M320 Power System Overview; M320 Power System Description; M320 Ac Power Supply - Juniper M320 Hardware Manual

Related
Documentation

M320 Power System Overview

M320 Power System Description

Related
Documentation

M320 AC Power Supply

Copyright © 2010, Juniper Networks, Inc.
M320 Flexible PIC Concentrator (FPC) Description on page 11
M320 Craft Interface Description on page 28
M320 Alarm Relay Contacts
Troubleshooting the M320 FPCs on page 131
M320 Power System Description on page 33
M320 AC Power Supply on page 33
M320 DC Power Supply on page 34
M320 Power Supply LEDs on page 35
M320 Fuses on page 36
M320 Fuse Specifications on page 36
The M320 router uses either AC or DC power supplies. The router is configurable with
two, three, or four AC power supplies or two or four DC power supplies. The power supplies
connect to the midplane, which distributes the different output voltages produced by
the power supplies to the router components, depending on their voltage requirements.
All power supplies are hot-removable and hot-insertable. Each power supply is cooled
by its own internal cooling system.
CAUTION: Mixing AC and DC power supplies is not supported and prevents
the router from powering on.
Grounding the M320 Router on page 95
M320 Power Requirements on page 250
Troubleshooting the M320 Power System on page 132
In the AC power configuration, the router contains two to four load-sharing AC power
supplies (see Figure 17 on page 34), which are located at the lower rear of the chassis in
slots through
PEM0 PEM3
functional power supplies to operate.
To provide power redundancy, you can upgrade the number of AC power supplies from
two to three or from three to four. Each AC power supply provides power to all
components in the router, as opposed to the DC power configuration (see "M320 DC
Power Supply" on page 34 for more information). Three AC power supplies provide full
(top to bottom). The router requires a minimum of two fully
Chapter 2: M320 Hardware Components
33