Juniper M120 Hardware Manual page 278

M120 Multiservice Edge Router Hardware Guide
252
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 the power supply faceplate.
Attach an ESD grounding strap to your bare wrist and connect the strap to one of the
3.
ESD points on the chassis.
Switch the circuit breaker on the power supply faceplate to the off position (
4.
Remove the power cable from the DC power source.
5.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
6.
Remove the nut and washer from the terminal studs (see
7.
Cables from the DC Power Supply" on page
Remove the cable lug from the terminal studs.
8.
Loosen the captive screw on the cable restraint on the lower edge of the power supply
9.
faceplate.
Carefully move the power cable out of the way.
10.
Attach the lug on the replacement power cable to the terminal studs, making sure
11.
the cable is not touching or in the way of any router components.
Secure the power cable lugs to the terminal studs, first with the flat washer, then with
12.
the nut. Apply between 12 lb-in. (1.4 Nm) and 15 lb-in. (1.7 Nm) of torque to each nut,
(see "Connecting Power Cables to the DC Power Supply" on page 251
Route the power cable through the cable restraint.
13.
Tighten the cable restraint captive screw to hold the power cable in place.
14.
Replace the clear plastic cover over the terminal studs on the faceplate.
15.
Attach the power cable to the DC power source.
16.
and
(+)
"Disconnecting Power
246). (Use a 3/8–in. nut driver or pliers.)
Copyright © 2018, Juniper Networks, Inc.
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