Re: Redundant Power Supply or battery backup for net6501
Chris Boot <[email protected]>
| Newsgroups | gmane.comp.hardware.soekris.technical |
|---|---|
| Message-ID | <[email protected]> |
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]