Kentrox CSU Power Distribution

mjamm

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Dec 25, 2004, 8:56:38 PM12/25/04

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I have 12 Kentrox Tserv II - CSU's mounted in a 19" communications
equipment rack. Each CSU has a separate 28VDC power supply. The design
of the power supply is such that when plugged into an electrical
outlet, it covers the next open socket as well.

I am looking for a 28VDC power supply that I could use to power some or
all of the CSU's from a single unit with some type of
terminal bus to attach the CSU's to.

Any help help in locating such a power supply would be greatly
appreciated.

Someone

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Dec 25, 2004, 9:43:52 PM12/25/04

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I can't help with the power supply, but here's something that can
help with the "covered outlet" problem with wallwart power adapters:

http://www.pcconnection.com/ProductDetail?sku=353440
http://www.pcconnection.com/ProductDetail?sku=353439

"mjamm" <mja...@aol.com> wrote in message
news:1104026198.7...@c13g2000cwb.googlegroups.com...

obsidian

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Dec 26, 2004, 6:54:03 AM12/26/04

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would using a short power extension lead help?

--
obsidian

"mjamm" <mja...@aol.com> wrote in message
news:1104026198.7...@c13g2000cwb.googlegroups.com...

Roger Elmore

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Dec 26, 2004, 1:24:17 PM12/26/04

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>"mjamm" wrote:
>I have 12 Kentrox Tserv II - CSU's mounted in a 19" communications
>equipment rack.

<snip>

>I am looking for a 28VDC power supply that I could use to power some
>or all of the CSU's from a single unit with some type of terminal bus to
>attach the CSU's to.

The CSUs specs
http://www.pulsewan.com/kentrox/tserv2_manual.pdf
state that will work on 20-56V DC @ 30-60mA (depending on voltage).
We power ours (wall mounted Kentrox rather than in a rack) from the
-48VDC of the rectifier going to our NEAX 2400 IPX. The PBX has fused
aux outputs on the supply bus. The power is routed to some 110 blocks
on the backboard between the switch and field blocks where it
distributes to the CSUs.

If it's not convienient to pull power from your rectifier/batteries,
I'd suggest a stand-alone UPS and a power supply similar to this:
http://www.mpja.com/directview.asp?product=6632+PS

At 48V/30mA, with 12 units you're looking at a draw of about 360mA,
and with a 3A output, this supply will give you that and more. You
can also look at MPJA's P#s 6630-PS (0.5A output) and 6631-PS
(1Aoutput) by doing a search off their pages. Any of these three are
less than 5" wide and 9" long, so they would fit on the back of a 3U
blank panel (8131-LM natural aluminum or 8132-LM, black) with some
minor fabrication on your part. You could use a Cinch barrier strip
for distribution, or if you wanted individually fused outputs you
could run a bus between some panel mount fuseholders and take the
other side of the fuse to each of your KSUs. If you're the least bit
handy and don't mind rolling your own, this could be an option to get
rid of your wall-warts.

We're using 24AWG cross connect wire from the 110 blocks to the
terminal block on the wall-mounted CSUs, so wire gauge for what power
they're going to draw shouldn't be much of a worry for you.

As fo something commercially built, I haven't researched it since the
following is the way I've tackled a situation similar to yours
previously.
--
Roger Elmore
IT Telecommunications
University of Tennessee at Martin

Reed

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Dec 27, 2004, 11:46:22 PM12/27/04

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take a look at the power supply section of the spec sheet:

http://www.kentrox.com/products/tserv2/ordering.html

several choices of units capable of powering multiple csu's
available from your neighborhood reseller...