Mx2020 Dc Power Requirements; Table 47: Dc Power Cable Specifications - Juniper MX2020 Hardware Manual

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MX2020 DC Power Requirements

Copyright © 2013, Juniper Networks, Inc.
Appendix D: Power Guidelines, Requirements, and Specifications for the MX2020 Router
CAUTION: The router is a pluggable type A equipment installed in restricted
access location. It has a separate protective earthing terminal (Metric [–M6]
and English [–¼-20] screw ground lugs) provided on the chassis in addition
to the grounding pin of the power supply cord. This separate protective earth
terminal must be permanently connected to earth.
Table 47 on page 361 summarizes the specifications for the power cables, which you must
supply.

Table 47: DC Power Cable Specifications

Cable Type Quantity and Specification
Power Eighteen pairs of 4-AWG(13.3 mm
the local code
CAUTION: You must ensure that power connections maintain the proper
polarity. The power source cables might be labeled
their polarity. There is no standard color coding for DC power cables. The
color coding used by the external DC power source at your site determines
the color coding for the leads on the power cables that attach to the terminal
studs on each PDM.
MX2020 DC Power Supply Module Description on page 51
MX2020 DC Power Distribution Module Description on page 49
MX2020 DC Power Electrical Safety Guidelines on page 342
MX2020 DC Power Distribution on page 359
Connecting an MX2020 DC Power Distribution Module Cable on page 274
Table 48 on page 362 lists the FRU power requirements for SFBs, CB-REs, MPCs, and
MICs. In addition, Table 48 on page 362
optics at various operating temperatures.
Typical power represents power under certain temperatures and normal operating
conditions.
For PDMs with 60 A feeds, we recommend that you select the 60 A @ –48 VDC switch
for each input.
For PDMs with 80 A feeds, we recommend that you select the 80 A @ –48 VDC switch
for each input.
2
), minimum 90°C wire, or as required by
(+)
lists the MPC power requirements with MICs and
and to indicate
(–)
361