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DC Power Supply in an EX8200 Switch
The DC power supplies in EX8200 switches are hot-removable and hot-insertable
field-replaceable units (FRUs).
NOTE: EX8208 switches support 2000 W DC power supplies.
EX8216 switches support 3000 W DC power supplies.
You can install up to six DC power supplies in an EX8200 switch. Power supplies are
installedatthebottomof thechassisin slotslabeled PSU 0throughPSU5(lefttoright).
See “Slot Numbering for an EX8208 Switch” on page 13 and Slot Numbering for an
EX8216 Switch. All power supplies are accessible from the front of the chassis.
WARNING: The switch is pluggable type A equipment installed in a restricted-access
location. It has a separate protective earthing terminal provided on the chassis. This
separateprotectiveearthingterminalmustbepermanentlyconnectedtoearthground.
NOTE: EX8216switcheshavetwoprotectiveearthingterminalsprovidedonthechassis,
one on the left side of the chassis and the other on the rear of the chassis. Only one of
theseprotectiveearthingterminalsneedstobepermanentlyconnectedtoearthground.
See Chassis Physical Specifications of an EX8216 Switch for the location of the
protective earthing terminals.
NOTE: DC power supplies are shipped only in the redundantconfiguration of EX8200
switches.
See “EX8208 Switch Configurations” on page 6 for details about different EX8208
switch configurations.
See EX8216 Switch Configurations for details about different EX8216 switch
configurations.
EachDCpowersupplyweighsapproximately7lb (3.2kg)and hastwoindependent pairs
of DC input lugs (A: –48V A: RTNand B: – 48V B: RTN ) on the frontof the powersupply.
Each power supply also has an Enable switch, a fan, and four LEDs on the faceplate that
indicate the status of the power supply. See Figure 28 on page 49.
Copyright ©2010,Juniper Networks,Inc.48
CompleteHardwareGuide forEX8208 EthernetSwitches