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Author Topic: Ganging 2- 12 volt power supplies  (Read 1251 times)

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Hugh

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Ganging 2- 12 volt power supplies
« on: December 13, 2008, 06:37:24 PM »
Is it possible to combine 2 12 volt DC transformers in series to power a bank of 24 volt DC, PC fans. These are items I have laying around & would save the cost of buying new.


  The fans are 12V dc .25 amps, eight in total. The power supplies are 110 input 12 volt dc output @ 1.5 amps each. IF so would it just be a mater of splicing the output of both and hooking them up to the fans that would be hooked up in series.

« Last Edit: December 13, 2008, 06:37:24 PM by (unknown) »
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Flux

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Re: Ganging 2- 12 volt power supplies
« Reply #1 on: December 13, 2008, 11:54:30 AM »
I assume you mean the fans are 24v .25A if they are 12v there is no issue.


Yes you can connect the 2 power supplies in series on the dc side to get 24v. keep the mains sides in parallel.


If your figures are correct and you have 8 fans at .25A that comes to 2A. your power supplies are rated at 1.5A so you will not be able to run all 8 fans if they take the claimed .25A


Flux

« Last Edit: December 13, 2008, 11:54:30 AM by (unknown) »
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Hugh

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Re: Ganging 2- 12 volt power supplies
« Reply #2 on: December 15, 2008, 06:25:14 AM »
Thanks Flux & yes the fans are 24V & .25 Amps  I assumed only 6 could be used


Hugh

« Last Edit: December 15, 2008, 06:25:14 AM by (unknown) »
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cyplesma

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Re: Ganging 2- 12 volt power supplies
« Reply #3 on: December 17, 2008, 05:36:26 PM »
I would keep a very close eye on the power supply overheating if your going to run 6 of those fans.


personally I would run just 5 fans.


8 )

« Last Edit: December 17, 2008, 05:36:26 PM by (unknown) »
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