Calculating Power Requirements For Mx104 Routers; Table 28: Mx104 Fru Power Requirements - Juniper MX104 Hardware Manual

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Calculating Power Requirements for MX104 Routers

Copyright © 2014, Juniper Networks, Inc.
Appendix D: Power Guidelines, Requirements, and Specifications for the MX104 Router

Table 28: MX104 FRU Power Requirements

Component
Fan tray
MIC
AC power supply
DC power supply
Routing Engine
MX104 Power Consumption on page 164
MX104 AC Power Specifications on page 159
MX104 DC Power Specifications on page 162
The information in this topic helps you determine which power supplies are suitable for
various configurations, as well as which power supplies are not suitable because output
power is exceeded. You determine suitability by subtracting the total power draw from
the maximum output of the power supplies. Afterward, the required input power is
calculated. Finally, you calculate the thermal output. A sample configuration is provided
in Table 29 on page 166.
We recommend that you provision power according to the maximum input current listed
in the power supply electrical specifications (see
page 159 and "MX104 DC Power Specifications" on page
Use the following procedures to calculate the power requirement:
Calculate the power requirement.
1.
Evaluate the power budget.
2.
Calculate input power.
3.
Calculate thermal output (BTUs) for cooling requirements.
4.
The following sample configuration shows an MX104 router with:
Two (redundant) power supplies
Two (redundant) Routing Engines
Two 20-port Gigabit Ethernet MICs with SFP
Cooling system (standard fan tray and air filter)
Required Power (Watts)
100 W
For MIC power requirements, see
Module Reference .
600 W
625 W
35 W
"MX104 AC Power Specifications" on
162).
MX Series Interface
165