Mx2020 Dc Power Distribution Module Leds; Figure 47: Dc Power Distribution Module - Juniper MX2020 Hardware Manual

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MX2020 DC Power Distribution Module LEDs

Copyright © 2015, Juniper Networks, Inc.
Each DC PDM has nine DC inputs (–48 VDC and return terminals for each input), (see
Figure 44 on page 91). 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.

Figure 47: DC Power Distribution Module

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 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.
MX2020 DC Power Distribution Module LEDs on page 95
MX2020 Router Grounding Specifications on page 117
Calculating DC Power Requirements for MX2020 Routers on page 180
DC Power Circuit Breaker Requirements for the MX2020 Router on page 184
MX2020 DC Power Distribution Description on page 177
DC Power Cable Specifications for the MX2020 Router on page 184
Site Electrical Wiring Guidelines for MX Series Routers on page 592
Each DC PDM faceplate contains one bicolor LED for each of the nine –48 V input power
feeds, indicating the correct or incorrect polarity connection of each feed.
SeeTable 33 on page 96. See Figure 48 on page 96.
Chapter 9: Power Subsystem
95