Cross-Cabling UPS's on Multiple Rack Towers?

[Anonymous user]

I have two EMC SAN towers, each of which is powered by a Smart UPS SUA5000RMT5U. Each of the UPS's has two 208V power outlets plugged into a SAN tower, which has two parallel power inputs. If one of the power inputs is unplugged, the SAN continues to work on the power supplied by the other side.

My question is if I can provide some redundancy against a UPS failure (which happened a couple of weeks ago) by plugging one output from each UPS into one of the SAN tower inputs, and the other from the UPS into one of the other SAN inputs. If we do this with two SAN towers, we wind up with both UPS providing one power input to each SAN, so they are cross-wired. Since the SAN towers can still run with only one input line, this should give us protection in case one of the UPS's went down; the other would still provide power to both SAN's.

Is this a reasonable configuration, if the total load for both SAN's is within the capacity of a single UPS? Thanks for any replies.