Re: Power supplies

["Dave McLaughlin" <dave@xxxxxxx>]

NO NO NO.. Keep the AC gnd isolated. GND in my drawing is the OUTPUT power
supply GND, often called common, negative or 0V so can often be very
confusing.

For my drawing, use the term 0V instead and this will make it much clearer.

Dave...

----- Original Message -----
From: "Paul" <groups@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, May 22, 2003 3:25 PM
Subject: RE: [ukha_d] Power supplies


Should chassis GND, AC GND and this new PSU 0V be connected together? Or
should AC and chassis GND be kept separate from 0V on the PSU?

Paul.

> -----Original Message-----
> From: Dave McLaughlin [mailto:dave@xxxxxxx]
> Sent: 22 May 2003 15:13
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] Power supplies
>
> HI Paul,
>
> Easy..
>
> Connect 2 PSU's as follows.
>
> +12V on second supply to GND on first. Your +12V is now the +Ve output
on
> the first supply and your -12V is the GND on the second supply. GND
will
> be
> the +Ve and -Ve (GND) on the joined connection. I'll try to do a
diagram
> below... I'll use a variable spaced font so make sure you use that
> yourself
> or it will look strange.
>
>            PSU1              PSU2
>      +               -      +               -
>       !               !       !               !
>       !               !-----!               !
>       !                    !                   !
>       !                    !                   !
>
>      +12V           GND           -12V
>
>
>
> Hope this makes sense
>
>
> Dave...