Power Supply's Disconnecting DC ground on an ASTEC AA23260 PSU

[Bikser]

Hello

I have two ASTEC AA23260 server power supplies that I like to serially connect to get a 24v 1200w PSU. I want to disconnect the DC ground on one of them as shown by coolgabsi and Tony on there HP DPS-600PB setups but so far I haven't successfully worked it out. Have anyone here modified an ASTEC AA23260 for this purpose and would you be willing to share you experience?

Right now I'm at the point where I don't know if these PSUs have a DC ground at all. I thought that the DC ground was wired from the DC minus pole and too the case. But I can't find any thing on the DC board that is making a connectivity to the case except for the board screws. But the board screws makes no connectivity to any of the board components from what I can find.
For reference: Do an unmodified DPS-600PB PSU make connectivity between it's DC minus pole and the case or am I looking at it the wrong way?

 

[Bikser]

Charger bag

After some research I came to the conclusion that thees PSUs are not grounded on the DC side so I just hooked them up together and it all worked like a charm. Here is the result. I tried to keep it simple but with a high functionality as well. There's still some space up to the left on the lid that I haven't figured out what to do with yet.

I'd like to thank everyone who put up videos, pictures and information of there work. It was to a huge help! Thanks!

 

[Tony]

To check DC ground, just put a lead on the negative terminal and check for continuity on the case. If you get continuity, then there is a DC ground. If not, then there is not.

 

[Bikser]

 

[Lee]

Sweet build mate.
I will be building mine when i get back to Spain next week.

 

[Graham Lawrie]

Very nice build

 

[Bikser]

Thanks guys! It was fun to put it together. I haven't really tested it yet but summer seems to be around the corner early this year.

Good luck with your build Lee. Looks like you got a real beast of a psu to work with.
Graham, yours looks good to. I like that you can turn the psus off with switches. I looked at that as well but these psus still have there fans running when the start up pins are disconnected so I never bothered with it. I'll maybe look at again later on.