Juniper EX4300 Hardware Guide

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Ensure that you have taken the necessary precautions to prevent electrostatic discharge
(ESD) damage (see “Prevention of Electrostatic Discharge Damage” on page 313).
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Ensure that you have connected the device chassis to earth ground.
CAUTION: Before you connect power to the switch, a licensed electrician
must attach a cable lug to the grounding cable that you supply. A cable
with an incorrectly attached lug can damage the switch (for example, by
causing a short circuit).
To meet safety and electromagnetic interference (EMI) requirements and
to ensure proper operation, you must connect the EX4300 switch 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 “Connecting Earth Ground to
an EX Series Switch” on page 179. An EX4300 switch gains additional
grounding when you plug the power supply in the switch into a grounded
AC power outlet by using the AC power cord appropriate for your
geographical location (see “AC Power Cord Specifications for an EX4300
Switch” on page 100).
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Install the power supply in the chassis. For instructions on installing a power supply in
an EX4300 switch, see “Installing an ACPower Supply in an EX4300 Switch” on page 233.
Ensure that you have the following parts and tools available:
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A power cord appropriate for your geographical location (provided)
NOTE: Each power supply must be connected to a dedicated power source
outlet.
To connect AC power to an EX4300 switch:
1. Attach the grounding strap to your bare wrist and to a site ESD point.
NOTE: 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.Figure 50 on page 187 shows how to connect an AC power cord
to an AC power supply installed on 24-port or 48-port EX4300 switches.
The procedure is the same for 32-port EX4300 switches.
2. Ensure that the power supplies are fully inserted in the chassis and the latches are
secure. If only one power supply is installed, ensure that a cover panel is installed over
the second power supply slot.
Copyright © 2017, Juniper Networks, Inc.186
EX4300 Switch Hardware Guide

Juniper EX4300 Specifications

General

Model	EX4300
Virtual Chassis	Yes, up to 10 members
Layer 3 Routing	Yes
10GBASE SFP+ Ports	4
Jumbo Frames	9216 bytes
MAC Address Table Size	32, 000
Operating System	Junos OS
Uplink Ports	4 x 10GBASE SFP+
Power Supply	AC or DC options
Operating Temperature	0°C to 45°C (32°F to 113°F)
Input Voltage	100-240V AC
Operating Relative Humidity	5 to 90% RH, non-condensing
Management Options	CLI, Web UI, Junos Space
Redundancy	Yes, power supply and fans
Storage Temperature	-40°F to 158°F (-40°C to 70°C)
Ports	24 or 48