Connecting Dc Power To An Ex4300 Switch - Juniper EX4300 Hardware Manual

EX4300 Switch Hardware Guide

Connecting DC Power to an EX4300 Switch

176
EX4300 switches can be configured with up to two DC power supplies. After you install
at least one power supply, you can connect power to the switch.
CAUTION: Do not mix:
AC and DC power supplies in the same chassis
Power supplies with different airflow labels (
) in the same chassis.
(AFO)
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 begin connecting DC power to an EX4300 switch:
Ensure that you have taken the necessary precautions to prevent electrostatic discharge
(ESD) damage (see "Prevention of Electrostatic Discharge Damage" on page
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
connecting earth ground, see
Switch" on page
Install the power supply in the chassis. For instructions on installing a DC power supply
in an EX4300 switch, see
page 224.
) in the same chassis.
"Connecting Earth Ground to an EX Series
167.
"Installing a DC Power Supply in an EX4300 Switch" on
and
AIR IN (AFI) AIR OUT
and
AIR IN (AFI) AIR OUT (AFO)
AIR IN (AFI)
299).
Copyright © 2015, Juniper Networks, Inc.
)