Poe Power Budget And Ac Power Supplies; Figure 19: Dc Power Supply; Table 12: Power Supply Rating And Poe Power Budget For Ex4200 Switch - Juniper EX4200-24T Hardware Manual

EX4200 Switch Hardware Guide

PoE Power Budget and AC Power Supplies

Table 12: Power Supply Rating and PoE Power Budget for EX4200 Switch Models
Switch Model Number
EX4200-24T
EX4200-48T
36

Figure 19: DC Power Supply

To avoid electrical injury, follow instructions in Installing a Power Supply in an EX3200
Switch and Removing a Power Supply from an EX3200 Switch or
in an EX4200 Switch" on page 183
on page 185 carefully.
The PoE power budget for a PoE switch model is determined by the capacity of its power
supply. For EX4200 switches, the capacity of the power supply provided with a PoE
model is sufficient to supply each PoE-capable port with up to 15.4 W in compliance with
the IEEE 802.3af PoE standard.
the associated PoE power budgets for EX4200 switch models that support PoE.
Starting with Junos OS Release 11.1, EX4200 switches support enhanced PoE, a Juniper
Networks extension to the IEEE 302.3af PoE standard. Enhanced PoE permits up to 18.6
W per PoE port. Because the power supply provided with a switch is designed to supply
a maximum of 15.4 W per PoE port, if you connect a powered device that draws more
than 15.4 W, the PoE power budget might not be sufficient to supply a full 15.4 W to the
remaining PoE ports.
NOTE: Switches upgraded to Junos OS Release 11.1 from a previous release
require a separate upgrade of the PoE controller software to enable enhanced
PoE support.
EX4200-24PX and EX4200-48PX switches support PoE+, the IEEE 802.3at PoE standard,
and permit up to 30 W per port.
Number of PoE-enabled
Ports
8
8
or "Removing a Power Supply from an EX4200 Switch"
Table 12 on page 36 lists the power supply ratings, and
Power Supply Rating
320 W
320 W
Copyright © 2017, Juniper Networks, Inc.
"Installing a Power Supply
PoE Power Budget
130 W
130 W