5

Plausibility Error in Sensor Circuit 1 or 2 (External/Internal)

Phoenix Contact · ib il safe 2-eco

What does 5 mean?

This fault signifies a plausibility error in either sensor circuit 1 or 2 (external error), or that internal diagnostics are active (internal error). This state is observed when sensor circuits 1 and 2 are active and the segment circuit is open. Such an error indicates a potential inconsistency in sensor input logic or an internal device issue that could affect safety functions.

Common Causes

  • External plausibility error detected in sensor circuit 1 or sensor circuit 2
  • Internal diagnostics active, indicating an internal device issue

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    For external errors: Check the affected sensor circuit (either 1 or 2) for proper operation and signal integrity

Browse all codes in this manual (8)
Verified technical data. Last updated: March 2026

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Source: Phoenix Contact ib il safe 2-eco