Juniper EX4650 Series, Hardware Manual, Page: 111 / 195

Figure 48: Removing a Power Supply from an EX4650
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Installing an AC Power Supply in an EX4650 Switch
The AC power supply in EX4660 switches is a hot-removable and hot-insertable field-replaceable unit
(FRU) installed in the rear panel of the switch: You can remove and replace a power supply without powering
off the switch or disrupting switch functions.
CAUTION: Do not mix:
•
AC and DC power supplies in the same chassis.
•
Power supplies with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the
same chassis.
•
Fan modules with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the same
chassis.
•
Power supplies and fan modules with different airflow labels (AIR IN (AFI) and AIR
OUT (AFO)) in the same chassis.
Before you install an AC power supply in the switch:
•
Ensure that you understand how to prevent electrostatic discharge (ESD) damage. See “Prevention of
Electrostatic Discharge Damage” on page 177 .
Ensure that you have the following parts and tools available to install the power supply:
NOTE: Each power supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when
the second power supply is installed and running
•
ESD grounding strap
•
Phillips (+) screwdriver, number 2(not provided)
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