800 Series Discrete I/O Modules, System Interface

Interface Overview

When used with a PLC in a remote configuration, the appropriate RIO Adapter module or RIO Adapter module with ASCII, must be present in the I/O rack. (See instructions shipped with the adapter modules.)

Indicators

The applicable indicators on the front of the module shows the status as listed below.

Indicator	Color	Meaning When ON or Blinking
Active	Green	The module has passed its power diagnostics without error—it remains on until background diagnostics detect an error condition, loss of internal voltage, or loss of communication with PLC)
Discrete I/O	Red	Power is available at the output of the module for use by field devices
Blown Fuse	Red	A fuse is blown
Over Range	Red	One or more inputs have exceeded the valid input range
Under Range	Red	One or more inputs have dropped below the valid input range
Field Power	Red	Acceptable field power is being supplied.

NOTE: The active indicator does not represent the condition of the I/O points. The indicator may be lit with one or more of the I/O points not working properly.