If I'm following you correctly you are suggesting that the 24V power supplies are interconnected. I have not seen that for some time. What Class power supply are you working with? I would check 725.41 (B) Interconnection of Power Sources. Class 2 or Class 3 power sources shall not have the output connections paralleled or otherwise interconnected unless listed for such interconnection.
In my experience parallel systems are unreliable and subject to failure also as mentioned by previous posts.
