MOTM

Paul, Can you be a little more specific in your recommendation.  Do you mean
on the AC side only or on the DC side of the supply.  It seems to that the
AC case ground is completely isolated from the DC side ground.  Of course,
if properly wired, all the cases should be common at ground.  I was
considering making the DC ground common at the PS as well.  Is that what you
mean?

Thanks,
Larry H

----- Original Message -----
From: Paul Schreiber <synth1@...>
In general, multiple supplies need to have a common ground
 *only* at the supplies. The 3-output Power Ones are
connected on the little pcb in the supply itself.

> I've bought a few spare Power One supplies that deliver +/- 15VDC and also
> have a +5VDC output in anticipation of the future MOTM sequencer.  Do you
> foresee any problem using multiple PSU's to power a large MOTM system?
I'm
> just wondering about any ground loop or other strange problems that might
be
> caused by multiple power supplies.

Well, the sequencer will have it's own power supply, probably (not a module,
a full 19" wide 2U
tall thing).

In general, multiple supplies need to have a common ground *only* at the
supplies. The 3-output
Power Ones are connected on the little pcb in the supply itself.

Now, if you had a +5V/GND module, you would run the wires to it, but *not*
daisy-chain the
grounds.

Paul S.