Module Critical Temperature
Allen-Bradley · Compact 5000 Digital I/O Modules
What does CriticalTemperature mean?
This diagnostic indicates that the module is above its critical temperature limit, representing a more severe thermal condition than 'OverTemperature'. This condition can lead to immediate shutdown, module malfunction, and 'Uncertain' data quality, with a high risk of permanent damage. The tag automatically resets to 0 when the condition is removed.
Common Causes
- Extreme ambient temperature conditions, significantly exceeding the module's operating limits
- Complete failure of the enclosure's cooling system (e.g., fans, air conditioning)
- Prolonged operation under severe overload conditions, leading to rapid heat buildup
Repair Steps & Checklist
Click steps to track your progress.
- 1
Immediately reduce the ambient temperature around the module or safely shut down the affected system to prevent permanent damage.
- 2
Verify the functionality of all cooling systems (fans, air conditioning) for the enclosure.
- 3
Allow the module to cool down completely to a normal operating temperature before attempting to restart or re-enable the system.