Connecting Power To A Dc-Powered Mx240 Router With Normal-Capacity Power Supplies - Juniper MX240 Hardware Manual

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Connecting Power to a DC-Powered MX240 Router with Normal-Capacity Power Supplies

Copyright © 2019, Juniper Networks, Inc.
NOTE: After powering off a power supply, wait at least 60 seconds before
turning it back on. After powering on a power supply, wait at least 60
seconds before turning it off.
If the system is completely powered off when you power on the power
supply, the Routing Engine (or RCB) boots as the power supply completes
its startup sequence. If the Routing Engine finishes booting and you need
to power off the system again, first issue the CLI
command.
After a power supply is powered on, it can take up to 60 seconds for status
indicators—such as the status LEDs on the power supply and the
show chassis
functioning normally. Ignore error indicators that appear during the first
60 seconds.
On the external management device connected to the Routing Engine, monitor the
8.
startup process to verify that the system has booted properly.
Replacing an MX240 AC Power Supply Cord on page 314
Preventing Electrostatic Discharge Damage to an MX240 Router on page 380
CAUTION: Do not mix AC and DC power supply modules within the same
router. Damage to the router might occur.
WARNING: Before performing DC power procedures, ensure that power is
removed from the DC circuit. To ensure that all power is off, locate the circuit
breaker on the panel board that services the DC circuit, switch the circuit
breaker to the off position, and tape the switch handle of the circuit breaker
in the off position.
You connect DC power to the router by attaching power cables from the external DC
power sources to the terminal studs on the power supply faceplates. You must provide
the power cables (the cable lugs are supplied with the router). For power cable
specifications, see "DC Power Cable Specifications for the MX240 Router" on page
Chapter 3: Initial Installation and Configuration
command display—to indicate that the power supply is
request system halt
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