBOUNCEThe typical input delay caused by the DEBOUNCE is therefore at least 80 ms. The cycletime must be added to this since an easyE4 does not transfer the signal into the circuitdiagram until the start of a cycle. Conversely, the input is switched off if the easyE4device does not detect any half-cycles twice in succession (1st and 2nd pulse at B).tSC1 (50 Hz) = 40 ms, tSC (60 Hz) = 33.3 msl Switch-on delay (normally):l I1…I12: 80 ms (66.7)l Off-delay (normally):l I1…I12: 80 ms (66.7)The corresponding values for 60 Hz are given in brackets.easyE4 11/18 MN050009 EN www.eaton.com 509
