Physical
Description
Blower Module
Inside
each
AC-input
or
DC-input power supply one
fan forces cooling
air
through
the
power
supply
interior
The
air
flows
into
the faceplate of the
power
supply
and
out the rear of the
power
supply
or
the lower
front panel
of the
chassis
The
power
supply
monitors
its
own
temperature
and
internal
voltages
If
power
supply
detects
an
overvoltage
or overtemperature
condition
it
shuts
down
to
avoid
damage
to
itself
or other
system
components
For
description
of power-supply
shutdown
conditions
and
thresholds
refer
to
the
section
Environmental
Monitoring
and
Reporting
Functions
in
this
chapter
The AC-input and DC-input power
supplies
are
available
as
spares
for
immediate
onsite replacement
in case
one
fails
The
chapter
Maintaining
the
Router
provides
power
supply
replacement
instructions
In addition
detailed
up-to-date
instructions called
configuration
notes
are included
with
all
spares
when
they
are shipped
from
the factory
The
system
blower
is
mounted
in
self-enclosed
removable
module
and draws
cooling
air
through
the chassis
interior
to
maintain
an acceptable
operating
temperature
for the
internal
components
The
blower module
comprises
the
blower
printed
circuit
board
with
the speed
control
circuits
the
front-panel
LEDs
and
metal
case
with
handle The
blower module
slides
into
the top of the
chassis
from
the interface
processor
end
of the router
Figure
1-5
shows
the airflow
path
for the
system
blower and
power
supply
fans
Figure
1-5
Internal
Air
FlowSide
View
Exhaust
air
The
blower draws
air
in through
the intake
vent
below
the chassis card
cage
up
through
the card
cage
processor
modules
and
other
internal
components
through
the
blower module
and
out
through
the exhaust
vents
on
the front of the chassis
System
blower
Card
cage
Intake
air
Product
Overview
1-9
Summary of Contents for 7513 Series
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