Juniper Networks MX480 User Manual
Page 136
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
PEM0
and
PEM1
must be powered by
dedicated power feeds derived from feed
A
, and the DC power supplies
in
PEM2
and
PEM3
must be powered by dedicated power feeds derived
from feed
B
. This configuration provides the commonly deployed
A/B
feed
redundancy for the system.
11.
Replace the clear plastic cover over the terminal studs on the faceplate.
12.
Route the power cables along the cable restraint toward the left or right corner of the
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.
13.
Verify that the power cabling is correct, that the cables are not touching or blocking
access to router components, and that they do not drape where people could trip on
them.
14.
Switch on the dedicated customer site circuit breakers. Follow your site's procedures
for safety and ESD.
Verify that the
INPUT OK
LED on the power supply is lit green.
15.
On each of the DC power supplies, turn the power switch to the on (
—
) position.
Observe the status LEDs on the power supply faceplate. If the power supply is correctly
installed and functioning normally, the
PWR OK
,
BRKR ON
, and
INPUT OK
LEDs light
green steadily.
Copyright © 2013, Juniper Networks, Inc.
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MX480 3D Universal Edge Router Hardware Guide