T640 Dc Power System Requirements - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
Table 59: Six-Input DC Power Supply Electrical Specifications (continued)
Item
Input DC current rating
Related
Documentation

T640 DC Power System Requirements

430
T640 Power System Description on page 60
T640 DC Power System Electrical Specifications on page 427
T640 DC Power System Requirements on page 430
Maintaining the T640 Power Supplies on page 194
T640 General Electrical Safety Guidelines and Electrical Codes on page 404
To allow for future growth so that you can operate the T640 router in any hardware
configuration without upgrading the power infrastructure, we recommend that you
provision the following per each input. Doing so enables you to operate the router in any
configuration without upgrading the power infrastructure.
68 A @ –48 VDC (nominal) for each power supply input on a two-input 160-A DC
power supply
67 A @ –48 VDC (nominal) for input 0 and 67 A @ –48 VDC for input 1 on a three-input
240-A DC power supply
50 A @ –48 VDC (nominal) for each power supply input on a four-input 240-A DC
power supply
56 A @ –48 VDC (nominal) for each power supply input on a four-input 240-A DC
power supply
If you do not plan to allow for future growth, you can use the information in Table 1 to
calculate the typical power consumption @ –48 VDC and typical thermal output for your
current hardware configuration.
various hardware components when the router is operating under typical voltage
conditions.
Specification
Input 0: 45 A @ –48 VDC (nominal) (2160 W)
Input 1: 56 A @ –48 VDC (nominal) (2448 W)
Input 2: 56 A @ –48 VDC (nominal) (2448 W)
Input 3: 56 A @ –48 VDC (nominal) (2448 W)
Input 4: 56 A @ –48 VDC (nominal) (2448 W)
Input 5: 56 A @ –48 VDC (nominal) (2448 W)
Table 60 on page 431 lists the power requirements for
Copyright © 2013, Juniper Networks, Inc.