
1. Calculate the power requirements (usage) using the values in “Power Requirements
for an MX480 Router” on page 289 as shown in Table 30 on page 287.
Table 30: Sample Power Requirements for an MX480 Router
ZonePower RequirementPart NumberChassis Component
—40 WMX480BASE-DC-HIGHBase system
Zone 0 and Zone 1160 WFFANTRAY-MX480-HCHigh-capacity cooling system
Zone 0440 WMPC-3D-16XGE-SFPP-R-BMPC - Slot 2
Zone 0440 WMPC-3D-16XGE-SFPP-R-BMPC - Slot 1
Zone 0150 W
90 W
SCB-MX960 with
RE-S-1800X2-8G
SCB 1
Zone 0150 W
90 W
SCB-MX960 with
RE-S-1800X2-8G
SCB 0
Zone 1310 WDPCE-R-4XGE-XFPDPC - Slot 3
1440 W
390 W
Zone 0 total output power
Zone 1 total output power
1360 W
310 W
Zone 0 total output power (excluding cooling system)
Zone 1 total output power (excluding cooling system)
2. Evaluate the power budget. In the case of a DC-powered chassis, evaluate the budget
for each zone. In this step, we check the required power against the maximum output
power of available power supply options.
NOTE: The power for the cooling system comes from a different tap on
the power supply, reserved for the cooling system only. The cooling system
power requirement does not need to be deducted from the output power
budget of the power supply.
Table 31 on page 288 lists the power supplies, their maximum output power, and unused
power (or a power deficit) for MX480 AC chassis.Table 32 on page 288 lists the power
supplies, their maximum output power, and unused power (or a power deficit) for
MX480 DC chassis. See “AC Electrical Specifications for the MX480 Router” on page 297
and “DC Power Supply Electrical Specifications for the MX480 Router” on page 301
for more information about the MX480 power supply electrical specifications.
287Copyright © 2013, Juniper Networks, Inc.
Appendix D: Power Guidelines, Requirements, and Specifications for the MX480 Router
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