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Juniper EX4100 User Manual

Juniper EX4100
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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 electrostac discharge (ESD) damage. See
Prevenon of
Electrostac 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 eld-replaceable unit
(FRU) installed in the rear panel of the switch. You can remove and replace the power supply without
powering o the switch or disrupng switch funcons.
CAUTION: DAvoid mixing:
AC and DC power supplies in the same chassis.
Power supplies with dierent direcons for the airow in the same chassis.
Fan modules with dierent direcons for the airow in the same chassis.
Power supplies and fan modules with dierent direcons for the airow in the same
chassis.
NOTE: You must connect each power supply to a dedicated power source. The switch comes
with one power supply preinstalled. Addional 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 Figure 103 on page 188):
1. Ensure that the fan modules installed in the switch have the AIR OUT label on them.
2. Aach 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 ngers or the screwdriver to loosen the
capve screws on the cover panel. Hold the capve 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 connecons, remove the power supply
from the bag.
187

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Juniper EX4100 Specifications

General IconGeneral
ModelEX4100
CategorySwitch
LayerLayer 2/3
Power ConsumptionVaries by model and configuration
PoEOptional
ManagementWeb UI, CLI, SNMP
Operating Temperature0°C to 45°C
Input Voltage100-240V AC
Storage Temperature-40°C to 70°C
Humidity5% to 90% non-condensing
DC Power Input-48V DC
JUNOS OSYes
Security FeaturesACLs
Layer 2 FeaturesVLAN, RSTP, MSTP, LACP
Layer 3 FeaturesStatic routing, OSPF
QoS8 queues per port

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