CHAPTER 4
Power Supplies
•
AC Power Supply in EX4550 Switches on page 41
•
AC Power Supply LEDs in EX4550 Switches on page 43
•
DC Power Supply in EX4550 Switches on page 44
•
DC Power Supply LEDs in EX4550 Switches on page 46
AC Power Supply in EX4550 Switches
The AC power supply in EX4550 switches is a hot-insertable and hot-removable
field-replaceable unit (FRU): You can install it without powering off the switch or
disrupting the switching function.
All the EX4550 switches that are powered by AC power supplies, except the
EX4550-32F-S switches are shipped with one AC power supply pre-installed in the rear
panel of the switches. EX4550-32F-S switches are not shipped with pre-installed power
supplies; you must order them separately.
This topic describes the AC power supplies.
The AC power supply in EX4550 switches gives an output of 650 W and supports both
low line voltage (100–120 VAC) and high line voltage (200–240 VAC).
Figure 24 on page 41 shows an AC power supply for an EX4550 switch.
Figure 24: AC Power Supply for an EX4550 Switch
g050002
Handle
Ejector
lever
AC appliance
inlet
Cord retainer
The AC power supply in EX4550 switches is a hot-insertable and hot-removable
field-replaceable unit (FRU): You can install it without powering off the switch or
disrupting the switching function.
41Copyright © 2015, Juniper Networks, Inc.
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