GE RSTi-EP User Manual page 281

For error messages refer to the chapter, LED Indicators and Troubleshooting.
GFK-2958E
LED Indicators EP-3704
Module
Green: Communication over the system bus
Status Red: Module System Fault or Diagnostic Fault
1.1 Red: channel error
2.1 Red: channel error
3.1 Red: channel error
4.1 Red: channel error
EP-3704
Block Diagram EP-3704
RSTi-EP User Manual
Chapter 5 Detailed Descriptions of I/O Modules
277