Figure 107: Installing A Dc Power Supply - Juniper M320 Hardware Manual

Copyright © 2015, Juniper Networks, Inc.
Attach the lugs on the DC source power cables to the terminal studs.
9.
Attach the lugs on the positive (+) DC source power cables to the terminal studs.
a.
Attach the lugs on the negative (–) DC source power cables to the terminal studs.
b.
Secure each cable lug to the terminal stud, first with a washer, then with a nut. Use a
7/16-in. (11 mm) nut driver or socket wrench to tighten the nut. Apply between 23 lb-in.
(2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each nut.
NOTE: The DC power supplies in slots
by dedicated power feeds derived from feed
in slots
PEM2
derived from feed
A/B feed redundancy for the system.
Loosen the captive screw on the cable restraint on the right edge of the power supply
10.
faceplate.
Route the positive and negative DC power cables through the top and bottom of the
11.
cable restraint.
Tighten the cable restraint captive screw to hold the power cables in place.
12.
Verify that the ground and power cabling are correct, that they are not touching or
13.
blocking 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 on the external circuit breakers to provide voltage to the DC power source
15.
cable leads.
Switch the circuit breaker on the power supply faceplate to the on position (
16.
that the OUTPUT OK status LED on the power supply faceplate blinks, then lights
steadily approximately 1 minute after you switch the power supply circuit breaker on.

Figure 107: Installing a DC Power Supply

Chapter 28: Replacing Power System Components
PEM0
and must be powered by dedicated power feeds
PEM3
. This configuration provides the commonly deployed
B
and must be powered
PEM1
A , and the DC power supplies
). Verify
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