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MX2008 DC Power Distribution Module (-48 V) 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 power distribution modules (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 chassis) for nonredundant power. The DC PDM provides
a power interface to nine power supply modules (PSMs).
Two PDMs provide full redundancy. In a redundant configuration, a total of fourteen 60-A or 80-A input
feeds (7-feed DC PDMs), and a total of eighteen 60-A or 80-A input feeds (9-feed DC PDMs) are supported.
NOTE:
The power backplane for a subsystem distributes regulated 52 VDC to all boards supplied
by that subsystem.
Each DC PDM has seven or nine DC inputs (–48 VDC and return terminals for each input). You can select
60-A or 80-A input feed capacity on the DC PDM by setting the DIP switch on the PDM to the rated
amperage of the DC power input feeds.
NOTE:
The selected input capacity applies to all inputs of this PDM. Selecting 60 A reduces the
available power output capacity of the PSMs supplied by this PDM.
Figure 36 on page 96
shows the MX2008 DC PDM.
Figure 36: MX2008 DC PDM
96
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