CHAPTER 25
Replacing Power System Components
•
Replacing a DC Power Supply on page 171
•
Replacing an M7i DC Power Cable on page 175
•
Replacing an M7i AC Power Supply on page 177
•
Replacing an M7i AC Power Cord on page 181
Replacing a DC Power Supply
A DC-powered router has one or two load-sharing, redundant DC power supplies that
install into the rear of the router as shown in Figure 6 on page 12. Each power supply is
hot-removable and hot-insertable, as described in “M7i Field-Replaceable Units (FRUs)”
on page 135. When one power supply fails or is powered down, the remaining power
supplies automatically assume the entire electrical load for the router. For more
information about DC power supplies, see “M7i DC Power Supply” on page 61.
To replace a DC power supply, perform the following procedures:
•
Removing a DC Power Supply on page 171
•
Installing a DC Power Supply on page 173
Removing a DC Power Supply
Before removing a DC power supply from an M7i router with only one power supply, you
must power off the router. See “Powering Off the M7i Router” on page 126. The DC power
supplies are located at the bottom rear of the chassis, as shown in Figure 6 on page 12.
Each DC power supply weighs approximately 7 lb (3.2 kg).
CAUTION: Do not leave a power supply slot empty for more than a short time
while the router is operational. The power supply must remain in the chassis
for proper airflow.
171Copyright © 2019, Juniper Networks, Inc.
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