cpl switching psu q's

[daArry]

Hey,

I've picked up a surplus switching psu which I'd thought be ideal for the midibox bits in the big controller project i'm planning, built around that banged-up yamaha mc2404 i picked up...

It's specs are:

100-240v AC in, out +5v,+12v DC at 8 amps

more than enough juice - +5V for digital logic (for relay's power controlling analog switching too perhaps?). +12V for motorfaders...

First up - i'm hoping it's fine to just chain the sep psu's i'm using within the same box to a single power switch/IEC input socket and i'll just make sure I use some beefy cable when connecting to mains externally...

I'll keep the exsisting mc2404 psu (for the new analog bits) and change the ceramic smoothing caps to some poly's...any other ideas there?

Back to this switcher tho - I can't see any jumpers anywhere to set input voltage so I'm wondering if it's ok to just feed it uk 220 mains and it'd be coo or not...i took a cpl pics anyway:

The wires to the left there are the dc outs. Yellow marked 'P.UK', red '+5V', blue '+12V' and black/green are dc gnd.

Here there's a pre-wired cable which is on the same tracks as the rectifiers + and - outputs...

Any pointers appreciated! :thumb:

 

[Svart]

hmm I do a lot of work with swtichers, if the spec says that it will do 100-240 it should be an autoswitcher meaning it will change modes depending on it's AC input voltage. do you have a model # for it? usually it will have a switch or another header for the voltage selection if it's not an autoswitcher.

I'm not sure what purpose the extra cable you have in the second picture is for..

also the labeling on the first picture's inputs doesn't seem correct. I assume you looked at the traces too, but that ground will be an earth ground, the one to the cap will be a neutral and the other of course is mains input. the one that goes to the cap, does it also go somewhere else?

 

[daArry]

coo, i'll hold hope it's an auto-switcher then...

do you have a model # for it?

The sticker on that main big filter cap there has 'Power Switch Corp PVI-150-39-PRV' on it.

also the labeling on the first picture's inputs doesn't seem correct. I assume you looked at the traces too, but that ground will be an earth ground, the one to the cap will be a neutral and the other of course is mains input. the one that goes to the cap, does it also go somewhere else?

I looked at the traces ye, just wondered if best to leave dc gnd unconnected from earth/chassis. The big cap is just for ac line conditioning I assumed - the pin does go on to the transformer and another lil cap too...

cheers

 

[Svart]

yeah it's transient suppression and the like. don't worry about the ground, go ahead and hook it up, if the PS is properly designed it will be fine.

:thumb: