Dc Power Supply In An Ex8200 Switch - Juniper EX8208 Hardware Manual

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 installed at the bottom
of the chassis in slots labeled PSU 0 through PSU 5 (left to right). See
Switch" on page 40 and Slot Numbering for an EX8216 Switch. All power supplies are accessible from the
front of the chassis.
WARNING:
location. It has a separate protective earthing terminal provided on the chassis. This
separate protective earthing terminal must be permanently connected to earth ground.
NOTE: EX8216 switches have two protective earthing terminals provided on the chassis, one
on the left side of the chassis and the other on the rear of the chassis. Only one of these protective
earthing terminals needs to be permanently connected to earth ground. 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 redundant configuration of EX8200 switches.
See "EX8208 Switch Configurations" on page 27
configurations.
See EX8216 Switch Configurations for details about different EX8216 switch configurations.
Each DC power supply weighs approximately 7 lb (3.2 kg) and has two independent pairs of DC input lugs
(A: –48V A: RTN and B: – 48V B: RTN ) on the front of the power supply. 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 13 on page 71.
The switch is pluggable type A equipment installed in a restricted-access
"Slot Numbering for an EX8208
for details about different EX8208 switch
70