I posted awhile back that my server would run for about 20 minutes and then crash, with alternating blue and red health lights. This pattern didn't match any of the light patterns that I found in the manuals, but it "seemed" like a power supply problem to me. I just installed a power supply that I purchased from Ebay (with wires already done correctly for the EX-485 server). It has been running for 24 hours, so I think the problem is resolved.

Just wanted to pass this on in case someone else has the same problem.