[Mikrotik] 450G question

Martín Ruiz [Ibersystems.es] martinruiz at ibersystems.es
Thu Mar 24 13:40:07 CDT 2011


55ºC shown in the datasheet, but I have several 450Gs working with 24V and
60-65ºC. One of them, died 2 months ago and I'am changing from 24 to 12V.

; )


 * Martín Ruiz*
* *
 *Ibersystems Solutions, SL*
* *




2011/3/24 Scott Lambert <lambert at lambertfam.org>

> On Thu, Mar 24, 2011 at 06:32:22PM +0100, Martín Ruiz [Ibersystems.es]
> wrote:
> > 2011/3/24 john <john at rcsaccess.net>
> > > I have been having a weird problem with 450G routers.  They seem to not
> > > reboot when you tell it to reboot in the software.  You have to Hard
> Boot
> > > it.  The lights go off and it just sits there.  All but the Blue light.
>  I
> > > have one that I just got out of the box and upgraded it to 4.17.  the
> first
> > > reboot went well.  I did a reboot to upgrade firmware and it happened.
>  We
> > > mainly use POE Power supplies that run 24i.  Anyone else has any
> problems
> > > with certain power supplies or this problem?
> > >
> >
> > I had problems with 24V in 450s. Use 12V better, but the problems was
> with
> > heat 60-65 C..
>
> I don't know what the temp was on my boards when they failed to
> reboot after a firmware upgrade.  My 450Gs use 12V power supplies.
> One supply on the 450G which failed to reboot on upgrade in the
> field says it sees 11.4V from the power supply, according to MRTG.
>
> In the 24 hours I've had MRTG setup to graph voltage and temp, the
> voltage has been a constant 11.4v.  The temp has varied from 42 C
> to 56 C.  Unfortunately the problem firmware upgrade happened a
> week before I found time to add the temp and voltage monitoring to
> the mrtg host templates.
>
> How hot is too hot for these things?  I haven't found the answer
> to that question via google searches after a couple of hours of
> digging through the query results.
>
> --
> Scott Lambert                    KC5MLE                       Unix SysAdmin
> lambert at lambertfam.org
>
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