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Daisy Chain PSU

Started by Oxytousc, November 21, 2022, 06:39:14 AM

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Is it a no-no to daisy chain power supplies? I'm planning to put a 5v supply in with my falcon f16v4 to run the second bank of ports at 5v. It's a Ready to Run controller so I didn't wire it up to begin with, so figured I'd ask. 

My plan is to stack the 5v ontop of the 12v, and I wasn't sure if I needed to run a second 110 plug in or if I could just take off the ground and hot and neutral from the first PSU to the second. 
San Gabriel, CA


I do that all the time in my controller boxes, but I use 12v everywhere except for my P10 panels.
Jim Nealand
Kennesaw, GA all Falcon controllers, all 12v Master Remote Multisync with Pi and BBB P10 and P5


Thanks. Yea, I don't think it should matter, since the hot side is all 110v house power. The regulated output is the only difference.
San Gabriel, CA


The only way you would need to run a second 110V line from your house would be if your PSU's are consuming more amps than the power cord or outlets allow.  Most typically in the USA, this will be 15A or 20A... which you almost certainly will not be doing.

Assuming this is correct... you can run a single 110V power supply to your enclosure.  Once inside of the control box, you should have some terminal strips that the 110V line screws down into.  From there, you can run separate lines to the Line In/Input side of your PSU.

You can also put a breaker switch inside your control box which makes for easier turning the unit on/off (I use my switch all the time).  

I don't think you were asking, but just to be clear, do NOT daisy chain the output 5V/12V side of the PSU... run one to each side of the F16v4.  

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