Juniper EX4300 Hardware Manual page 247

Copyright © 2015, Juniper Networks, Inc.
Fan modules with different airflow labels (
in the same chassis.
Power supplies and fan modules with different airflow labels (
and AIR OUT (AFO)
Before you install a DC power supply in the switch:
Ensure you understand how to prevent electrostatic discharge (ESD) damage. See
"Prevention of Electrostatic Discharge Damage" on page
Ensure that you have the following parts and tools available to install a DC power supply
in the switch chassis:
ESD grounding strap
Phillips (+) screwdriver, number 2
NOTE: Each power supply must be connected to a dedicated power source
outlet.
The power supply slots are at the right end of the rear panel on 24-port and
48-port switches, and at the left end on 32-port switches.
shows how to install a DC power supply in 24-port or 48-port switches. The
procedure is the same for 32-port switches.
To install a DC power supply in the switch:
Ensure that you have the correct power supply. The label
1.
(AFO) on the power supply must match the label
the installed fan module.
Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD
2.
point on the chassis.
If the power supply slot has a cover panel on it, loosen the captive screws on the cover
3.
panel by using your fingers or the screwdriver. Hold the captive screw and gently pull
it outward to remove the cover panel. Save the cover panel for later use.
Taking care not to touch power supply pins, leads, or solder connections, remove the
4.
power supply from the bag.
Using both hands, place the power supply in the power supply slot on the rear panel
5.
of the switch and slide it in until it is fully seated and the ejector lever fits into place.
Chapter 16: Replacing Power Supply
AIR IN (AFI)
) in the same chassis.
AIR IN (AFI)
and AIR OUT (AFO)
AIR IN (AFI)
299.
Figure 72 on page 226
or
AIR IN (AFI) AIR OUT
or AIR OUT (AFO) on
225
)