Power Requirements for DC-Powered SRX3600 Services Gateways
NOTE: If you plan to operate a maximally configured DC-powered services gateway, we recommend
that you provision 45 A @ -48 VDC for the system.
If you do not plan to provision 45 A @ -48 VDC for the system, you can use the information in
Table 26 on page 87 and Table 27 on page 87 to calculate the power consumption @ -48 VDC, and thermal
output for various hardware configurations.
Table 26 on page 87 lists the power requirements for base DC-powered services gateways operating
under typical voltage conditions.
Table 26: DC-Powered Base System Requirements
Power Requirement (Watts)DC Power Supply Configuration
375 W (approximate)Nonredundant configuration includes two DC power supplies, midplane,
SFB, Routing Engine, and fan tray
430 W (approximate)Redundant configuration includes four DC power supplies, midplane,
SFB, Routing Engine, and fan tray
NOTE: The power requirement values shown in Table 26 on page 87 are for a lightly loaded system.
For a heavily loaded system, the contribution of the base system to the overall system power
requirement is lower, because the power supply efficiency improves as the load increases. For a
heavily loaded system, both the redundant and nonredundant base systems contribute approximately
375 W to the overall system power requirement.
Table 27 on page 87 lists the power requirements for various hardware components when the services
gateway is operating under typical voltage conditions.
Table 27: Component DC Power Requirements
48V Input Power Requirement at 80%
Power Supply EfficiencyPower Requirement (Watts)Component
66 W53 WRouting Engine
148 W118 WSPC
87
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