Related
Documentation
M120 Router Power Requirements on page 237
•
•
Connecting Power to an AC-Powered M120 Router on page 89
•
Maintaining the M120 Power Supplies on page 115
•
Replacing an M120 AC Power Supply on page 173
•
M120 AC Power, Connection, and Power Cord Specifications on page 231
M120 DC Power Supply Description
In the DC power configuration, the router contains two DC power supplies (see Figure 15
on page 31), located in the right rear of the chassis in slots
PEM0
and
PEM1
(left to right).
A single DC power supply provides sufficient power for a fully configured router.
Two DC power supplies share power almost equally within a fully populated system. If
either power supply fails, the remaining power supply takes over without interruption.
Each DC power supply has a single DC input (–48 VDC and return) that requires a
dedicated 60 A (–48 VDC) circuit breaker for the maximum router hardware configuration.
.
Figure 15: M120 DC Power Supply
Related
Documentation
M120 DC Power Supply LEDs on page 32
•
•
M120 Router Power Requirements on page 237
•
Connecting Power to a DC-Powered M120 Router on page 91
•
Maintaining the M120 Power Supplies on page 115
•
Replacing an M120 DC Power Supply on page 177
•
M120 DC Power, Connection, and Cable Specifications on page 234
31
Copyright © 2010, Juniper Networks, Inc.
Chapter 2: M120 Hardware Components
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