T640 Four-Input 240-A Dc Power Supply Description; Four-Input 240-A Dc Power Supply; Four-Input 240-A Dc Power Supply Inputs; Figure 39: Four-Input 240-A Dc Power Supply - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide

T640 Four-Input 240-A DC Power Supply Description

Four-Input 240-A DC Power Supply

Four-Input 240-A DC Power Supply Inputs

102
Four-Input 240-A DC Power Supply on page 102
Four-Input 240-A DC Power Supply Inputs on page 102
Four-Input 240-A DC Power Supply Load Sharing and Fault Tolerance on page 103
Each four-input 240-A DC power supply weighs approximately 26.6 lb (12.0 kg) and
consists of four inputs, four 60-A circuit breakers, a fan, and LEDs to monitor the status
of the power supply. Figure 39 on page 102

Figure 39: Four-Input 240-A DC Power Supply

Circuit breakers
LEDs
The four-input 240-A DC power supply inputs are labeled
and from top to bottom. Each input consists of –48 VDC and return, each with
INPUT 3
its own 60-A circuit breaker.
Table 58 on page 102 describes which components are powered by each input.
Table 58: Components Powered by Each Four-Input 240-A DC Power
Supply Input
Input
INPUT 0
INPUT 1
INPUT 2
INPUT 3
shows the four-input 240-A DC power supply.
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
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