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NOTE:
The type of feed that you use on the DC PDM (60-A or 80-A) depends on the distribution
scheme and distribution equipment. With a 60-A feed, the maximum power supply output power
is limited to 2100 W while the maximum power supply input power is limited to 2400 W. With
an 80-A feed, the maximum power supply output is limited to 2500 W while the maximum power
supply input power is limited to 2800 W. The system power management software calculates
the available and used power based on DIP switch positions in the PDM.
SEE ALSO
Calculating DC Power Requirements for MX2008 Routers | 222
MX2008 DC Power (-48 V) System Electrical Specifications | 117
MX2008 Power System Description | 58
Site Electrical Wiring Guidelines for MX Series Routers | 590
MX2000 DC Power Distribution Module (240 V China) Description
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.
NOTE:
The power backplane for a subsystem distributes regulated 52 VDC to all boards supplied
by that subsystem.
Each DC PDM (240 V China) has nine DC inputs, (see
Figure 37 on page
98).
97
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