Juniper QFX5240 - Install an AC Power Supply Unit in QFX5240 Switches

Install an AC Power Supply Unit in QFX5240 Switches
• Before you install a power supply in QFX5240 switches, ensure that you have taken the necessary
precauons to prevent electrostac discharge (ESD) damage.
• Ensure that the airow direcon of the power supply is the same as the chassis. Labels on the power
supply handle indicate the direcon of airow. See "QFX5240 Cooling System" on page 32 for more
informaon.
To install a power supply in a QFX5240 Switch:
1. Aach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the
chassis.
2. Take care not to touch power supply components, pins, leads, or solder connecons as you remove
the power supply from its bag.
CAUTION: Verify that the direcon of the arrow on the power supply handle matches
the direcon of airow in the chassis. Ensure that each power supply you install in the
chassis has the same airow direcon. If you install power supplies with two dierent
airow direcons, Junos OS raises an alarm, and the status (ALM) LED blinks amber.
3. If the power supply has a protecve plasc wrap, peel and remove the plasc wrap from all four sides
of the power supply.
4. Using both hands, place the power supply in the power supply slot on the FRU panel of the switch
and slide it in unl it is fully seated.
Figure 34: Install an AC PSU in a QFX5240 Switch
95