Cisco Router XR 12416 Installation Manual page 11

Chapter 1 Product Overview
In the DC-input power configuration:
•
•
Figure 1-7
A router configured for source DC operation must be operated with 4 DC-input
Caution
PEMs installed at all times for electromagnetic compatibility (EMC).
DC PEMs support online insertion and removal (OIR) which means that you can
Note
remove and replace one PEM in each load zone (A1 or B1; A2 or B2) while the
system remains powered on.
DC power to the router is provided from cables from a DC power source that are
connected to threaded terminal studs on the back of the DC-input power shelf as
shown in
OL-17440-01
Modules A1 and B1 provide redundant power for system load zone 1 (the
upper blower module and the upper card cage).
Modules A2 and B2 provide redundant power for system load zone 2 (the
switch fabric card cage, the lower card cage, and the lower blower module).
DC-Input Power Shelf
PWR OK
PWR OK
PWR OK
FAULT
FAULT
FAULT
TEMP
TEMP
TEMP
Figure 1-8.
Cisco XR 12416 and Cisco XR 12816 Router Chassis Installation Guide
Physical and Functional Description of Router
PWR OK
FAULT
TEMP
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