Floating or Grounded power supplies

[spillage]

I’ve read a good amount of pros and cons on the subject, but was wondering what general consensus is here about best practice with an AXBBE.

[spillage]

This article sums up what I’ve read elsewhere.
https://control.com/technical-articles/ ... er-supply/

@CNCDrives what is the official guidance on grounding negative of DC power supplies connected to an AXBB-E?

[cncdrive]

Ino ur installations we never grounded the negative of the DC powersupply.
Furthermore there are 2 powersupplies, one 5V and one 24V, if you ground both then you bypassing the optoisolators which is not good.
So, even if you ground a powersupply DC rail you should do it with only one of them.
But again, it is unnessessary in my opinion and we never did it in our installations.

[spillage]

Thank you for the reply and reasoning.
Your time is greatly appreciated.