Juniper MX480 Quick Manual page 21

Copyright © 2015, Juniper Networks, Inc.
CAUTION: Ensure that each power cable lug seats flush against the surface
of the terminal block as you are tightening the nuts. Ensure that each nut
is properly threaded onto the terminal stud. The nut should be able to spin
freely with your fingers when it is first placed onto the terminal stud.
Applying installation torque to the nut when improperly threaded may
result in damage to the terminal stud.
CAUTION: The maximum torque rating of the terminal studs on the DC
power supply is 36 lb-in. (4.0 Nm). The terminal studs may be damaged
if excessive torque is applied. Use only a torque-controlled driver or socket
wrench to tighten nuts on the DC power supply terminal studs.
NOTE: The DC power supplies in
dedicated power feeds derived from feed
in and
PEM2
from feed B . This configuration provides the commonly deployed
redundancy for the system.
Replace the clear plastic cover over the terminal studs on the faceplate.
11.
Route the power cables along the cable restraint toward the left or right corner of the
12.
chassis. If needed to hold the power cables in place, thread plastic cable ties, which
you must provide, through the openings on the cable restraint.
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.
Switch on the dedicated customer site circuit breakers. Follow your site's procedures
14.
for safety and ESD.
Verify that the
INPUT OK
On each of the DC power supplies, turn the power switch to the on (
15.
Observe the status LEDs on the power supply faceplate. If the power supply is correctly
installed and functioning normally, the
green steadily.
Connect Power to a DC Router with High-Capacity Power Supplies
PEM0
must be powered by dedicated power feeds derived
PEM3
LED on the power supply is lit green.
,
PWR OK BRKR ON
and PEM1 must be powered by
, and the DC power supplies
A
A/B
— ) position.
, and LEDs light
INPUT OK
feed
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