Juniper JUNOS - NETWORK OPERATION GUIDE REV1 User Manual

JUNOS Internet Software Network Operations Guide: Hardware
252 ! Understanding the Cooling System
Understanding the Cooling System
Purpose Inspect the router cooling system to ensure that air is flowing through the router to
cool the components installed in the router chassis. If the router temperature
exceeds the critical level, the router automatically shuts down.
What Is the Cooling
System
The cooling system includes the fans and impellers that provide cooling in the
router chassis to keep the components operating at an acceptable temperature.
Table 68 describes the cooling system components for each routing platform.
Table 68: Router Cooling System Components per Routing Platform
The following sections describe the various routing platform cooling systems:
! M5 and M10 Router Cooling Systems on page 253
! M7i Router Cooling System on page 253
! M10i Router Cooling System on page 254
! M20 Router Cooling System on page 255
! M40 Router Cooling System on page 256
! M40e and M160 Router Cooling Systems on page 259
! M320 Router Cooling System on page 261
! T320 Router and T640 Routing Node Cooling Systems on page 263
Power Supply Characteristic
M5/
M10
M7i M10i M20 M40 M40e M160 M320 T320 T640
Fan tray 1
with 4
fans
1
with 4
fans
2
with
8 fans
each
3 front
1 rear
1 1 lower
fan tray
2 front,
1 rear
2 front
1 rear
2 front
1 rear
Power supply integrated fan _ _ _ 2 2 _ Cooled by
air flowing
through
the
chassis
___
Impellers _ _ _ _ 2 pairs 1 central
impeller
1 rear
upper
impeller
1 rear
lower
impeller
1 upper
impeller
2 rear
impellers
___
Fan assemblies _ _ _ _ 3 _ _ _ _ _
Air filter _ _ _ _ 1 1 1 1 front,
1 rear
1 front
1 rear
1 front
1 rear

Juniper JUNOS - NETWORK OPERATION GUIDE REV1 Specifications

General

Brand	Juniper
Model	JUNOS - NETWORK OPERATION GUIDE REV1
Category	Software
Language	English