Cisco Systems manual Cisco uBR10012 Universal Broadband Router Modules, Fan Assembly Module

Chapter 1 Cisco uBR10012 Universal Broadband Router Overview

Cisco uBR10012 Universal Broadband Router Modules

Cisco uBR10012 Universal Broadband Router Modules

The following section describes the modules used in the Cisco uBR10012 router. For a list of field replaceable units (FRUs) used in this chassis, see “Cisco uBR10012 Router FRU Resources”.

Fan Assembly Module

The Cisco uBR10012 router uses a fan assembly module (see Figure 1-6) containing four fans to supply cooling air to the chassis. The fan assembly connects to the chassis through a blind mate connector that plugs into a cable assembly and then into the chassis backplane.

Four internal fans draw cooling air into the front of the chassis and direct it across the internal components. The air is exhausted through openings in the rear of the chassis. The fan assembly module works at two speeds:

•Low speed (with a clean air filter)

•High speed (with a clean air filter)

The operating speed is determined by the temperature of the fan module at the module air outlet. If the temperature at the fan’s outlet reaches 40° C then the blower starts to increase speed. It does not reach high speed, however, until the temperature at the outlet reaches 50° C. Three LEDs indicate the status of the fan assembly. See Table 1-4.

Figure 1-6 Fan Assembly Module

Fan assembly

CISCO
10000	CISCO
	10000
A
UX
	A
	UX
AC
TIV
ITY	A
ETH	CT
ERN	IV
LINK ET	ET ITY
	HER
	LINK NET

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Table 1-4		Fan Assembly LEDs
	LED		Status	Description
	SYSTEM OK		Green	System is functioning normally, all fans are operating
	SINGLE FAN		Yellow	A single fan has failed, system triggers alarms, but the fan assembly is still able to cool
	FAILURE			the chassis—repair or replace the fan assembly as soon as possible.
	MULTI-FAN		Yellow	If two or more fans have failed, or if the temperature inside the chassis rises too high,
	FAILURE			the system automatically shuts down—replace the fan assembly immediately.
				Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
	OL-18259-01				1-13