Figure 136: Connecting Power Cables To The Power Supply - Juniper T640 Hardware Manual

Copyright © 2010, Juniper Networks, Inc.

Figure 136: Connecting Power Cables to the Power Supply

Powering On a T640 Replacement Three-Input 240-A DC Power Supply
To power on a three-input 240-A DC power supply:
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
1.
the strap to one of the ESD points on the chassis.
Switch on the customer site circuit breakers to provide voltage to the DC power source
2.
cables.
Verify that the
INPUT PRESENT
3.
indicating that the inputs are receiving power.
Switch the circuit breakers on the power supply to the
4.
NOTE: After a power supply is powered on, it can take up to 60 seconds
for status indicators—such as the LEDs on the power supply, the command
output displays , and messages on the LED display on the craft
interface—to indicate that the power supply is functioning normally. Ignore
error indicators that appear during the first 60 seconds.
Chapter 17: Replacing T640 Router Hardware Components
LEDs on the power supply faceplate are lit steadily,
ON
position ( ).
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