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ErrorLib — Industrial Fault Code Library

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MOD Indicator Off

Module Power Not Applied

Allen-Bradley · Compact 5000 Digital I/O Modules

What does MOD Indicator Off mean?

The Module Status Indicator (MOD) is off, indicating that power is not supplied to the Compact 5000 digital I/O module or the module is not properly installed. The module is not operational in this state.

Common Causes

  • System power supply to the module is off, interrupted, or below minimum operating voltage.
  • The module is not correctly seated in the backplane connector.
  • Backplane communication or power bus issue.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Confirm that the system providing power to the module is energized and stable (e.g., check controller power supply indicators).

  2. 2

    Physically verify the Compact 5000 module is correctly installed and fully seated in its backplane slot.

  3. 3

    Check the backplane connector for any damage or debris that might prevent proper power delivery or communication.

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 114)Search more codes in this manual