What can cause the 4-20mA signal to latch at 20mA on the ATV61 or Eflex drives?
Issue:
4- 20mA signal is stuck and will not clear on ATV61 or Eflex.
Product Line:
Altivar ATV61 Eflex
Environment:
All
Cause:
Noise issues
Resolution:
A voltage surge or spike on the mA input exceeding 7.9 V on this input will cause the analog input to jump to 20 mA and to stay there until power is cycled.
If the voltage surge/spike can't be eliminated by proper cable routing and shielding, or through the use of an isolator you can install a 6.8 V zener diode (available at most electronic stores) to prevent the excess voltage from reaching the AI2 input.
Put the cathode end (marked with a line) on the AI2 input, and the other end on the COM terminal.
4- 20mA signal is stuck and will not clear on ATV61 or Eflex.
Product Line:
Altivar ATV61 Eflex
Environment:
All
Cause:
Noise issues
Resolution:
A voltage surge or spike on the mA input exceeding 7.9 V on this input will cause the analog input to jump to 20 mA and to stay there until power is cycled.
If the voltage surge/spike can't be eliminated by proper cable routing and shielding, or through the use of an isolator you can install a 6.8 V zener diode (available at most electronic stores) to prevent the excess voltage from reaching the AI2 input.
Put the cathode end (marked with a line) on the AI2 input, and the other end on the COM terminal.
Released for: Schneider Electric Canada
Need help?
Product Selector
Quickly and easily find the right products and accessories for your applications.
Get a Quote
Start your sales inquiry online and en expert will connect with you.
Where to buy?
Easily find the nearest Schneider Electric distributor in your location.
Help Center
Find support resources for all your needs, in one place.