Tx Matrix Dc Power Requirements; Table 35: T640 Two-Input 160-A Power Supply Electrical Specifications; Table 36: T640 Three-Input 240-A Power Supply Electrical Specifications - Juniper TX MATRIX Hardware Manual

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TX Matrix DC Power Requirements

Copyright © 2010, Juniper Networks, Inc.
Appendix D: Power Guidelines, Requirements, and Specifications for the TX Matrix Router

Table 35: T640 Two-Input 160-A Power Supply Electrical Specifications

Item Specification
DC input voltage Nominal –48 VDC, –60 VDC
Operating range: –40.5 to –72 VDC
NOTE: If the input voltage from the DC power source drops below –40.5
VDC, the router automatically shuts down. During automatic shutdown,
the circuit remains active. When the input voltage returns to –42.75 VDC,
the router automatically starts up again and the system returns to normal
operation within 30 minutes. No operator intervention is required.
Input DC current 68 A @ –48 VDC (nominal) for each input (3264 W)
rating
Table 36 on page 339 lists the power supply electrical specifications for the three-input
240-A power supply in two-input mode.

Table 36: T640 Three-Input 240-A Power Supply Electrical Specifications

Item Specification
DC input voltage Nominal –48 VDC, –60 VDC
Operating range: –40.0 to –72.0 VDC
NOTE: If the input voltage from the DC power source drops below –37.5 to
–39.5 VDC, the router automatically shuts down. During automatic shutdown,
the circuit remains active. When the input voltage returns to –43.0 to –44.00
VDC, the router automatically starts up again and the system returns to
normal operation within 30 minutes. No operator intervention is required.
Input DC current Input 0: 54 A @ –48 VDC (nominal) (2592 W)
rating
Input 1: 64 A @ –48 VDC (nominal) (3072 W)
NOTE: For a TX Matrix router, do not use
power supply.
Table 37 on page 340 lists the system current requirements for various hardware
components when the TX Matrix router is operating under typical voltage conditions.
on a three-input 240-A
INPUT 2
339