Inputs; Redundancy; T640 Six-Input Dc Power Supply Leds; Figure 41: Six-Input Dc Power Supply - Juniper T640 Hardware Manual

Inputs

Redundancy

Related
Documentation

T640 Six-Input DC Power Supply LEDs

Copyright © 2017, Juniper Networks, Inc.

Figure 41: Six-Input DC Power Supply

The six-input DC power supply inputs are labeled
, and , from top to bottom. Each 60 A input consists of –48 VDC and
INPUT 4 INPUT 5
return.
Table 60 on page 105 describes which components are powered by each input.

Table 60: Components Powered by Each Six-Input DC Power Supply Input

Input
INPUT 0
through
INPUT 1 INPUT 5
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.
T640 Six-Input DC Power Supply LEDs on page 105
Troubleshooting the T640 Power System on page 476
Replacing a T640 Six-Input DC Power Supply on page 380
T640 DC Power Supply Electrical Specifications on page 126
LEDs on each six-input DC power supply faceplate indicate the status of the power
supply. In addition, a power supply failure triggers the red alarm LED on the craft interface.
Table 61 on page 106 displays the power supply LEDs.
Chapter 7: Power System Components and Descriptions
INPUT 0
Components
Fan trays
FPCs, Routing Engines, control boards, SIBs, craft interface, SCGs,
and other components in the router.
, INPUT 1 , INPUT 2 , INPUT 3 ,
105