Hi
You can buy inlet/fuse/switch and even filter as complete assemblies and
assuming you are happy with having the switch on that plate you are
largely done. Look at Mouser Digikey etc catalogues.
You MUST connect a thick ground wire from the inlet ground tag to a
SEPARATE bolt with crinkle washers onto the metalwork to provide the
first part of safety measures. Take the ground wire from the modules or
wherever to another solder tag with ANOTHER nut / crinkle washers so
that you cannot disconnect chassis ground accidentally.
ALL metalwork of a box that is connected to the mains should have 'bond'
wires or measures that ensure that EVERY metallic panel is securely
grounded.
Elektor magazine (and I expect others) will have a page detailing
electrical safety and how to correctly wire the mains up.
Fitting a PSU into a box with the modules is generally a bad idea as
there is a distinct risk of hum unless it is a correctly orientated
torroidal transformer.
Matt S
On 22/09/2010 15:02, Robert Lugo wrote:
Hello everyone!
Long story short, I bought some already racked strips.
They are wired for a 4-pin external power supply. I called up Mike
Stoica and he made me a power supply to put in the rack enclosure with
the strips. Very cool. Now I have it but I need to wire it, source an AC inlet
and install it.
1. As far as wiring the 48v, Ground, +18v, -18v, I know the wiring scheme of
the rack and Mike's PSU is clearly labeled. see images here:
http://destroybigbrother.com/images/neotek/ I believe the points Mike dotted
are the solder points on the underside as labeled on the topside.
2. Sourcing an AC inlet/power entry module: I don't know what I need. What have
you guys used? I would like a fuse and in it and wish to use one of the
buss/2mix routing switches for power on/off if feasible. To my deduction (based
entirely on staring at these PCBs and pictures of AC inlets/P.E.M.s for long
periods of time) it seems the ideal AC inlet/P.E.M. would be 2 poles + ground,
but that does not address power on/off, so this is the purpose of 4 pole AC
inlets/P.E.M. right? with 2 poles it would be constant flow of current when
plugged in so 4 poles are introduced to allow switched interruption in the
circuit, or is that wrong?
3. Safely/properly grounding: am i correct in that once i find the right AC
inlet/P.E.M. all should have to do is wire the green cable (labeled Module
GND/chassis) to the proper pole on the AC inlet/P.E.M. and be done with it?
I know this is a 15 minute job but I've been hung up on these bits since July
15!!! All I need is the correct info, directions to the correct info, or a
confirmation that my conclusions are right...
Thanks in advance,
Robert Lugo
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