T640 Two-Input 160-A Dc Power Supply Leds; Table 17: Fault Tolerance; Table 18: Two-Input 160-A Dc Power Supply Leds - Juniper T640 Hardware Manual

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T640 Two-Input 160-A DC Power Supply LEDs

Table 18: Two-Input 160-A DC Power Supply LEDs

LED Color
Green
CB OK
CB TRIP Yellow
OVER TEMP Yellow
Blue
DC OK
Copyright © 2010, Juniper Networks, Inc.

Table 17: Fault Tolerance

Redundancy
Nonredundant power
supplies
Redundant power supplies
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
Four LEDs on each two-input 160-A DC power supply faceplate indicate the status of
the power supply. In addition, a power supply failure triggers the red alarm LED on the
craft interface. Table 18 on page 51 describes the functions of the power supply LEDs.
State
On steadily
Off
On steadily
Off
On steadily
Off
On steadily
Blinking
Off
Chapter 3: T640 Router Hardware Component Overview
Fault Tolerance When One Input Fails or Is Disconnected
If either input fails, the router shuts down.
NOTE: We recommend that you install redundant power supplies.
If either input on one power supply fails, the other power supply
assumes the electrical load for both inputs. If one of the inputs on
the other power supply is not functional, the router shuts down.
Description
Circuit breaker is on.
Circuit breaker is off.
Circuit breaker is not turned on, or host subsystem
has detected a failure and has turned the circuit
breaker off.
No problems have occured with circuit breaker, or
the power supply is off.
Power supply has exceeded recommended
temperature.
Power supply is within the recommended
temperature or is not turned on.
Power supply is installed correctly and is
functioning normally.
Power supply is starting up, is not properly
installed, or is not functioning correctly. One of the
inputs might have failed, or the power supply might
not be receiving sufficient power.
Power supply is not powered on.
51