Srx5400 Services Gateway Power Guidelines, Requirements, And; Calculating Power Requirements For The Srx5400 Services Gateway - Juniper SRX5400 Hardware Manual

APPENDIX C
SRX5400 Services Gateway Power
Guidelines, Requirements, and
Specifications

Calculating Power Requirements for the SRX5400 Services Gateway

Copyright © 2014, Juniper Networks, Inc.
Calculating Power Requirements for the SRX5400 Services Gateway on page 189
SRX5400 Services Gateway Chassis Grounding Specifications on page 192
SRX5400 Services Gateway AC Power Specifications and Requirements on page 194
SRX5400 Services Gateway DC Power Specifications and Requirements on page 197
SRX5400 Services Gateway Electrical Wiring Guidelines on page 201
The information in this topic helps you determine which power supply configurations are
suitable for various services gateway configurations, as well as which configurations 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 current is calculated. Finally, you calculate the thermal output.
We recommend that you provision power according to the maximum input current listed
in the power supply electrical specifications (see
Supply Specifications" on page 194
Specifications" on page 197).
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.
"SRX5400 Services Gateway AC Power
and "SRX5400 Services Gateway DC Power Supply
189