Nonisolated Dc Power Supply; Isolated Dc Power Supply; Components Powered By Each Power Supply Slot; Table 50: Components Powered By Each Dc Power Supply Slot - Juniper M320 Hardware Manual

Nonisolated DC Power Supply

Isolated DC Power Supply

Components Powered by Each Power Supply Slot

Copyright © 2015, Juniper Networks, Inc.
NOTE: Except during upgrade, all DC power supplies installed in the chassis
must be the same model number, either all isolated or all nonisolated DC
power supplies. Using both isolated and nonisolated DC power supplies
during normal operations prevents load sharing.
Nonisolated DC Power Supply on page 75
Isolated DC Power Supply on page 75
Components Powered by Each Power Supply Slot on page 75
DC Power Supply Load Sharing and Fault Tolerance on page 76
Each nonisolated power supply consists of a single DC input (-48 VDC and return), a
circuit breaker, a fan (each power supply is cooled by its own internal cooling system),
and LEDs to monitor the status of the power supply. Each nonisolated power supply
weighs approximately 10 lb (4.5 kg).
Each isolated power supply consists of a single DC input (-48 VDC and return), a circuit
breaker, a fan (each power supply is cooled by its own internal cooling system), and LEDs
to monitor the status of the power supply. Each isolated power supply weighs
approximately 10 lb (4.5 kg).
NOTE: The Isolated DC power supply is designed to be more resilient to power
irregularity such as noise or surge in power environment.
The DC power supplies in the slots indicated provide power to the components listed in
Table 50 on page 75.

Table 50: Components Powered by Each DC Power Supply Slot

Slot
and
PEM0 PEM2
and
PEM1 PEM3
Chapter 7: Power System Components and Descriptions
Provide Power to These Components
FPCs in slots through
FPC3 FPC7
FPCs in slots through
FPC0 FPC2
and fan trays.
, SIBs, CBs, and Routing Engines,
75