Re: AT Tower Power Supply switch wiring

Many thanks to John Kleinbauer, he answered the question. Great service!
Sorry to bother the Forum.

For others who have a similar question later, the answer is:
When the switch is pressed the Blue and white connect.
The Brown and Black connect on the other side (of the switch.)

BTW, for an ATX type power supply (used away from a computer) the
motherboard connector's pins 14 & 15 must be connect to each other for it to
run. Also, a load must exist on the 5v side for it to remain powered up.
Apparently you're not supposed to run these power supplies without load.

Legal disclaimer: No warranties expressed or implied, your mileage may vary,
wear protection, and remember, drink, don't drive...

Gary B-{)}

----- Original Message -----
From: Gary Wheeler <g.wheeler@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, December 30, 2001 3:35 PM
Subject: AT Tower Power Supply switch wiring


> Help! Am trying to use an old computer power supply to run a CNC
> controller. Benchtop dremel machine, Kleinbauer.com NCF2002. Simple
unit,
> will be using aluminum storefront window frame, but am having trouble
> powering up the power supply. Mr. Kleinbauer hasn't seen one like it.
>
> Would like to use an old AT tower-type power supply, 230 watt DC. But,
> can't figure out which wires were connected to turn on the supply. It was
> from a now obsolete full height tower case which had a line voltage
(DPDT?)
> switch on the front of the chassis. It has no power switch on the supply
> itself but instead uses 5 wires apparently of line voltage size with
> individual spade terminals. Which would connect to front of the chassis.
> One wire is a ground (green), another hot (white). Two are apparently
> reduced line voltage, about 100 VAC (blue, brown). One wire is apparently
> the neutral (black).
...