Hello,
Do DeltaV enclosures with AC and DC power sources need separate grounds for each source? In my setup, the AC source powers two power supplies - both are grounded to the enclosure on their AC side. The two two-wide carries along with three industrial network switches are grounded to the backplane of the enclosure. Is that common?
I have seen the DeltaV controls grounded to isolated ground bars - an earth rail mounted via two plastic bushings to the backplane. Does the isolated ground bar need to be grounded, too? If yes, do the DC ground bars have same reference as AC?
In reply to Rune Reppenhagen:
In reply to SimHogan:
In reply to dmitriy sagadiev:
The document number is D800118X022 and it was just revised in April 2018. See image below for Guardian guidance:
Regards,
Rune