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Feature Overview
Feature Overview
The Cisco uBR10012 router can optionally ship with two AC power entry modules (PEMs) that provide
a redundant power supply to the system. One AC PEM can provide sufficient power for a fully
configured chassis, so that if one AC PEM fails, the other automatically begins providing power for the
entire router, without impacting system operations.
Note
You should be using Cisco IOS Release 12.2(4)XF1, Cisco IOS Release 12.2(4)BC1a, or a later release
when using the AC PEM. If using an earlier release, the show environment command will not correctly
identify the AC PEM's error messages.
The Cisco uBR10012 router supports using either the AC PEM or the DC PEM, but it does not support
Caution
mixing AC and DC PEMs. Both PEMs must be either AC PEMs or DC PEMs.
The AC PEMs use standard 200–240 VAC (50/60 Hz) input power obtained through power receptacles
on the front panel of each PEM. The two AC PEMs convert the AC power to provide filtered, redundant,
and load shared DC power to the Cisco uBR10012 chassis.
The AC PEMs cannot be used with a 100–120 VAC input power source.
Caution
For fully redundant power protection, use either an uninterruptible power supply (UPS) or a separate
Tips
AC-input power source for each AC PEM.
This document contains the procedures to replace an existing second (redundant) AC PEM and to replace
both AC PEMs.
Note
You do not need to shut down the Cisco uBR10012 router to replace a redundant AC PEM. If you are
replacing both AC PEMs, you can replace one, bring it online, and then replace the other one to avoid
shutting down the system.
Although one AC PEM can provide sufficient power for a fully configured Cisco uBR10012 chassis, the
Caution
system should not be run for an extended period of time with only one AC PEM. If an AC PEM fails,
order and install a replacement AC PEM as soon as possible. The product order number for a
replacement AC PEM is UBR10-PWR-AC=. For proper airflow, cooling, and safety, do not remove the
failed unit until the replacement unit is available for installation.
The output of the show inventory command does not display the serial number for the AC PEM
Note
(UBR10-PWR-AC). Visually inspect the serial number label printed on the AC PEM to locate the serial
number.
AC Power Entry Module for the Cisco uBR10012 Universal Broadband Router
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