•
Ensure that the airflow direction of the power supply is the same as the chassis. Labels
on the power supply handle indicate the direction of airflow. See “QFX5110 Cooling
System and Airflow Description” on page 39 for more information.
To install a power supply in a QFX5110 (see Figure 39 on page 113):
1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD
point on the chassis.
2. Taking care not to touch power supply components, pins, leads, or solder connections,
remove the power supply from its bag.
CAUTION: Verify that the direction of the arrow on the power supply
handle matches the direction of airflow in the chassis. Ensure that each
power supply you install in the chassis has the same airflow direction. If
you install power supplies with two different airflow directions, Junos OS
raises an alarm, and the status (ALM) LED blinks amber.
3. Using both hands, lift the power supply and place it over the EMI gasket (if present)
in the power supply slot and slide the power supply into place.
Figure 38: Installing a Power Supply in a QFX5110-32Q with EMI Gasket
NOTE: The EMI gasket is not present in QFX5110-48S switch.
4. Ensure the power supply is fully seated and the locking lever is in place.
Copyright © 2019, Juniper Networks, Inc.112
QFX5110 Switch Hardware Guide
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