Figure 135: M320 Router Power Supplies - Juniper M Series Monitoring And Troubleshooting Manual

M Series and T Series Routers Monitoring and Troubleshooting Guide

Figure 135: M320 Router Power Supplies

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The M320 router supports four power supplies. The AC power supplies are fully redundant.
If one power supply fails or is removed, the remaining power supplies instantly assume
the entire electrical load. Three power supplies can provide full power for as long as the
router is operational.
In the M320 router DC power supply configuration, the router has four DC power supplies,
located at the lower rear of the chassis in slots
The DC power supplies in slots
the Flexible PIC Concentrators (FPCs) in slots
in slots PEM1 and PEM3 are load-sharing and provide power to the FPCs in slots
through , Switch Interface Boards (SIBs), Control Boards, and Routing Engines. All
FPC2
DC power supplies provide power to the fan trays.
NOTE: The DC power supplies in slots
dedicated power feeds derived from feed A, and the DC power supplies in
slots and
PEM2
from feed B. This configuration provides the commonly deployed
redundancy for the system.
NOTE: Each power supply must be connected to a dedicated AC power feed
and a dedicated 15 A (250 VAC) circuit breaker.
PEM0
and are load-sharing and provide power to
PEM0 PEM2
through
FPC3
PEM0
must be powered by dedicated power feeds derived
PEM3
through PEM3 (top to bottom).
. The DC power supplies
FPC7
and PEM1 must be powered by
A/B
Copyright © 2012, Juniper Networks, Inc.
FPC0
feed