Internal Terminal Temperature Too High
Beckhoff · EL2904 TwinSAFE Fail-Safe Output Terminal
What does Diag 2 Flash 8 mean?
The internal temperature of the terminal has exceeded its specified operating range, indicating overtemperature for internal microcontrollers (μC1 or μC2). This can lead to reduced performance, component degradation, thermal shutdown, or even complete failure of the terminal, compromising safety. Prompt resolution is required to prevent permanent damage.
Complete Troubleshooting Guide
- 1
Ensure the ambient temperature in the control cabinet is within the specified operating range to prevent overheating.
- 2
Verify proper ventilation and air circulation around the terminal within the enclosure, clearing any obstructions to airflow.
- 3
Check for excessive load on the terminal's outputs or other nearby components that might be generating additional heat.
- 4
Take suitable EMC measures if electromagnetic interference is suspected to be contributing to internal heating. If the issue persists, replace the terminal.