Juniper EX4500 Hardware Manual page 59

Figure 21: AC Power Supply
AC appliance Power supply
inlet handle
Ejector Power supply
lever LED
Each AC power supply has an ejector lever that holds the power supply in place. The ejector lever locks
into the corresponding hole in the chassis on the left side of the AC appliance inlet. For instructions for
installing the power supply, see
Each AC power supply comes with a power cord retainer that holds the power cord in place. See
Figure 22 on page 59. The power cord retainer has a clip and an adjustment nut. The L-shaped ends of
the retainer clip hook into the bracket holes on each side of the AC appliance inlet. The adjustment nut
holds the power cord in the correct position. For instructions for installing the power cord retainer, see
"Installing an AC Power Supply in an EX4500 Switch" on page
Figure 22: Power Cord Retainer for an AC Power Supply
Retainer
clip
Adjustment
nut
Each power supply has its own fan and is cooled by its own internal cooling system. The airflow for a power
supply is either from the front of the power supply to the back or from the back of the power supply to
the front depending on the switch model you purchase.
The color of the ejector lever on the power supply indicates the direction of airflow of the power supply.
Green—Front-to-back airflow
Orange—Back-to-front airflow
The color of the power supply's ejector lever must match the color of the intake or exhaust label visible
through the vents of the installed fan tray. The color match indicates that the direction of airflow through
the fan tray matches the direction of airflow through the power supply.
"Installing an AC Power Supply in an EX4500 Switch" on page
201.
59
201.