T640 Power System Description; T640 Two-Input 160-A Dc Power Supply Overview; Two-Input 160-A Dc Power Supply Description - Juniper T640 Hardware Manual

T640 Power System Description

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T640 Two-Input 160-A DC Power Supply Overview

Copyright © 2010, Juniper Networks, Inc.
T640 Three-Input 240-A DC Power Supply LEDs on page 53
T640 Four-Input 240-A DC Power Supply Overview on page 55
T640 Four-Input 240-A DC Power Supply LEDs on page 56
T640 Three-Phase Delta and Wye AC Power Supply Overview on page 57
T640 Three-Phase Delta and Wye AC Power Supply LEDs on page 60
The T640 Core Router supports these power supplies:
Two Two-input 160-A DC power supplies are supported in Junos OS Release 5.3 and
later.
Two Three-input 240-A DC power supplies in
OS Release 8.5 and later.
Two Four-input 240-A DC power supplies are supported in Junos OS Release 10.0 and
later.
NOTE: Mixing power supplies with a different number of inputs in the same
router is supported only during upgrade. Mixing different types of power
supplies is not supported during normal operations.
Powering On a DC-Powered T640 Router on page 130
Maintaining the T640 Power Supplies on page 159
T640 DC Power System Electrical Specifications on page 347
Two-Input 160-A DC Power Supply Description on page 49
Two-Input 160-A DC Power Supply Inputs on page 50
Two-Input 160-A DC Power Supply Load Sharing and Fault Tolerance on page 50

Two-Input 160-A DC Power Supply Description

Each two-input 160-A DC power supply weighs approximately 23 lb (10.5 kg) and consists
of two inputs, two 80-A (@ –48 VDC) circuit breakers, a fan, and LEDs to monitor the
status of the power supply. Figure 27 on page 50 shows the two-input 160-A DC power
supply.
Chapter 3: T640 Router Hardware Component Overview
mode are supported in Junos
2-INPUT
49