[c-nsp] -48vdc lab power

[Mark Radabaugh]

Something like 
http://www.digikey.com/product-detail/en/DRP048V480W1BA/1145-1022-ND/3991706 
gets you 10A 48V (480W) that is pretty inexpensive ($160).

The output is isolated from ground so you can make it -48V or +48V 
depending on how you connect it.

If you need much more than 10A then finding an old rectifier shelf 
probably makes more sense.

The 20A version is $360: 
http://www.digikey.com/product-detail/en/DPP960-48-3/DPP960-48-3-ND/3984308

Mark




On 5/22/14, 10:33 PM, Daniel Hooper wrote:
> Eaton APS is another common one we use for -48v stuff, the Eltek stuff is hot dog but pricey for just lab work.
>
> At home I use a cheap jaycar variable lab DC supply, it has 2 x 30v outputs which I just run in series and trim the voltage down to about 54v, it's 6 amp so handles most things that find a way to the home lab.
>
> Meanwell is probably the supercheap no frills brand if you need it for a one time test
>
> -----Original Message-----
> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of John van Oppen
> Sent: Friday, 23 May 2014 7:40 AM
> To: 'Mike'; cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] -48vdc lab power
>
> We ended up placing a small-ish Emerson system in our office with a breaker panel and some telcoflex leads to the bench, really works nicely for testing this stuff and was not super expensive but allows bigger loads (ie ASR 9ks to be powered as well).
>
> John
>
> -----Original Message-----
> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Mike
> Sent: Thursday, May 22, 2014 11:16 AM
> To: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] -48vdc lab power
>
>
> On 05/22/2014 07:30 AM, Julien Goodwin wrote:
>> On 22/05/14 14:38, Mike wrote:
>>>       So I have a whole pile of new Cisco ASR1k and ME3600's which are
>>> intended for installation in a telco environment and all have -48vdc
>>> power supplies. There is a necessary detour however, I need to set
>>> these up in my lab environment so I can test configurations and get
>>> things as dialed-in as possible in advance of physical installation
>>> out at the telco locations. I don't want to buy AC power supplies for
>>> all of this just for testing.... there has to be a suitable -48vdc
>>> power system available somewhere that would be suitable to plug into
>>> my ac power and have enough juice to run all of this? Does anyone have any recommendations?
>> The magic search term is "48 rectifier" (actually -48, but you can't
>> search for that on eBay).
>>
>> Tyco & Eltek are two of the common vendors.
>>
>> I presume you've actually confirmed that the sites are native-DC,
>> that's getting increasingly rare.
>>
> Thanks both you and the previous poster who pointed me in the right direction. In this case, I'm in actual telco central offices and yes they are straight -48vdc all the way, ac is verboten.
>
> Mike-
>
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-- 
Mark Radabaugh
Amplex

mark at amplex.net  419.837.5015 x 1021