Replacing M120 Power System Components; Replacing An M120 Ac Power Supply; Figure 86: Installing A M120 Xenpak Module - Juniper Networks Hardware Manual

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Replacing M120 Power System Components

Replacing an M120 AC Power Supply

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Figure 86: Installing a M120 XENPAK Module

M120 Router Chassis Description on page 6
Overview of Troubleshooting Resources for the M120 Router on page 117
To replace a power system component, perform the following procedures:
Replacing an M120 AC Power Supply on page 173
Replacing an M120 DC Power Supply on page 177
Replacing an M120 AC Power Supply Cord on page 182
Replacing an M120 DC Power Supply Cable on page 183
In the AC power configuration, the router has two AC power supplies (see Figure 14 on
page 30), located at the rear of the chassis in slots
AC power supply provides power to all components in the router. The AC power supplies
are fully redundant and current is shared almost equally in a fully configured system. In
a fully configured router, if one power supply fails or is removed, the remaining power
supply instantly assumes the entire electrical load.
Each power supply (AC or DC) is hot-insertable and hot-removable.
Chapter 14: Replacing M120 Hardware Components
PEM0 and PEM1 (left to right). Each
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