CHAPTER 3
Cooling System Components and
Descriptions
•
Cooling System and Airflow in an ACX5000 Router on page 33
Cooling System and Airflow in an ACX5000 Router
The cooling system in ACX5000 routers consists of fan modules and a single fan in each
power supply. The number of fan modules vary depending whether the size of the router
is 1 U or 2 U high. All routers can be set up to work in the following airflow direction:
•
Airflow Out (AFO)—Air comes into the router through the vents in the front panel.
This topic describes:
•
Fan Modules on page 33
•
Fan Module Status on page 36
Fan Modules
The fan modules in ACX5000 routers are hot-insertable and hot-removable
field-replaceable units (FRUs). These fan modules are designed for air to enter from the
ports to the FRU–Airflow Out. The fan modules are installed in the fan module slots on
the management panel of the router next to the power supplies.
Both the 1 U and 2 U versions of ACX5000 fan modules have a similar design with different
dimensions. The 1 U ACX5000 routers have 5 fan modules numbered 0 through 4 from
left to right, where the 2 U, ACX5096 has 3 fan modules numbered 0 through 2. On all
ACX5000 routers, each fan module slot has a fan icon next to it.
Figure 16 on page 34 shows the 1 U fan module and Figure 17 on page 34 shows the 2 U
fan module.
33Copyright © 2015, Juniper Networks, Inc.
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