Removing And Replacing Ac Pem Modules - Cisco Universal Broadband Router uBR10012 Hardware Installation Manual

Chapter 5 Maintaining the Cisco uBR10012 Router
Figure 5-6

Removing and Replacing AC PEM Modules

The Cisco uBR10012 router ships with two AC power entry modules (PEMs). In this redundant system,
(2 power supplies), one AC PEM provides sufficient power for a fully configured chassis. If one AC PEM
fails, the other automatically begins providing power for the entire router, without impacting system
operations. However, even though one AC PEM provides sufficient power for a fully configured
Cisco uBR10012 chassis, the system should not be run for extended periods of time with only one AC
PEM. Always install the replacement AC PEM as soon as possible and order a spare for backup.
For proper airflow, cooling, and safety, do not remove the failed unit until the replacement unit is
Caution
available for installation.
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.
Caution The AC PEMs cannot be used with a 100–120 VAC input power source.
For fully redundant power protection, use either an uninterruptible power supply (UPS) or a separate
Tip
AC-input power source for each AC PEM.
OL-18259-09
Alarm Terminal Block Connections
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MAJOR
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ALARMS
60 VDC
1A MAX
Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
Removing and Replacing AC PEM Modules
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NC COM NO
CRITICAL
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