Thanks! What happen if you close the PSU who power the blade that power the controller? My guess is that all blades in that miner will stop hashing. But do you need to close the PSU that power the other blade?
IMO you should probably power on the controller side last since it may need to see the other board when it comes up. I don't think it would matter when shutting down though so long as you are shutting the entire unit down.