Re: Redundant Power Supply or battery backup for net6501

Hi Chris,

The OpenUPS2 looks really nice and has a 2,5'' mount option. Have you
installed it in a rackmount case? Should fit, shouldn't it?

On Fri, Aug 1, 2014 at 10:36 PM, Chris Boot <[email protected]> wrote:
> On 01/08/2014 17:54, Andreas Steinel wrote:
>> Hi Greg,
>> Hi List,
>>
>> On Fri, Aug 1, 2014 at 12:49 PM, Greg Troxel <[email protected]> wrote:
>>> I have a net5501, and measured that with a 2.5" disk (not ssd) it draws
>>> about 500 mA at 12V.  I have it connected to several sealed lead-acid
>>> batteries in parallel, typically a 12Ah and two 7Ah.  These batteries
>>> are on float charge to keep them at 13.5V when there is AC power from
>>> the utility.  When the utility power fails, the net5501 continues to
>>> run, and should last for many hours.
>>
>> Thank you for sharing your solution. How is the (complete) schematic
>> for your setup (I saw the fuses and bypass capacitor missing schematic
>> of phk which uses a similar setup as yours)? Is there also a charge
>> protecting circuit involved or is the battery charging restricted
>> (e.g. delta-V)?
>
> Personally, I use Mini-Box OpenUPS devices:
>
> http://www.mini-box.com/OpenUPS
> http://www.mini-box.com/OpenUPS2
>
> They have proper charge controllers on board for all kinds of battery
> chemistries, and work really nicely.
>
>> What is the current state of the onboard NiMH loader?
>
> Vaporware, fairy dust, rocking horse sh*t, unobtainium, etc...
>
> As far as this list is aware, nobody has ever seen it in working order.
>
> HTH,
> Chris
>
> --
> Chris Boot
> [email protected]