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First time wiring a transformer

sigma25, sigma26, sigma24

First time wiring a transformer

Postby mhugh003 » August 26th, 2016, 6:05 pm

It's my first time wiring a transformer, so before I start connecting things I just want to get a second set of eyes on this.. (or direction on where to learn more about connecting transformers to AC line voltage)

I'll be connecting the Amveco 62021-P2S02 (2x9v 5va) to the Sigma25 board to power a Gamma2++

I have (what I believe is the correct connection for 115v) below using the diagram on the side of the transformer:

Image

Red/Yellow connected and Violet/Black connected on the primary side, then Green/Brown and Red/Blue connected on the secondary side.

Thanks in advance for any help/advise.
Mike
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Re: First time wiring a transformer

Postby amb » August 26th, 2016, 10:13 pm

Your transformer 's two primaries are connected in parallel, which is correct for USA and elsewhere with 115V/120V mains. 230V/240V based countries need to have the primaries connected in series.

Your two secondaries are also parallel connected. Whether this is correct depends on your transformer secondary voltage rating, and what DC output voltage you're trying to achieve. For the γ2 you need 5V DC, what's the specific model of transformer you're using?
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Re: First time wiring a transformer

Postby mhugh003 » August 26th, 2016, 10:25 pm

Sorry, should have included that..

It has 9v secondaries and a max load of 5va.

I'm looking to drop it to 5v with the sigma25 and sigma78 to power a gamma2.
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Re: First time wiring a transformer

Postby amb » August 26th, 2016, 10:28 pm

OK, then yes, the two 9V secondaries should be connected in parallel, and you got it right.
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