Internal Fault diagnostic
Safety Output Internal Module Fault Active
Allen-Bradley · Compact 5000 Digital I/O Modules
What does Internal Fault diagnostic mean?
This diagnostic indicates an internal fault within the safety output module itself, affecting one or more output points. It typically occurs in combination with an I.Ptxx.Fault tag, rendering the output data unreliable and requiring attention.
Common Causes
- An internal hardware or software issue within the Compact 5000 safety output module.
- Potential component failure or corrupted firmware within the module.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Cycle power to the module (power off, then power on).
- 2
If the 'Internal Fault diagnostic' persists after cycling power, replace the Compact 5000 safety output module.
Verified technical data. Last updated: March 2026
Related Faults
Source: Allen-Bradley Compact 5000 Digital I/O Modules