Figure 128: Connecting Power Cables To The Dc Power Distribution Module - Juniper MX2020 Hardware Manual

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Copyright © 2015, Juniper Networks, Inc.

Figure 128: Connecting Power Cables to the DC Power Distribution Module

D
Grounding points
(on chassis)
Route the positive and negative DC power cables through the plastic cable restraint
5.
cover. Make sure that the cable does not touch or obstruct any router components.
Verify that the DC power cable is connected correctly, that it does not touch or block
6.
access to router components, and that it does not drape where people could trip on
it.
Attach the power cable to the DC power source.
7.
Turn on the dedicated customer site circuit breaker to the PDM.
8.
Verify that the –48V LED on the PDM is lit steadily.
9.
On each of the DC power input sources, switch the DC circuit breaker to the center
10.
position before moving it to the
NOTE: The circuit breaker may bounce back to the
move the breaker too quickly.
Observe the status LEDs on the PDM faceplate. If the PDM is correctly installed and
functioning normally, the
Preventing Electrostatic Discharge Damage to an MX2020 Router on page 558
MX2020 DC Power Distribution Module Description on page 94
DC Power Cable Specifications for the MX2020 Router on page 184
Chapter 19: Connecting the Router to Power
Cable
Flat
lug
washer
Split
washer
Nut
position.
ON
LEDs light green steadily.
–48V
Terminal
studs
position if you
OFF
269