Juniper SRX5400 Hardware Manual page 205

Table 24: Calculating Power Budget, AC-Powered Chassis
Maximum Output Power of Power
Supply
1167 W (low-line)
2050 W (high-line)
Table 25: Calculating Power Budget, DC Powered Chassis
Maximum Output Power of Power
Supply
2240 W (DIP=0)
2440 W (DIP=1)
Table 26: Calculating System Input Power
Power Supply
SRX5400 AC
SRX5400 DC
Table 27: Calculating System Thermal Output
Power Supply
SRX5400 AC
SRX5400 DC
Copyright © 2014, Juniper Networks, Inc.
Appendix C: SRX5400 Services Gateway Power Guidelines, Requirements, and Specifications
Maximum Output Power for System
3501 W
(2+1 Redundancy)
4100 W
(2+1 Redundancy)
Maximum Output Power for System
2240 W
(2+2 Redundancy)
2440 W
(2+2 Redundancy)
Calculate input power. In this step, the input power requirements for the example
3.
configuration are calculated. To do this, divide the total output requirement by the
efficiency of the power supply as shown in
power drawn by the cooling system.
Power Supply Efficiency
89 %
~98 %
1
These values are at full load and nominal voltage.
Calculate thermal output (BTUs) for the system. To calculate this value, multiply the
4.
total input power requirement (in watts) by 3.41 as shown in
Thermal Output (BTUs per hour)
2365 * 3.41 = 8065 BTU/hr
2148 * 3.41 = 7325 BTU/hr
Unused Power
3501 - 2020 = 1481 W
4100 - 3810 = 2080 W
Unused Power
2240 - 2020 = 220 W
2440 - 2020 = 420 W
Table 26 on page 191
1
Input Power Requirement
2105/0.89 = 2365 W
2105/0.98 = 2148 W
Here we include the
Table 27 on page 191.
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