Install A Dc Power Supply In An Ex4100 Switch - Juniper EX4100 Hardware Manual

Install a DC Power Supply in an EX4100 Switch

Before you install a DC power supply in the switch:
• Ensure that 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
Each DC power supply in an EX4100 switch is a hot-removable and hot-insertable field-replaceable unit
(FRU) installed in the rear panel of the switch. You can remove and replace the power supply without
powering off the switch or disrupting switch functions.
CAUTION: DAvoid mixing:
• AC and DC power supplies in the same chassis.
• Power supplies with different directions for the airflow in the same chassis.
• Fan modules with different directions for the airflow in the same chassis.
• Power supplies and fan modules with different directions for the airflow in the same
chassis.
NOTE: You must connect each power supply to a dedicated power source. The switch comes
with one power supply preinstalled. Additional power supplies are separately orderable. You can
install up to two power supplies in the switch.
To install a DC power supply in the switch (see
1. Ensure that the fan modules installed in the switch have the AIR OUT label on them.
2. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the
chassis.
3. If the power supply slot has a cover panel on it, use your fingers or the screwdriver to loosen the
captive screws on the cover panel. Hold the captive screw and gently pull it outward to remove the
cover panel. Save the cover panel for later use.
4. Taking care not to touch power supply pins, leads, or solder connections, remove the power supply
from the bag.
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Figure 103 on page
Prevention of
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