I have a PS2 wired to the 12 starting battery of a generator which starts
and stops a few times a day with no issues. The PS2 doesn't even reset when
the gen starts and the battery pulls down to around 8~9 volts while the
starter is cranking. When the gen runs the batt voltage goes to ~14.6.

Greg

On Mon, Oct 15, 2012 at 1:50 PM, Josh Luthman
<[email protected]>wrote:

> ~12v should be OK by specs, but I've never heard of anyone doing such a
> "low" voltage to a Ubnt device.  Not sure if no ones tried it or it just
> ended quickly in failure.
>
> Just be aware that 24v and 12v batteries have a higher voltage for
> charging.
>
> Josh Luthman
> Office: 937-552-2340
> Direct: 937-552-2343
> 1100 Wayne St
> Suite 1337
> Troy, OH 45373
>
>
> On Mon, Oct 15, 2012 at 1:44 PM, Olufemi Adalemo <[email protected]>wrote:
>
>> It just dawned on me that I may have been barking up the wrong tree
>> I only have the one NSM5 to connect, I could hook this up to the parallel
>> segment of my battery bank and get only 12v while the rest of the
>> installation that's connected in series gets 24v. Do you think this will
>> work? Don't really have to worry about the NSM5 running down the battery
>> cause load is low and the cable run is under 10m so the voltage drop from
>> 12v will be negligible
>>
>> So this is how it would be:
>> 24v solar panel connected to 24v charge controller with 4 x 12v batteries
>> connected in a 2x2 series/parallel array. cable connected to the parallel
>> segment of battery bank (theoretically giving 12v to the NSM5), rest of the
>> load connected to the charge controller at 24v
>>
>> What do you think?
>>
>> - - -
>> *Olufemi Adalemo*
>> M: +234-803-5610040
>> M: +234-809-8610040
>> [email protected]
>>
>>
>>
>>
>> On Fri, Oct 12, 2012 at 8:18 PM, Kristian Hoffmann 
>> <[email protected]>wrote:
>>
>>>  Ya, it should be +24 on pins 4,5 and -24/comm on 7,8.  If it blew up
>>> then there was probably a short somewhere.
>>>
>>> -Kristian
>>>
>>>
>>> On 10/12/2012 11:11 AM, Olufemi Adalemo wrote:
>>>
>>> Ah ok, it is possible that the guys didn't get the polarity right
>>> I will check though they swear that they did
>>>
>>>
>>>   - - -
>>> *Olufemi Adalemo*
>>>  M: +234-803-5610040
>>> M: +234-809-8610040
>>>  [email protected]
>>>
>>>
>>>
>>>
>>> On Fri, Oct 12, 2012 at 7:05 PM, Josh Luthman <
>>> [email protected]> wrote:
>>>
>>>> What voltage were the batteries spitting out?  They charge at 27v but
>>>> without a charger put out much closer to 24v until they begin discharging.
>>>>  If it fried the radio I would first think that it was connected wrong, not
>>>> that the voltage was too high.
>>>>
>>>> Josh Luthman
>>>> Office: 937-552-2340
>>>> Direct: 937-552-2343
>>>> 1100 Wayne St
>>>> Suite 1337
>>>> Troy, OH 45373
>>>>
>>>>
>>>>   On Fri, Oct 12, 2012 at 2:02 PM, Olufemi Adalemo 
>>>> <[email protected]>wrote:
>>>>
>>>>> What's your typical config for the NSM5?
>>>>> Some of my guys just tried to power one off a 24v battery bank (no
>>>>> charger connected just battery) and it fried good
>>>>>
>>>>>   - - -
>>>>> *Olufemi Adalemo*
>>>>>  M: +234-803-5610040
>>>>> M: +234-809-8610040
>>>>>  [email protected]
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>   On Fri, Oct 12, 2012 at 6:56 PM, Kristian Hoffmann <
>>>>> [email protected]> wrote:
>>>>>
>>>>>>  We have MT and Ubnt equipment of all shapes and sizes running at
>>>>>> 27.6V.  The only problems we've had are a handful of freak RB411s that
>>>>>> won't power on with >27V.  Most of the older ones wouldn't kick into
>>>>>> overvoltage protection until >28V, but we've come across a few odd balls.
>>>>>>
>>>>>> -Kristian
>>>>>>
>>>>>>
>>>>>> On 10/12/2012 10:44 AM, Josh Luthman wrote:
>>>>>>
>>>>>> Charger isn't going to spit out 24v for batteries that need charged,
>>>>>> it's usually 27v.
>>>>>>
>>>>>>  I was under the impression they would simply lock up and you could
>>>>>> reboot, or maybe I'm just thinking of MT.
>>>>>>
>>>>>> Josh Luthman
>>>>>> Office: 937-552-2340
>>>>>> Direct: 937-552-2343
>>>>>> 1100 Wayne St
>>>>>> Suite 1337
>>>>>> Troy, OH 45373
>>>>>>
>>>>>>
>>>>>> On Fri, Oct 12, 2012 at 10:08 PM, Olufemi Adalemo 
>>>>>> <[email protected]>wrote:
>>>>>>
>>>>>>> Aha, thanks
>>>>>>> That explains why I have a dead NSM5 on my desk
>>>>>>> I guess the charge controller is not very good at giving out 24v
>>>>>>> regulated power
>>>>>>>
>>>>>>>   - - -
>>>>>>> *Olufemi Adalemo*
>>>>>>>  M: +234-803-5610040
>>>>>>> M: +234-809-8610040
>>>>>>>  [email protected]
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>   On Fri, Oct 12, 2012 at 6:17 PM, Josh Luthman <
>>>>>>> [email protected]> wrote:
>>>>>>>
>>>>>>>> Yes you will.  The batteries will probably be around 27v which Ubnt
>>>>>>>> won't like.  You'll need to clean the ~18-27v from the batteries to 
>>>>>>>> 24v.
>>>>>>>>
>>>>>>>> Josh Luthman
>>>>>>>> Office: 937-552-2340
>>>>>>>> Direct: 937-552-2343
>>>>>>>> 1100 Wayne St
>>>>>>>> Suite 1337
>>>>>>>> Troy, OH 45373
>>>>>>>>
>>>>>>>>
>>>>>>>>  On Fri, Oct 12, 2012 at 1:14 PM, Olufemi Adalemo <
>>>>>>>> [email protected]> wrote:
>>>>>>>>
>>>>>>>>>  Need help,
>>>>>>>>> I'm looking to deploy a UBNT NSM5 powered by a 24v solar supply.
>>>>>>>>> Does anyone have experience with this? The data sheet shows that
>>>>>>>>> it requires a 24v supply however the POE injector supplied is 15v, do 
>>>>>>>>> I
>>>>>>>>> need a DC to DC converter?
>>>>>>>>>
>>>>>>>>>  Best regards,
>>>>>>>>>   - - -
>>>>>>>>> *Olufemi Adalemo*
>>>>>>>>>  M: +234-803-5610040
>>>>>>>>> M: +234-809-8610040
>>>>>>>>>  [email protected]
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
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