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Power supply commons
Posted: Sat Feb 20, 2021 7:51 am
by Craig
On one of the Centroid YouTube videos it say something like “Need to connect the commons of the power supplys.”
I have a Vfd, centroid power supply and this
Am I supposed to connect those 3?
Re: Power supply commons
Posted: Sat Feb 20, 2021 2:13 pm
by cncsnw
No. They are talking about the 0V (COM) outputs of the AC-to-DC switching power supplies.
What you have pictured is a transformer (AC-to-AC), which would only be used for contactor coils. It does not need a shared common with the DC supplies.
Re: Power supply commons
Posted: Sat Feb 20, 2021 8:54 pm
by Craig
cncsnw wrote: ↑Sat Feb 20, 2021 2:13 pm
No. They are talking about the 0V (COM) outputs of the AC-to-DC switching power supplies.
What you have pictured is a transformer (AC-to-AC), which would only be used for contactor coils. It does not need a shared common with the DC supplies.
My Vfd and centroid power supply are AC to DC, should those commons be connected?
Re: Power supply commons
Posted: Sat Feb 20, 2021 10:10 pm
by cncsnw
No.