The input wiring or device is suspected as being the source of a PLC problem. If this circuit is not at fault, then the status indicator on the input module should be illuminated when the input device...

The input wiring or device is suspected as being the source of a PLC problem. If this circuit is not at fault, then the status indicator on the input module should be illuminated when the input device is a) closed and programmed for an XIC condition. b) open and programmed for an XIO condition. c) closed, regardless of how it is programmed. d) open, regardless of how it is programmed.