Power Supplies; Ac Power Supply In An Ex9214 Switch; Ac Power Supply Description; Chapter 4 Power Supplies - Juniper EX9214 Hardware Manual

CHAPTER 4

Power Supplies

AC Power Supply in an EX9214 Switch

AC Power Supply Description

Copyright © 2015, Juniper Networks, Inc.
AC Power Supply in an EX9214 Switch on page 39
AC Power Supply LEDs in an EX9214 Switch on page 41
DC Power Supply in an EX9214 Switch on page 43
DC Power Supply LEDs in an EX9214 Switch on page 45
An EX9214 switch is configurable with two or four AC power supplies. The power supplies
connect to the midplane, which distributes the different output voltages produced by
the power supplies to the switch components, depending on their voltage requirements.
Each power supply is cooled by its own internal cooling system.
CAUTION: EX9214 switches use either AC or DC power supplies. Do not mix
AC and DC power supplies in a switch. The first type of power supply detected
by the switch when it is initially powered on determines the type of power
supply the switch will operate with. All installed power supplies of the other
type are disabled by the switch. If you install a power supply of the other type
while the switch is operating with one type of power supply, the switch
disables the power supply you installed and generates an alarm.
This topic describes the AC power supplies in EX9214 switches.
AC Power Supply Description on page 39
AC Power Supply Configurations on page 41
The AC power supplies in EX9214 switches are hot-insertable and hot-removable
field-replaceable units (FRUs).
You can install either two or four AC power supplies in an EX9214 switch. Power supplies
are installed at the rear of the chassis in slots
power supplies provide full redundancy.
through (left to right). Four
PEM0 PEM3
39