Blower Module; Figure 1-11 Blower Module (Shown Without The Blower Module Front Cover) - Cisco GSR12/60 - 12012 Router -AnyLAN, SONET/SDH Installation And Configuration Manual

Physical and Functional Overviews

Blower Module

The Cisco 12012 has two blower modules; one is located above the upper card cage, and
the second is located below the power supply bay. (See Figure 1-1.) The two blower
modules maintain acceptable operating temperatures for the internal components by
drawing cooling air through both card cages and the power supply bay.
The blower module is a sheet metal enclosure containing three fans, a fan controller card,
and two faceplate LEDs. (See Figure 1-11.) The top and bottom blower modules are
identical and are interchangeable. Both blower modules have snap-on plastic front covers
mounted over the blower module faceplates. Two blower module LEDs are visible through
the front covers.
Figure 1-11
Blower module
The blower modules draw room air in through an air filter on the front of the lower card
cage (See Figure 1-12). The top blower module draws the air up through the upper card
cage and out through exhaust vents on the back of the blower module; the bottom blower
module draws the air down through the lower card cage and power supply bay and out
through exhaust vents on the back of the blower module.
1-34 Cisco 12012 Gigabit Switch Router Installation and Configuration Guide
Blower Module (Shown without the Blower Module Front Cover)
Snap fasteners
(4 places)
LEDs
Captive screws