Connecting Power To A Dc-Powered Mx2020 Router With Power Distribution; Modules - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide
Connecting Power to a DC-Powered MX2020 Router with Power Distribution Modules
262
Replacing an MX2020 AC Power Supply Module on page 428
Replacing an MX2020 Three-Phase Delta AC Power Distribution Module on page 510
WARNING: Before performing DC power procedures, ensure that power is
removed from the DC circuit. To ensure that all power is
breaker on the panel board that services the DC circuit, switch the circuit
breaker to the OFF
in the position.
OFF
You connect DC power to the router by attaching power cables from the external DC
power sources to the terminal studs on the PDM faceplates. You must provide the power
cables (the cable lugs are not supplied with the router).
To connect the DC source power cables to the router:
Switch off the dedicated customer site circuit breakers. Ensure that the voltage across
1.
the DC power source cable leads is 0 V and that there is no chance that the cable
leads might become active during installation.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
2.
the strap to one of the ESD points on the chassis.
NOTE: If the PSMs are installed in the router, make sure the power switches
on all PSMs are turned to the off (
Move the DC circuit feed switch on the PDM faceplate to match the current rating
3.
amperage— 60 A , or 80 A
NOTE: The switch position applies to all inputs of this PDM. Selecting the
60 A position may reduce power output capacity available from each
PSM.
NOTE: The type of feed that you use on the DC PDM (60 A or 80 A)
depends on the distribution scheme and distribution equipment. With a
60 A feed, the maximum power supply output power is limited to 2100 W
while the maximum power supply input power is limited to 2400 W. With
an 80 A feed, the maximum power supply output is limited to 2500 W
while maximum power supply input power is limited to 2800 W. The
system power management software calculates the available and used
power based on DIP switch positions in the PDM.
position, and tape the switch handle of the circuit breaker
O ) position.
for each feed.
Copyright © 2015, Juniper Networks, Inc.
, locate the circuit
OFF