Juniper SRX5400, Hardware Manual

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Table 31: Calculating System Thermal Output (continued)
Thermal Output (BTUs per hour) Power Supply
2138 * 3.41 = 7291 BTU/hr SRX5400 DC
The following sample configuration shows an SRX5400 Services Gateway chassis with
various power supplies and:
• Two SRX5K-SPC-4-15-320 (SPC2) Services Processing Card (SPC) (slots 1 and 2)
• One IOC3 (SRX5K-MPC3-40G10G or SRX5K-MPC3-100G10G) (slot 1/0)
•
One switch control board SRX5K-SCB3 (SCB3) and one Routing Engine RE2 installed
in SCB slot 0
1.
Calculate the power requirements (usage) as shown in Table 32 on page 96 .
Table 32: Sample Power Requirements for an SRX5400 Services Gateway with SCB3, IOC3,
and RE2
Power Requirement Part Number Chassis Component
40 W SRX5400-CHAS Base system
75 W SRX5400-FAN Fan tray
607 W IOC3 MPC - slot 1/0
585 W * 2 = 1170 W SCP2 SPC - slots 1 and 2
300 W
90 W
SCB3
RE2
SCB 0
2282 W Total power requirement
2207 W Total power requirement 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 33 on page 97 lists the power supplies, their maximum output power, and unused
power (or a power deficit) for an AC-powered services gateway. Table 34 on page 97
Copyright © 2017, Juniper Networks, Inc. 96
SRX5400 Services Gateway Hardware Guide