[Soekris] Redundant Power Supply or battery backup for net6501
Hi everyone, there exist older entries for a redundant power supply or battery backed up units, yet not so much up to date information about the beloved net6501. Recently, I had a UPS failure which took down my rack-mounted net6501. I'm interessted in either a redundant power supply or a battery backup unit, which Soren claimed to be released shortly in early 2013 (Any news Soren?). Best regards, Andreas ___ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
Re: [Soekris] Redundant Power Supply or battery backup for net6501
Hi Greg, Hi List, On Fri, Aug 1, 2014 at 12:49 PM, Greg Troxel g...@lexort.com 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)? And another important question: How can I get it to fit in the rackmount kit? What is the current state of the onboard NiMH loader? On the homepage and in the manual is stated, that a 'NiMH battery backup connector with charge and monitoring' exists, has this been tried yet? If so, does it work and with what NiMH battery type? Soren wrote in the aforementioned post about releasing something, would this be hardware or a software patch of the fpga or kind-a chip upgrade to implement this battery charging functionality? Best, Andreas ___ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
Re: [Soekris] Redundant Power Supply or battery backup for net6501
On 01/08/2014 17:54, Andreas Steinel wrote: Hi Greg, Hi List, On Fri, Aug 1, 2014 at 12:49 PM, Greg Troxel g...@lexort.com 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 bo...@bootc.net ___ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
Re: [Soekris] Redundant Power Supply or battery backup for net6501
Chris Boot bo...@bootc.net writes: On 01/08/2014 17:54, Andreas Steinel wrote: On Fri, Aug 1, 2014 at 12:49 PM, Greg Troxel g...@lexort.com 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 I do is to provide 12V via the 5.5x2.1 barrel connector to the net5501 in a case, just as if the wire were coming from a wall wart. Each battery has a fuse in the positive lead, and then Anderson Powerpole connectors, and is plugged into a West Mountain Radio RigRunner. I then have a 12V wall wart (that produces more) via a cheap solar charge controller hooked up to the RigRunner as well. This sounds a little kludgy, and it sort of is, but I'm coming at this from having parts for ham radio emergency use of 12V batteries and a very small off-grid solar system, so it works for me. Compared to all of this, if you don't already have it and aren't already familiar, the OpenUPS looks really nice. And, it seems to have low-voltage shutdown, monitoring, etc. Plus, you can set the output for 6V so that you lose less in the regulator. The picoUPS looks interesting too, but needs to be a in 12V world, it seems. Putting this inside the rackmount case may or may not work. Where my net5501 is I have enough other space that I haven't had to worry about this. You can also just plug the 12V power supply into a regular 120VAC UPS (or rather your local normal line voltage). ___ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
