7.1.1Indicators and Controls IM 300-3:I/O Module Failure LEDThis LED lights up if the supply of power to the connected EUs hasfailed and/or the connecting cable is open-circuit.IM 300-5 (-5CA11):I/O Module Failure LEDsLEDs LD1 and/or LD2 light up if a module inserted in the EU nolonger responds to an access by the CPU.The IM 312 has no indicators or controls.5034 1833 171IM 312Fault5034 1833 17150 33 1734 18 1IM 300-5FaultI/O ModuleFault5034 1833 171IM 300-3FailureI/O ModuleFailureFigure 7-1 Front Plates of the IM 300 and IM 312The 300 and 312 Interface ModulesSystem Manual7 - 6 C79000-B8576-C199-03
