Cisco 12010 series Maintenance Manual page 28

Removing and Replacing AC and DC Power Subsystem Components
Power Supply and Power Distribution Unit Compatibility
Cisco 12010, Cisco 12410, and Cisco 12810 Router Installation and Configuration Guide
7-28
You cannot mix power supply types within the chassis. If you are
Caution
replacing a 2400 W power supply from an older system with a newer
2800 W power supply, you must replace both power supplies and the
PDUs (see Table
upgrade. Be sure to notify the appropriate personnel that all routing
traffic stops while the upgrade takes place.
Cisco 12010, Cisco 12410, and Cisco 12810 series routers configured
Caution
with non-enhanced fabric and a single power supply and with more
than five Engine5 line-cards may fail to boot during the start-up
procedures. To safeguard against this possibility ensure that the chassis
is configured with two power supplies or configured with the enhanced
fabric.
Cisco 12010, Cisco 12410, and Cisco 12810 series routers are available with
either an AC or DC power supply system. There are currently two types of power
supplies in use for these systems:
Original power supplies (rated at 2400 watts)—Shipped with original systems
•
Enhanced capacity power supplies (rated at 2800 watts)—Ships currently
•
Removal and replacement procedures are the same for either type of power
supply. Because of their capacity and physical differences, you cannot mix
different types of power supplies in the chassis. Power supplies are also referred
to as Power Entry Modules (PEMs).
Enhanced capacity 2800 W PEMs also require upgrades to new Power
Distribution Units (PDUs). You cannot install enhanced capacity PEMs using the
original PDUs. If you plan to replace original PEMs with enhanced PEMs, you
must replace both the PEMs and the PDUs.
Before you attempt to install or replace them, be sure you know the power
supplies and associated PDUs your system has
7-1). You must shut down the router to perform the
(Table
Chapter 7 Maintaining the Router
7-1).
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