Before
you
begin
to
install
options
in
the
BladeCenter
T
unit,
read
the
following
information:
v
Read
the
safety
information
beginning
on
page
113
and
the
guidelines
in
“Handling
static-sensitive
devices”
on
page
40.
This
information
will
help
you
work
safely
with
your
BladeCenter
T
unit
and
options.
v
Blue
on
a
component
indicates
touch
points,
where
you
can
grip
the
component
to
remove
it
from
or
install
it
in
the
server,
open
or
close
a
latch,
and
so
on.
v
Orange
on
a
component
or
an
orange
label
on
or
near
a
component
indicates
that
the
component
can
be
hot-swapped,
which
means
that
you
can
remove
or
install
the
component
while
the
BladeCenter
T
unit
is
running.
(Orange
can
also
indicate
touch
points
on
hot-swap
components.)
See
the
instructions
for
removing
or
installing
a
specific
hot-swap
component
for
any
additional
procedures
that
you
might
have
to
perform
before
you
remove
or
install
the
component.
v
You
do
not
need
to
disconnect
the
BladeCenter
T
unit
from
power
to
install
or
replace
any
of
the
hot-swap
modules
in
the
BladeCenter
T
unit.
You
need
to
shut
down
the
operating
system
and
turn
off
a
hot-swap
blade
server
on
the
front
of
the
BladeCenter
T
unit
before
removing
the
blade
server,
but
you
do
not
need
to
shut
down
the
BladeCenter
T
unit
itself.
v
For
a
list
of
supported
options
for
your
server,
go
to
http://www.ibm.com/pc/
compat/.
Preparing
for
system
power
There
a
number
of
basic
differences
in
preparing
for
system
power
between
the
Type
8720
(dc
power)
and
Type
8730
(ac
power)
units.
Type
8720
(dc
power)
The
BladeCenter
T
unit
does
not
have
a
power
switch.
The
BladeCenter
Type
8720
(dc
power)
unit
has
two
dc-power
terminal
connectors
each
powering
two
power
modules.
The
left
connection
(looking
from
the
rear)
supplies
power
to
power-module
bays
2
and
4,
while
the
connection
on
the
right
supplies
power
to
power-module
bays
1
and
3.
Each
dc
terminal
has
four
#M6
(1/4
in.)
studs,
one
for
-48
V
dc,
one
for
RETURN,
and
two
for
connecting
the
safety
ground
wire.
The
following
guidelines
are
provided
for
connecting
to
the
-48
V
dc
power
source:
v
DC
wire
rating
of
4AWG
(7x7x34/36
TC),
105C,
300V
UL
10198,
CSA
approved
and
VW1
rated.
v
Ring
terminal
designed
for
M6
stud,
4AWG
wire,
wire
size
(circular
Mil
area)
of
33100-52600,
and
a
wire
insulation
diameter
of
12.8mm
to
13.1mm.
Note:
The
actual
wire
gauge
and
ring
terminal
will
be
determined
by
the
current
draw
and
the
length
of
the
wire
run
or
as
specified
by
the
customer
premises
guidelines.
v
A
two-lug
ring
terminal
is
required
by
NEBS
for
connecting
the
single
safety
ground
wire.
Attention:
Remove
the
power
modules
before
installing
the
power
connections.
Once
the
power
connections
are
in
place,
the
power
modules
can
be
re-installed
in
the
BladeCenter
T
unit.
After
you
connect
power
to
the
BladeCenter
T
unit,
all
the
power-module
bays
receive
power.
The
blade
servers
in
the
BladeCenter
T
unit
are
connected
to
dc
power
but
are
not
turned
on.
Press
the
power-control
button
on
the
front
of
each
blade
server
to
obtain
full
power
for
the
blade
server
and
start
its
operating
system
38
BladeCenter
T
Type
8720
and
8730:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide
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