Re: Wiring a UPS to a Power 720 8202-E4C

[Roberto José Etcheverry Romero <yggdrasil.raiker@xxxxxxxxx>]

i believe you need both adapters, the rj45 to db9 and the db9 to db9. At
least thats what APC user manual claims.

Best Regards


On Thu, May 30, 2013 at 12:05 PM, Buck Calabro <kc2hiz@xxxxxxxxx> wrote:

> The UPS has a communications cable coming out of it which terminates in
> a DB9 male.  Pins 5-9 are populated.
>
> The server has an adapter cable IBM p/n 46K5108.  One end is an RJ45 and
> that end is plugged into port S2.  The other end is a DB9 female.
>
> It would seem like a no-brainer to plug the DB9 male from the UPS into
> the DB9 female coming from the Power 7, but I'm wary of that because the
> Power 7 Systems Hardware information guide
>
> http://pic.dhe.ibm.com/infocenter/powersys/v3r1m5/index.jsp?topic=/p7had/p7hadups.htm
> doesn't mention an RJ45 cable with a DB9 female.
>
> It DOES mention a f/c 3930 adapter from RJ45 to DB9 male and it also
> mentions a f/c 1827 adapter cable which is a DB9 female to DB9 female.
> It seems to me that the f/c 1827 is necessary to tell the service
> processor a UPS is attached because it ties pins 2 and 7 together on the
> server side.
>
> My system order shows that I ordered an 1827 but of course I can't
> locate it from 9 months ago.  I can make one up easily enough, so that's
> not a show stopper.
>
> Do I trust the manual or is there a newer reference I should be looking
> at?  I'm not plugging anything into the back of the server until I am
> convinced that it's OK to do so.
>   --buck
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