Connecting Dc Power To The M40E Router - Juniper M40E Hardware Manual

M40e Multiservice Edge Router Hardware Guide
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Connecting DC Power to the M40e Router

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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, see Disconnecting AC Power from the M40e Router
or Disconnecting DC Power from the M40e Router.
After a power supply is powered on, it can take up to 60 seconds for status
indicators—such as LEDs on the power supply,
and messages on the craft interface LCD—to indicate that the power
supply is functioning normally. Ignore error indicators that appear during
the first 60 seconds.
Press the power switch on the other power supply to the
6.
the LEDs on the power supply faceplate. They should light as described in the previous
step.
If the LEDs are not lit in the appropriate pattern after 60 seconds, repeat the procedures
in "Installing an M40e AC Power Supply" on page 213 and the previous steps in this
procedure.
NOTE: When two power supplies are installed, at least one Routing Engine
and one FPC must also be installed for both power supplies to power on.
In the absence of this minimum load, only one power supply starts. (The
router powers on and operates correctly with one power supply, but
without the redundancy benefit of a second power supply.)
On the external management device connected to the Routing Engine, monitor the
7.
startup process to verify that the system has booted properly.
M40e Power System Description on page 42
M40e AC Power Electrical Safety Guidelines and Warnings on page 256
M40e AC Power, Connection, and Power Cord Specifications on page 277
Disconnecting AC Power from the M40e Router
Connect DC power to the router by attaching power cables from external power sources
to the terminal studs on the circuit breaker box. Power cables are not supplied with the
router. For DC power cable specifications, see "M40e DC Power, Connection, and Cable
Specifications" on page 279.
commands,
show chassis
ON ( | ) position and observe
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