u/Extension-Water2665

Hello everyone,

For my college senior capstone project I need to design and assemble a control panel.

The control panel will take in 120VAC. In addition there is a 24VDC PSU and 75VDC PSU that are powered from the 120VAC source.

For the commons(0 VDC) on both DC power supplies should I connect those to the Protective Earth of the 120VAC source? I was planning on using terminal blocks to connect them. I have seen mixed methods online so i was curious on how I should do it.

Thank you for the help!!

Update:

I forgot to mention this but the 75VDC will power stepper two stepper motors. I may go 75VDC connected to PE and floating for standard 24VDC that way the noise from the stepper motors is isolated from the 24VDC common. Thoughts on that?