WAGO-I/O-SYSTEM 750 Device Description 21750-464 2/4 AI RTD configurableManualVersion 1.0.1Pos : 34 /All e Seri en (Allgemei ne Module)/Ü berschriften für alle Serien/Gerätebesc hreibung/Anz eigeel emente - Übersc hrift 2 @ 4\mod_1240984390875_21.doc x @ 31964 @ 2 @ 13.3 Display ElementsPos : 35 /Serie 750 ( WAGO-I/O-SYST EM)/Ger ätebesc hrei bung/Anz eigeelemente/Anal ogei ngangs klemmen/Anz eigeel emente 750- 0464 @ 6\mod_1264150788609_21.doc x @ 48344 @ @ 1Table 9: Display elementsFigure 7: DisplayelementsLED Channel Desig-nation State FunctionA 1 StatusR 1offNot ready for operation or no ordisturbed internal buscommunication (when Watchdogtimer enabled only, see section"Parameterization")green Operational readiness and trouble-free internal data bus communicationB 2 StatusR 2offNot ready for operation or no ordisturbed internal buscommunication (when Watchdogtimer enabled only, see section"Parameterization")green Operational readiness and trouble-free internal data bus communicationC 1 ErrorR 1off Normal operationredOverrange/underrange of theadmissible measuring range *) , brokenwire, short circuit*)D 2 ErrorR 2off Normal operationredOverrange/underrange of theadmissible measuring range *) , brokenwire, short circuit*)E 3 StatusR 3offNot ready for operation or no ordisturbed internal buscommunication (when Watchdogtimer enabled only, see section"Parameterization")green Operational readiness and trouble-free internal data bus communicationF 4 StatusR 4offNot ready for operation or no ordisturbed internal buscommunication (when Watchdogtimer enabled only, see section"Parameterization")green Operational readiness and trouble-free internal data bus communicationG 3 ErrorR 3off Normal operationredOverrange/underrange of theadmissible measuring range *) , brokenwire, short circuit*)H 4 ErrorR 4off Normal operationredOverrange/underrange of theadmissible measuring range *) , brokenwire, short circuit*)*) Depending on the hardware, it is not possible to distinguish between arange underrange and a wire break when using NTC version 750-464/020-000. In the case of wire break, a range underrange is always detected anddisplayed.Pos : 36 /All e Seri en (Allgemei ne Module)/Ü berschriften für alle Serien/Gerätebesc hreibung/Bedienel emente - Ü berschrift 2 @ 4\mod_1239191655456_21.doc x @ 30439 @ 2 @ 1