T640 Two-Input 160-A Dc Power Supply Description; Two-Input 160-A Dc Power Supply; Two-Input 160-A Dc Power Supply Inputs; Figure 34: Two-Input 160-A Dc Power Supply - Juniper T640 Hardware Manual

T640 Two-Input 160-A DC Power Supply Description

Copyright © 2013, Juniper Networks, Inc.
Two-Input 160-A DC Power Supply on page 61
Two-Input 160-A DC Power Supply Inputs on page 61
Two-Input 160-A DC Power Supply Load Sharing and Fault Tolerance on page 62

Two-Input 160-A DC Power Supply

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.
supply.

Figure 34: Two-Input 160-A DC Power Supply

Two-Input 160-A DC Power Supply Inputs

Each two-input 160-A DC power supply has two inputs—
to bottom—each with its own 80-A (@ –48 VDC) circuit breaker.
NOTE: All inputs on the two-input 160-A DC power supply in slot
be powered by dedicated power feeds derived from feed A, and all inputs on
the two-input 160-A DC power supply in slot
dedicated power feeds derived from feed B. This configuration provides the
commonly deployed A/B feed redundancy for the system.
Table 25 on page 61 describes which components are powered by each input.

Table 25: Components Powered by Each Input

Input Provides Power to These Components
FPCs in slots
INPUT 0 FPC0
and fan trays
Chapter 3: T640 Router Hardware Component Overview
Figure 34 on page 61 shows the two-input 160-A DC power
and , SIBs, control boards, Routing Engines, CIP, craft interface,
FPC1
and , from top
INPUT 1 INPUT 0
PEM0
PEM1 must be powered by
must
61