Understanding the Cooling System ! 259
Chapter 19: Monitoring the Cooling System
M40e and M160 Router Cooling Systems
The M40e and M160 router cooling system has the following components:
! Air intake vent, air filter, and intake cover—Provide an opening for room air to
enter the router. They are located at the bottom of the chassis front, below the
cable management system, as shown in Figure 113 on page 260. The air filter is
removable and covers the air intake vent, preventing dust and other particles
from entering the cooling system. For maintenance and replacement
instructions, see the M40e or M160 router hardware guide. The nonremovable
air intake cover is located behind the air filter and provides EMC shielding.
! Front cooling subsystem—Cools the FPCs, PICs, and midplane. It includes a fan
tray located behind the cable management system and a large, central impeller
behind the craft interface. For replacement instructions, see the M40e or M160
router hardware guide.
! Rear cooling subsystem—Cools the Switching and Forwarding Modules (SFMs),
host module, Packet Forwarding Engine Clock Generator (PCGs), and power
supplies. It includes one impeller located at the upper right of the chassis rear
and another at the lower left. The upper and lower impellers are not
interchangeable. For replacement instructions, see the M40e or M160 router
hardware guide.
CAUTION: Do not remove the air filter for more than a few minutes while the
router is operating. The fans and impellers are powerful enough to draw in foreign
material, such as bits of wire, through the unfiltered air intake, which could
damage router components.
To Next Page
Loading...
Need help?
General
