Mx2008 Seven-Feed Dc Power Distribution Module Description - Juniper MX2008 Hardware Manual

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MX2008 Seven-Feed DC Power Distribution Module Description

NOTE:
The MX2008, MX2010, and MX2020 routers support the same power modules (AC/DC
PSMs and AC/DC PDMs).
In the DC power configuration, the router contains up to two DC PDMs located at the rear of the chassis
in slots PDM0/Input0 and PDM1/Input1 (bottom to top). A minimum of one PDM is required per system
(two PDMs per MX2008 chassis) for nonredundant power. The DC PDMs provides power interface to
nine PSMs.
Four PDMs provide full redundancy.
NOTE:
Power backplane distributes regulated 52 VDC to all boards supplied by that system.
Each DC PDM has seven DC inputs (–48 VDC and return terminals for each input) (see
Figure 35 on page
95). Select 60 A or 80 A input feed capacity on the DC PDM by setting the switch to
the rated amperage of DC power input feeds.
NOTE:
This switch applies to all inputs of this PDM. Selecting 60 A reduces the available power
output capacity of the PSMs supplied by this PDM.
94

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