T640 Three-Input 240-A Dc Power Supply Description; Three-Input 240-A Dc Power Supply; Three-Input 240-A Dc Power Supply Inputs; Figure 37: Three-Input 240-A Dc Power Supply - Juniper T640 Hardware Manual

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T640 Three-Input 240-A DC Power Supply Description

Three-Input 240-A DC Power Supply

Three-Input 240-A DC Power Supply Inputs

Copyright © 2017, Juniper Networks, Inc.
T640 Power System Description on page 95
Powering On a DC-Powered T640 Router on page 239
Maintaining the T640 Power Supplies on page 456
T640 LED Overview on page 464
Three-Input 240-A DC Power Supply on page 99
Three-Input 240-A DC Power Supply Inputs on page 99
Three-Input 240-A DC Power Supply Load Sharing and Fault Tolerance on page 100
Each three-input 240-A DC power supply weighs approximately 25 lb (11.3 kg) and consists
of three inputs, three 80-A circuit breakers, a fan, and LEDs to monitor the status of the
power supply. Figure 37 on page 99
mode.
2-INPUT

Figure 37: Three-Input 240-A DC Power Supply

The three-input 240-A DC power supply inputs are labeled
from top to bottom. Each input consists of –48 VDC and return, each with its own 80-A
circuit breaker. The input mode switch on the faceplate allows you to set the DC power
supply to either 2–INPUT or
and TX Matrix router.
Table 55 on page 100 describes which components are powered by each input.
Chapter 7: Power System Components and Descriptions
shows the three-input 240-A DC power supply in
3–INPUT mode. 2-INPUT mode is required for the T640 router
, , and
INPUT 0 INPUT 1 INPUT 2
,
99