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What would cause the ATV340 drive to trip on STO and not run?

Published date: 21 March 2019

Issue:
What would cause the ATV340 drive to trip on STO and not run?

Product Line:
ATV340 drive

Environment:
All 

Cause:
STO Inputs are open.

Resolution:
The STOA or STOB is not getting the 24vdc input.  Check the wiring at the top of the drive. 
 

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