Re: IBMi UPS cable

[Buck Calabro <kc2hiz@xxxxxxxxx>]

On 12/11/2013 4:11 PM, Jerry Draper wrote:
> We use the MONUPSPWR CL IBM gives us to monitor a msgq for UPS statuses.
>
> We take appropriate action depending on what messages we get (or not).
>
> Now we have a situation where we have redundant AC on our IBMi connected
> to two different UPS systems.  (redundency of the redundent).
>
> We only have one port on the IBMi for a UPS sensor cable.
>
> IBM suggests a box with two UPS inputs to resolve to one UPS cable that
> attaches to the IBMi so if either UPS system said we were on UPS we
> would act as though we were on UPS.
>
> Jerry

I think the consensus is rapidly forming that there's no commercial box
that 'combines' the outputs of multiple UPS units.  That puts you in DIY
land.  Generally speaking, if I say 'diode or' and you say 'huh?' it's a
signal to me that I should advise you to hire this out locally.

  --buck

> On 12/11/2013 12:48 PM, Roberto José Etcheverry Romero wrote:
> > Depends on one's need. I would like my system to stay up if one grid lost
> > power but the other was OK (not running on battery). Some people might
> > want
> > to start a shutdown when only one of them fails. The Arduino path is
> > what i
> > meant when i said a tinkerer is the best choice to implement this, i'm 26
> > but i would've done it with logic gates, even simpler (less points of
> > failure, unless you want TCPIP monitoring, which an arduino can give
> > you).
> >
> >
> > On Wed, Dec 11, 2013 at 5:32 PM, DrFranken <midrange@xxxxxxxxxxxx> wrote:
> >
> > > Would you want the system to power down if only one UPS lost grid power?
> > > Would you want the system to power down if BOTH UPS lost input power?
> > >
> > > Looking to understand the logic in the magic box because an Arduino
> > > could do this very very easily.
> > >
> > >           - Larry "DrFranken" Bolhuis
> > >
> > > www.frankeni.com
> > > www.iDevCloud.com
> > > www.iInTheCloud.com
> > >
> > > On 12/11/2013 2:07 PM, Jerry Draper wrote:
> > >
> > > > We have an 8202-E4D with redundant power supplies (2 AC).
> > > >
> > > > Mgmt wants to connect each AC to a different UPS for UPS redundancy.
> > > >
> > > > We only have one port for the RJ45 UPS sensor cable (P1-T2).
> > > http://pic.dhe.ibm.com/infocenter/powersys/v3r1m5/index.jsp?topic=%2Fp7had%2Fp7hadups.htm
> > >
> > > > IBM suggested that we could build a box with two RJ45 in and one RJ45
> > > > out (or two DB9 to one DB9) that would detect UPS status from either
> > > > UPS
> > > > and send one signal to the IBMi.
> > > >
> > > > Anyone have this box or know where to get one?
> > > >
> > > > Thanks,
> > > >
> > > > Jerry