Connecting Dc Power To A Qfx3500, Qfx3600, Or Qfx3600-I Device - Juniper QFX5110 Series Hardware Documentation

replacement power supply ready: the power supplies or a blank cover panel must be installed in the
device to ensure proper airflow.
CAUTION:
within 1 minute of removal to prevent chassis overheating.
RELATED DOCUMENTATION
AC Power Supply for a QFX3500, QFX3600, or QFX3600-I Device
AC Power Supply LEDs on a QFX3500, QFX3600, or QFX3600-I Device | 523

Connecting DC Power to a QFX3500, QFX3600, or QFX3600-I Device

The QFX3500, QFX3600, and QFX3600-I devices are shipped from the factory with two 650 W power
supplies pre-installed. Each power supply is a hot-removable and hot-insertable field-replaceable unit
(FRU) when the second power supply is installed and running. You can install replacement power supplies
without powering off the device or disrupting the switching function.
WARNING:
for installation only in a restricted access location.
NOTE: The battery returns of the DC power supply should be connected as an isolated DC
return (DC-I).
Before you begin connecting DC power to the device:
Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage
(see "Prevention of Electrostatic Discharge Damage" on page
Ensure that you have connected the device chassis to earth ground.
Replace a failed power supply with a blank panel or new power supply
DC-powered QFX3500, QFX3600 and QFX3600-I devices are intended
242).
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