[j-nsp] MX960 Power Options

[Sebastian Wiesinger]

* sthaug at nethelp.no <sthaug at nethelp.no> [2016-01-26 14:24]:
> > > I recommend 4 x 208V.  The MX960 uses "power zones" in a 2+2
> > > arrangement where half of the chassis is powered by 2 PEMs, and the
> > > other half of the chassis is powered by the other 2 PEMs.  Make sure
> > > the 1st PEM for each zone is powered by the A feed, and the 2nd PEM
> > > for each zone is powered by the B feed.  For dual-input PEMs, you
> > > should put both inputs of a single PEM on the same branch circuit,
> > > either A or B.
> > 
> > Hi Chuck,
> > 
> > why would one want to put both inputs on the same circuit? That kind
> > of defeats the purpose in my mind. Are there caveats?
> 
> He's talking about dual-input PEMs. 4 PEMs, 8 inputs. In this case it
> makes sense to both inputs of a single PEM on the same branch circuit
> (this is explicitly what Juniper recommends).

Hi Steinar,

yes that's how I understood it but I was under the impression that I
could use that to have redundancy for a single PEM as well. Seems I
was mistaken. :)

Regards

Sebastian

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