Using PCNS to manage several redundant power supply servers

[BillP]

I looked over the APC white papers and notes regarding dual corded servers as well as having redundant UPS units, but wasn't sure how those configurations would transfer over to the following:

!http://i.imgur.com/eXELh.jpg!

I'm not sure if shutdown timings are also available with a setup like this, but here's what I was planning:

For shutdown:
1. Power goes out on all 3 circuits
2. VM's are sent a message to shutdown gracefully.
3. Once the VM's are off, shutdown the SAN and the fiber switch.
4. The DNS server needs to be shutdown last.

For powering up
1. DNS server is booted
2. Fiber and SAN are booted
3. SRV1 and SRV2 are booted along with their VMs

If this type of setup isn't available, how should I redesign my layout to ensure the best possible redundancy and control?

Thanks,
Chris