[CentOS] UPS question

so I have a bunch of servers at work that are on DUAL UPS's (1 per each 
of 2 power supplies).   Its mostly HP gear, but also some Sun and IBM.   
Ideally I'd like the system to not go into shutdown unless BOTH UPS's 
that a particular box is plugged into (there's actually 4 UPS, 2 per 
each of 2 racks).    Has anyone ever configured anything like that with 
NUT or whatever?

Right now, I'm running without any UPS monitoring software, as the whole 
building is on a generator that comes on 60 seconds after a power 
failure, so my 7kVA(!) UPS's don't see much use, and also I just 
installled these new racks and UPS's and haven't really had the time to 
sit down and figure it all out.


-- 
john r pierce                                      37N 122W
somewhere on the middle of the left coast