Juniper EX4100, Hardware Manual, Page: 64 / 283

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 Fan Modules and Power
Supply Direction of Airflow
•
EX4100-48P
•
EX4100-24P
•
EX4100-48MP
•
EX4100-24MP
•
EX4100-48T
•
EX4100-24T
The switch ships with two
fan modules and an AC
power supply, each with
the label AIR OUT and a
Juniper Gold handle. 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.
•
EX4100-48T-DC
•
EX4100-24T-DC
The switch ships with two
fan modules and a DC
power supply, each with a
label AIR OUT and a
Juniper Gold handle. 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.
•
EX4100-F-24T
•
EX4100-F-48T
One built-in fan with AFO
cooling. 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