Replacing A T640 Six-Input Dc Power Supply Front Air Filter; Figure 206: Connecting The Dc Power Cable - Juniper T640 Hardware Manual

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Replacing a T640 Six-Input DC Power Supply Front Air Filter

Copyright © 2013, Juniper Networks, Inc.

Figure 206: Connecting the DC Power Cable

Cable lug
Locking
washer
Nut
Tighten the cable restraint captive screw or screws to hold the power cable in place.
4.
Replace the clear plastic cover over the terminal studs on the faceplate.
5.
Verify that the DC source power cabling is correct, that the power cable is not touching
6.
or blocking access to router components, and that it does not drape where people
could trip on it.
Attach the other end of the power cable to the external DC power source.
7.
Switch on the customer site circuit breakers.
8.
Verify that the
INPUT PRESENT
9.
indicating that the inputs are receiving voltage.
Switch the power switch on the power supply to the
10.
blinks momentarily, then lights steadily.
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.
Verify that the DC OK LED on the power supply faceplate is lit steadily, indicating that
11.
the power supply is correctly installed and is functioning properly.
T640 Power System Description on page 60
T640 Six-Input DC Power Supply Description on page 69
T640 Six-Input DC Power Supply LEDs on page 70
Troubleshooting the T640 Power System on page 207
T640 DC Power Supply Electrical Specifications on page 428
Site Electrical Wiring Guidelines for Juniper Networks Devices on page 426
Removing a T640 Six-Input DC Power Supply Front Air Filter on page 344
1.
2. Installing a T640 Six-Input DC Power Supply Front Air Filter on page 344
Chapter 17: Replacing T640 Router Hardware Components
Terminal studs
LEDs on the power supply faceplate are lit steadily,
ON
position ( ). The LED
| DC OK
343