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Table 18: MX2008 DC Power Components (continued)
Component
DC Power Distribution Modules (PDMs)
DC Power Distribution Modules (240 V
China)
DC Power Supply Modules (PSMs)
Description
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 provide full redundancy. The DC PDM provides a
power interface to nine PSMs. Each DC PDM operates with seven feeds
or nine feeds of either a 60-A or 80-A amp current limit. You can select
the input feed capacity (60-A or 80-A) by setting the DIP switch on the
PDM to the rated amperage of the DC power input feeds. Each DC
PDM has seven or nine DC inputs (–48 VDC and return terminals for
each input).
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.
In a redundant configuration, the 7-feed DC PDMs support a total of
fourteen 60-A or 80-A feeds, and the 9-feed DC PDMs support a total
of eighteen 60-A or 80-A feeds.
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 for the router. In a redundant
configuration, a total of a total of eighteen (9-feed DC PDMs) are
supported.
The MX2008 DC PSMs (-48 V and 240 V China) are hot-removable
and hot-insertable. The DC PSMs are a dual redundant feed (INP0 and
INP1). To provide feed redundancy, you can connect each DC PSM to
two separate feeds from different sources. When both input feeds are
present, power is drawn from the feed supplying higher DC voltage.
You can set these feeds by using the input mode DIP switch located
on the DC PSM (see
"MX2008 DC Power Supply Module (-48 V)
Description" on page
100). There are two PDMs per power system
capable of carrying seven feeds or nine feeds each. Each DC PSM is
capable of delivering 2500 W of power if -48 V/80 A is applied to the
-48 V PSM, and 240 V/20 A is applied to the China 240 VDC PSM.
60
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