Juniper T640 Hardware Manual page 344

T640 Core Router Hardware Guide
312
CAUTION: You must ensure that power connections maintain the proper
polarity. The power source cables might be labeled
their polarity. There is no standard color coding for DC power cables. The
color coding used by the external DC power source at your site determines
the color coding for the leads on the power cables that attach to the
terminal studs on each power supply.
Loosen the captive screws on the cable restraints on the right edge of the power
10.
supply faceplate.
Route the positive and negative DC power cables through the top and bottom of each
11.
cable restraint.
Tighten the cable restraint captive screws to hold the power cables in place.
12.
Verify that the power cabling is correct, that the cables are not touching or blocking
13.
access to router components, and that they do not drape where people could trip on
them.
Replace the clear plastic cover over the terminal studs on the faceplate.
14.
Switch the circuit breakers on the power supply to the on position (
15.
NOTE: If you have only one power supply, or if the router is completely
powered off when you power on the power supply, the Routing Engine
boots as the power supply completes its startup sequence.
Check the LEDs on the power supply faceplate. If the power supply is correctly installed
16.
and is functioning properly, the
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 output status LEDs on the power supply,
the command output displays, and messages on the LCD on the craft
interface—to indicate that the power supply is functioning normally. Ignore
error indicators that appear during the first 60 seconds.
NOTE: After powering on a power supply, wait at least 60 seconds before
turning it off. If you have only one power supply, power off the system
before turning off the power supply.
DC OK LED lights steadily, and the
Copyright © 2013, Juniper Networks, Inc.
and to indicate
(+) (–)
).
|
CB ON LED blinks