Cisco Systems Cisco uBR10012 manual AC Power Entry Modules, DC PEM LEDs, Fault, Miswire

Chapter 1 Cisco uBR10012 Universal Broadband Router Overview

Cisco uBR10012 Universal Broadband Router Modules

DC PEM LEDs

Table 1-6describes the LEDs on the DC PEM.

Table 1-6	Cisco DC PEM LEDs
LED	Status	Description
POWER	Green	The DC PEM is powered on, receiving power from the external DC power source, and is
		providing power to the Cisco uBR10012 chassis (normal operation).
FAULT	Yellow	External DC power is being received by the DC PEM but that the PEM is not supplying power
		to the chassis, typically because the PEM’s power switch is turned off.
		If the power switch is in the ON position, and the Fault LED lights, the PEM is not operating
		correctly
MISWIRE	Yellow	–48/–60 VDC and RTN (+) wires are reversed (see the “Powering On the System” section on
		page 3-60).

AC Power Entry Modules

The Cisco uBR10012 router ships with two AC power entry modules (AC 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 must use 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.

Caution The Cisco uBR10012 router 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.

Caution The AC PEMs cannot be used with a 100–120 VAC input power source.

Tip 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 system should not be run for an extended period of time with only one AC PEM. If an AC PEM fails, install a replacement AC PEM as soon as possible. For proper airflow (see Figure 1-15), cooling, and safety, do not remove the failed unit until the replacement unit is available for installation.

	Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
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