Juniper EX4100 Hardware Manual page 64

If the switch is operational while you are replacing fan modules, you must remove only one fan module
at a time. The switch continues to operate for 60 seconds without thermal shutdown while you are
replacing a fan module.
Airflow Direction in EX4100 and EX4100-F Switch Models
Table 11 on page 55 shows the direction of airflow in EX4100 and EX4100-F models as shipped.
Table 11: Airflow Direction in EX4100 and EX4100-F Switch Models
Model Number
•
EX4100-48P
•
EX4100-24P
•
EX4100-48MP
•
EX4100-24MP
•
EX4100-48T
•
EX4100-24T
•
EX4100-48T-DC
•
EX4100-24T-DC
•
EX4100-F-24T
•
EX4100-F-48T
Fan Modules and Power
Supply
The switch ships with two
fan modules and an AC
power supply, each with
the label AIR OUT and a
Juniper Gold handle.
The switch ships with two
fan modules and a DC
power supply, each with a
label AIR OUT and a
Juniper Gold handle.
One built-in fan with AFO
cooling.
Direction of Airflow
Front-to-back—cold air to
cool the chassis enters
through the vents on the
front panel of the chassis,
and hot air exits through
the vents on the rear panel
of the chassis.
Front-to-back—cold air to
cool the chassis enters
through the vents on the
front panel of the chassis,
and hot air exits through
the vents on the rear panel
of the chassis.
Front-to-back—cold air to
cool the chassis enters
through the vents on the
front panel of the chassis,
and hot air exits through
the vents on the rear panel
of the chassis.
55