H500 Chassis Power Redundancy

I am looking for documentation about power supply redundancy in the H500 nodes in our chassis. Our chassis has 4 H500 nodes each with a single power supply. We have 2 PDUs in the rack, each on it's own circuit. Nodes 1 and 3 are on PDU A and nodes 2 and 4 are on PDU B. What happens if PDU B loses power?

I assume that power from node 1 would keep node 2 up and node 3 would keep node 4 up. Is that really what happens? Our maintenance department is reworking some power in the data center and they will need to take one PDU down to change circuits. I need to make sure that we do not have an outage while they work on the power.