50
Analog Input Current Below 4mA
Vacon · NX All-in-One Application
What does 50 mean?
The analog input configured for a 4-20 mA signal range is receiving a current signal below 4mA. This suggests a problem in the current loop, such as a broken or loose control cable, or a failure of the signal source itself, preventing accurate control or feedback.
Common Causes
- Analog input module failure or incorrect wiring for current loop (e.g., P1-02).
- Sensor malfunction reporting a current below the minimum threshold (e.g., 4mA).
- Open circuit in the analog input loop.
- Faulty analog input card or module.
- Incorrect parameter setting for analog input range (e.g., P1-04).
Repair Steps & Checklist
Click steps to track your progress.
- 1
Inspect the entire 4-20 mA current loop circuitry, including the signal source, wiring, and input terminals on the drive, for breaks, loose connections, or component failures.
Verified technical data. Last updated: March 2026
Related Faults
Source: Vacon NX All-in-One Application