You'll need multiple power supplies

You will want multiple power supplies - for lots of reasons. If you want one switch to turn everything on, get yourself a power strip with an on-off switch.

Each booster on your layout should have its own power supply, since that isolates it in case you have issues - also you don't want your track power to be mixed with any other layout power for things like turnouts or layout accessories. Plus your bus should have its own power supply ...

In short, what you're trying to do is not a good idea. One switch is a good idea, sure, but one mega-power supply is NOT what you want if you want a system that's reliable and easy to debug. Look for other ways to do the one on-off switch.

Thanks Joe.  I had a sneaky

Thanks Joe.  I had a sneaky feeling it probably wasn't a good idea. 

I don't disagree with Joes

I don't disagree with Joes advice for your particular case, but if memory serves (50/50 chance! ), this particular power supply has two seperately protected 5 amp outputs and may be appropriate for use with two boosters in some circumstances.

You may want to pose the question on the digitrax yahoo group if you care enough. Personally I would use muliple smaller power supplies as Joe recommended. Its cheaper and more redundant.

Chris

NCE boosters need separate power supplies

NCE boosters do indeed need separate power supplies - if you try to hang more than one booster off the same transformer input, it fries the booster ... ask me how I know!

Digitrax PS 2012

The Digitrax PS2012 is designed for use with two Boosters, like a DCS200 (8A) Cheif and a DB200 (8A) Booster. For all other components a seperate supply is recommended. See documentation on the Digitrax site;

http://www.digitrax.com/manuals.php

Our modular group, Free-Modu-Rail uses one supply see the photos and schematics at the following URL:

http://www.free-modu-rail.com/modurail4_E2.htm#Electrical

Scroll half way down, if you have any questions I would be glad to answer them.

Directly from Digitrax Site,

Directly from Digitrax Site, actually it can support up to 4 (5A) Boosters, special Y cable is also available.

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Regulated power supply delivers more power with less heat for more efficient booster operation. Operate up to 4 Five amp boosters with the PS2012 supply. Scale selectable for use with N, HO or large scale. DC Ammeter. On/Off Switch. Integral cooling fan. Design coordinated for use with Digitrax products.