Figure 28: Dc Power Supply - Juniper QFX10016 Hardware Manual

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Figure 28: DC Power Supply

NOTE: The DC power supply requires a dedicated circuit breaker for each
input DC feed. The chosen breaker should be sized to deliver 60 A of input
current.
Each power supply connects to the combined power rail in a QFX10008 or QFX10016.
The power rail distributes the output power produced by the power supplies to different
switch components. Each AC power supply provides power to all the components in the
switch.
A DC power supply can operate with only one input DC feed connected. The Control
Board only enables the components for which sufficient power is available.
Each DC power supply has its own fan and is cooled by its own internal cooling system.
The airflow is from the front of the power supply to the back. Hot air exhausts from the
rear of the chassis.
QFX10000 DC Power Specifications on page 123
QFX10000 DC Power Supply LEDs on page 49
Installing a QFX10000 DC Power Supply on page 198
Removing a QFX10000 DC Power Supply on page 207
Chapter 5: Power System Components and Descriptions
47