Juniper EX4550 - Connecting DC Power to an EX4550 Switch

7. Insert the power cord plug into an AC power source outlet.
8. If the AC power source outlet has a power switch, set it to the on (|) position.
9. Repeat these steps for the second AC power supply, if one is installed.
10. Verify that the AC and DC LEDs on each power supply are lit green.
If the fault status (!) LED is lit yellow, remove power from the power supply, and
replace the power supply (see “Removing an AC Power Supply from an EX4550
Switch” on page 204). Do not remove the power supply until you have a replacement
power supply ready: the power supplies or a blank cover panel must be installed in
the switch to ensure proper airflow.
CAUTION: We recommend that you install either a replacement power
supply or a cover panel in the empty power supply slot to avoid chassis
overheating and dust accumulation.
Related
Documentation
AC Power Supply in EX4550 Switches on page 41•
• AC Power Supply LEDs in EX4550 Switches on page 43
Connecting DC Power to an EX4550 Switch
The power supply in an EX4550 switch is a hot-removable and hot-insertable
field-replaceable unit (FRU): You can remove and replace it without powering off the
switch or disrupting switch functions.
Before you begin connecting DC power to an EX4550 switch:
•
Ensure that you have taken the necessary precautions to prevent electrostatic discharge
(ESD) damage (see “Prevention of Electrostatic Discharge Damage” on page 287).
•
Ensure that you have connected the switch chassis to earth ground.
CAUTION: Ensure that you install the power supply module first and then
install the DC input wire, before closing input breaker ON.
CAUTION: Before you connect power to the device, a licensed electrician
must attach a cable lug to the grounding and power cables that you supply.
A cable with an incorrectly attached lug can damage the device (for
example, by causing a short circuit).
To meet safety and electromagnetic interference (EMI) requirements and
to ensure proper operation, you must connect the chassis to earth ground
before you connect it to power. For installations that require a separate
grounding conductor to the chassis, use the protective earthing terminal
on the switch chassis to connect to the earth ground. For instructions on
165Copyright © 2015, Juniper Networks, Inc.
Chapter 13: Connecting the Switch to Power