Dc Power Supply Specifications For Ex4300 Switches; Calculating The Ex Series Switch Fiber-Optic Cable Power Budget; Table 66: Dc Power Supply Specifications For An Ex4300 Switch - Juniper EX4300 Hardware Manual

EX4300 Switch Hardware Guide
Related
Documentation

DC Power Supply Specifications for EX4300 Switches

Table 66: DC Power Supply Specifications for an EX4300 Switch

Item
DC input voltage
DC input current rating
Output power
Related
Documentation

Calculating the EX Series Switch Fiber-Optic Cable Power Budget

102
CAUTION: The AC power cord for the EX4300 switch is intended for use with
this switch only. Do not use the cord with any other product.
CAUTION: Power cords must not block access to switch components.
AC Power Supply in EX4300 Switches on page 47
General Safety Guidelines and Warnings on page 265
General Electrical Safety Guidelines and Warnings on page 297
Prevention of Electrostatic Discharge Damage on page 299
Connecting AC Power to an EX4300 Switch on page 173
Table 66 on page 102 lists the power supply specifications for a DC power supply used in
an EX4300 switch.
Specifications
Nominal operating voltage: –48 VDC
Operating voltage range: –48 VDC through –60 VDC
4 A maximum at nominal operating voltage (–48 VDC)
550 W
DC Power Supply in EX4300 Switches on page 55
DC Power Supply LEDs in EX4300 Switches on page 59
Calculate the link's power budget when planning fiber-optic cable layout and distances
to ensure that fiber-optic connections have sufficient power for correct operation. The
power budget is the maximum amount of power the link can transmit. When you calculate
the power budget, you use a worst-case analysis to provide a margin of error, even though
all the parts of an actual system do not operate at the worst-case levels.
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