Juniper MX240 Hardware Manual page 133

Copyright © 2013, Juniper Networks, Inc.
Verify that the power supplies are fully inserted in the chassis.
3.
Verify that the source power cables are connected to the appropriate terminal: the
4.
positive (+) source cable to the return terminal (labeled
source cable to the input terminal (labeled
Switch on the dedicated customer site circuit breakers to provide power to the DC
5.
power cables.
Check that the
INPUT OK
6.
If power is not present:
7.
Verify that the fuse is installed correctly, and turn on the breaker at the battery
distribution fuse board or fuse bay.
Check the voltage with a meter at the terminals of the power supply for correct
voltage level and polarity.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
8.
the strap to one of the ESD points on the chassis.
On each of the DC power supplies, switch the DC circuit breaker to the center position
10.
before moving it to the on (
NOTE: The circuit breaker may bounce back to the off (
move the breaker too quickly.
Observe the status LEDs on each power supply faceplate. If a DC power supply is
correctly installed and functioning normally, the
LEDs light green steadily.
If any of the status LEDs indicates that the power supply is not functioning normally,
repeat the installation and cabling procedures .
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 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
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
11.
startup process to verify that the system has booted properly.
Chapter 10: Grounding and Providing Power to the MX240 Router
–48V ).
LED is lit steadily green to verify that power is present.
) position.
—
PWR OK
command display—to indicate that the power supply is
) and the negative (–)
RTN
O ) position if you
, , and
BRKR ON INPUT OK
request system halt command.
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