Managed UPS on OpenBSD

[Floor Terra]

Hi,

I'm searching the internet for a Managed UPS for my OpenBSD server.  
My main concern is protecting the server from damage caused by sudden  
power-outages. If the power is gone, the server should have enough  
time to shut down and power off. It's one server so I wont need a big  
UPS.
The problem is: I have no experience with UPS and I can't find decent  
documentation on UPS on OpenBSD. The UPS I found is the "APC BackUPS  
CS 500 USB/Serial", but on the nut website I can't find if it is  
supported. They support at least partially one APC protocol, but no  
information on specific models.

Which UPS are known to work on OpenBSD and what software do I use to  
manage it.


Floor Terra