Juniper MX480, Hardware Manual

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Figure 72: Connecting DC Power to the Router
Powering On a DC-Powered MX480 Router with Normal Capacity Power Supplies
To power on a DC-powered router:
1.
Verify that an external management device is connected to one of the Routing Engine
ports (
CONSOLE
,
AUX
, or
ETHERNET
).
2.
Turn on the power to the external management device.
3.
Attach an ESD grounding strap to your bare wrist and connect the strap to one of the
ESD points on the chassis.
4.
Verify that the power supplies are fully inserted in the chassis.
5.
Verify that the source power cables are connected to the appropriate terminal: the
positive (+) source cable to the return terminal (labeled
RETURN
) and the negative
(–) source cable to the input terminal (labeled
-48V
).
6.
Switch on the dedicated customer site circuit breakers to provide power to the DC
power cables.
7.
Check the INPUT OK LED is lit steadily green to verify that power is present.
8.
If power is not present:
• Verify that the fuse is installed correctly and turn on the breaker at the battery
distribution fuse board or fuse bay.
Copyright © 2019, Juniper Networks, Inc. 210
MX480 Universal Routing Platform Hardware Guide