Juniper Networks 5000 SERIES Manuale Utente

Pagina di 116
Fan Modules
NetScreen-5000 Series 
7
The AC Power Supply
The AC power supply weighs about three pounds. The faceplate contains a power LED, a 
power switch, a male power outlet, and a cooling fan vent.
The figure below shows the NetScreen-5200 AC power supply.
F
AN
 M
ODULES
The NetScreen-5200 has a three-fan module and the NetScreen-5400 has a two-fan 
module. You can access the fan module from the left front side of each chassis.
To remove the NetScreen-5200 fan module, turn the fan knob in the unlock 
position, then gently pull the fan module lever toward you to slide the module 
out.
To remove the NetScreen-5400 fan module, loosen the two thumb screws that 
secure the fan module, then gently slide the module out.
If a fan stops operating due to failure or removal, the system continues to run and 
generates an alarm. When you replace the fan, do not leave the fan tray empty for more 
than two minutes. See 
Fuse
Power LED
Thumbscrew
Power Switch
Male 
Power 
Outlet