3.3.8 LED status displayTable 7: Status display and its meaningLED Description Colour LED = OFF LED = ON LED flashesInputs 0… 15Digital input Yellow Input = OFF Input = ON (the inputvoltage is displayedeven if the supplyvoltage is OFF).--Channel error Red No channel error Channel error --UP Process voltage+24 V DC viaterminalGreen Process supplyvoltage is missingProcess supplyvoltage OK--PWR +3.3 V voltagefrom IO-BusGreen +3.3 V IO-Busvoltage is not avail-able+3.3 V IO-Busvoltage is available--ERR1 Module errorindicator 1Red No module error Module error whichleads to a SAFESTOP stateModule passivationand/or acknowl-edgement request(alternating blinking)ERR2 Module errorindicator 2Red3.3.9 Technical dataNOTICE!DI581-S-XC version is available for usage in extreme environmental conditions (Ä Appendix “Systemdata for AC500-S-XC” on page 446).AC500-S Safety ModulesDI581-S digital safety input module > Technical data30.03.2017AC500-S98
