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How can you keep the Ethernet Ports active on the ATV340E, ATV630 and ATV930 Process drives when the mains input is turned off?

Issue:
How can you keep the ethernet ports active on the ATV340...E, ATV630 and ATV930 Process drives when the mains input is turned off?

Product Line:
ATV630, ATV930 and ATV340 with Ethernet option

Environment:
All 

Cause:
The Main control board needs external 24vdc to power up the Ethernet ports when the drive is powered down. 

Resolution:
External 24V dc supply (v.good quality, stable, no voltage dips) is necessary to supply the control block or control board to keep the ethernet ports active when there is no mains voltage on the drive.
 
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