Cisco Systems Cisco uBR10012 manual Removing and Replacing AC PEM Modules

Chapter 5 Maintaining the Cisco uBR10012 Router

Removing and Replacing AC PEM Modules

Removing and Replacing AC PEM Modules

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Caution

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Caution

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Note

Note

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.

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 Cisco uBR10012 router supports using either the AC PEM or the DC PEM, but it does not support 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.

For fully redundant power protection, use either an uninterruptible power supply (UPS) or a separate AC-input power source for each AC PEM.

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.

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.

	Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
OL-18259-01		5-21