T640 Three-Input 240-A Dc Power Supply Overview; Three-Input 240-A Dc Power Supply Description; Three-Input 240-A Dc Power Supply Inputs; Tolerance - Juniper T640 Hardware Manual

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T640 Three-Input 240-A DC Power Supply Overview

52
T640 Power System Description on page 49
Powering On a DC-Powered T640 Router on page 130
Maintaining the T640 Power Supplies on page 159
Three-Input 240-A DC Power Supply Description on page 52
Three-Input 240-A DC Power Supply Inputs on page 52
Three-Input 240-A DC Power Supply Load Sharing and Fault Tolerance on page 53

Three-Input 240-A DC Power Supply Description

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 28 on page 52 shows the three-input 240-A DC power supply in
mode.
2-INPUT

Figure 28: Three-Input 240-A DC Power Supply

Three-Input 240-A DC Power Supply Inputs

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 or
2–INPUT
and TX Matrix router.
Table 19 on page 53 describes which components are powered by each input.
mode. mode is required for the T640 router
3–INPUT 2-INPUT
INPUT 0 , INPUT 1 , and INPUT 2
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