Four-Input 240-A Dc Power Supply Inputs; Tolerance - Juniper T1600 Hardware Manual

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Copyright © 2010, Juniper Networks, Inc.
Figure 38: Four-Input 240-A DC Power Supply
LEDs Circuit breakers

Four-Input 240-A DC Power Supply Inputs

The four-input 240-A DC power supply inputs are labeled
and INPUT 3 from top to bottom. Each input consists of –48 VDC and return, each with
its own 60-A circuit breaker.
Table 22 on page 63 describes which components are powered by each input.
Table 22: Components Powered by Each Four-Input 240-A DC Power
Supply Input
Input
INPUT 0
INPUT 1
INPUT 2
INPUT 3
Four-Input 240-A DC Power Supply Load Sharing and Fault Tolerance
When the router is operating normally and both power supplies are switched on, load
sharing between them occurs automatically. When one power supply fails or is turned
off, the other power supply immediately assumes the entire electrical load for the system.
A single power supply can provide full power for as long as the router is operational. If
any of the four inputs fails, the router shuts down, and the other power supply assumes
the electrical load for all four inputs.
T1600 Power System Description on page 59
T1600 Four-Input 240-A DC Power Supply LEDs on page 64
T1600 DC Power Requirements on page 352
Troubleshooting the T1600 Power System on page 185
Chapter 3: T1600 Router Hardware Components Overview
Components
SIBs, control boards, Routing Engines, and half the system fan power
FPCs in slots FPC0 and FPC1 and half the system fan power
FPCs in slots FPC2 through FPC4
FPCs in slots FPC5 through FPC7
, , and
INPUT 0 INPUT 1 INPUT 2
,
63