"If you use different PSU for hash boards and control board, please make sure to power the hash boards first and the control board only after the hash boards have been powered."
In any case Corsair 500 has only one already split PCie cord. Will it work?
You need to look more at the capsity of the 12V line than the raw wattage.
The PS needs at LEAST 30A for the hash boards alone ON ONE RAIL, preferably 35A for any safety margin, and AT LEAST 3 PCI-E connectors, not "split" unless 16AWG wiring is used.
Then add 5A if one PS is running both a hash board AND the controller board AND one more PCI-E connector (Fans will eat at least 4A alone).
The design of the hash boards makes it appear you MIGHT be able to get away with 2 per hash board, but DEFINITELY NOT SPLIT PCI-E if so unless 16AWG or better is used.
The S5 had that SAME warning about turn on order, just need to be sure the controller is on the last PS you turn on if you use multiple PS.
With only 2 PCI-E connectors I doubt that Corsair will work at ALL.
Probably a split-rail design with less than 30A on either rail.
Additionally, I doubt the wiring is heavy enough.
You want at least a Gold PS, not a Bronze. It's a noticeable efficiency loss that WILL cost you significant money.
The 40A rail is good.
The connectors look like a split pair, but I couldn't get the picture with the "better" view of the cabling to load. IF they are NOT split, it should work.