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ErrorLib — Industrial Fault Code Library

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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. 1

    Cycle power to the module (power off, then power on).

  2. 2

    If the 'Internal Fault diagnostic' persists after cycling power, replace the Compact 5000 safety output module.

Browse all codes in this manual (38)
Verified technical data. Last updated: April 2026

Related Faults

CIPSyncTimeoutCIP Sync Master TimeoutConnectionFaultedOwner-Controller Connection FaultCriticalTemperatureModule Critical Temperature
Source: Allen-Bradley Compact 5000 Digital I/O Modules
Open Manual (Page 63)Search more codes in this manual