Group Indicator Flashing Red and Yellow

Faults Present in Displayed Group Channels

Allen-Bradley · Compact 5000 Digital I/O Modules

What does Group Indicator Flashing Red and Yellow mean?

The Group A or Group B indicator is flashing red and yellow, indicating that I/O status is currently displayed for that group of channels and at least one fault condition exists within those channels. This visually alerts the technician to a fault within the active group.

Common Causes

  • One or more individual I/O channels within the actively displayed group (Group A or Group B) have an active fault condition.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure the correct group (Group A or Group B) is actively displayed by verifying the indicator is flashing red and yellow.

  2. 2

    Examine the individual channel I/O status indicators (if available on the module faceplate) for specific fault indications within that group.

  3. 3

    Access the module's diagnostic information in Studio 5000 Logix Designer to pinpoint the specific channel faults within the group.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Allen-Bradley Compact 5000 Digital I/O Modules