Juniper EX4100 User Manual

To prevent electrical injury while installing or removing DC power supplies, carefully follow instrucons
in "Install a DC Power Supply in an EX4100 Switch" on page 187 and "Remove a DC Power Supply from
an EX4100 Switch" on page 188.
Specicaons of the DC Power Supplies Used in EX4100 Switches
Table 23 on page 80 provides the power supply specicaons of the 150 W DC power supplies.
Table 23: Specicaons of the 150 W DC Power Supplies Used in EX4100 Switches
Item Specicaon
DC input voltage Rated operang voltage: –48 VDC to –60 VDC
DC input current rang 4.7A - 2.8 A
Output power 150 W
DC Power Supply Airow
Each power supply has its own fan and internal cooling system. Each power supply has a label AIR OUT
or AIR IN on the faceplate of the power supply that indicates the direcon of airow through the power
supply. Table 24 on page 80 lists the DC power supply models and the direcon of airow
throughthem.
Table 24:
Airow Direcon in DC Power Supply Models for EX4100 Switches
Model Label on Power Supply Direcon of Airow
JPSU-150-DC-AFO AIR OUT Front to back: Air to cool the chassis
enters through the vents on the
front panel of the chassis. Hot air
exits through the vents on the rear
panel of the chassis.
80

Juniper EX4100 Specifications

General

Brand	Juniper
Model	EX4100
Category	Switch
Language	English