Installing An Ac Power Supply In An Ex4300 Switch - Juniper EX4300 Series Hardware Manual

Installing an AC Power Supply in an EX4300 Switch

Before you install an AC power supply in the switch:
• Ensure you understand how to prevent electrostatic discharge (ESD) damage. See
Electrostatic Discharge Damage
Ensure that you have the following parts and tools available to install the power supply:
• ESD grounding strap
• Phillips (+) screwdriver, number 2
The AC power supply in EX4300 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 it 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.
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.
power supply in 24-port or 48-port switches. The procedure is the same for 32-port switches.
To install an AC power supply in the switch:
1. Ensure that you have the correct power supply. The label AIR IN (AFI) or AIR OUT (AFO) on the
power supply must match the label AIR IN (AFI) or AIR OUT (AFO) on the installed fan module.
2. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the
chassis.
.
Figure 89 on page 299
Prevention of
shows how to install an AC
298