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Can you use an external +24V on the ATV58 to power up the control board?

Issue:
Can you use an external +24V on the ATV58 to power up the control board?

 Product Line:
Altivar 58

Environment:
 All models and serial numbers

Cause:
 None

Resolution:
An external +24V power cannot be used to power on the control board of an ATV58 drive.  The ATV58 generates its own +24v from the line voltage for use with the control circuits. 

An external power +24v power supply can be used instead of the internal to control the drive (not power it up) if the common external supply is tied to the COM terminal.  The external +24 and internal +24 must be isolated.    

 

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