T640 Six-Input Dc Power Supply Description; Power Supply Components - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
Related
Documentation

T640 Six-Input DC Power Supply Description

Power Supply Components

104
Table 59: Four-Input 240-A DC Power Supply LEDs (continued)
LED Color
—One per Blue
DC OK
power supply
Yellow
OVER
—One per
TEMP
power supply
T640 Four-Input 240-A DC Power Supply Description on page 102
Maintaining the T640 Power Supplies on page 456
T640 LED Overview on page 464
Troubleshooting the T640 Power System on page 476
Replacing a T640 Four-Input 240-A DC Power Supply on page 366
Power Supply Components on page 104
Inputs on page 105
Redundancy on page 105
Each six-input DC power supply weighs approximately 39.7 lb (18.0 kg) and consists of
six inputs, two blowers, a front and side air filter, and LEDs to monitor the status of the
power supply. Each power supply is cooled by its own internal cooling system.
Figure 41 on page 105 shows the six-input DC power supply.
NOTE: There are no circuit breakers or passive fuses in the router.
State Description
On steadily When all four inputs are properly
energized, the
that the power supply is functioning
normally.
Blinking Either the power supply is starting
up, or it is not functioning, not
properly installed, or not operating
properly.
On steadily Power supply has exceeded
recommended temperature.
Off Power supply is within the
recommended temperature or the
power supply is not on.
Copyright © 2017, Juniper Networks, Inc.
LED indicates
DC OK