Connecting
the
BladeCenter
T
type
8720
to
dc
power
The
BladeCenter
T
Type
8720
unit
comes
with
one
pair
of
dc
hot-swap
power
modules
in
power-module
bays
1
and
2.
Each
active
power
module
supplies
12-volt
power
to
the
blade
bay
that
it
services.
The
BladeCenter
T
unit
supports
a
second
pair
of
power
modules
in
power-module
bays
3
and
4.
Power
modules
are
not
needed
in
bays
3
and
4
unless
you
install
blade
servers
and
options
in
blade
bays
5
through
8,
or
I/O
modules
in
I/O-module
bays
3
or
4.
Captive screws
Return
Return
-48 vdc
Safety ground
The
BladeCenter
T
unit
does
not
have
a
power
switch.
The
BladeCenter
T
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,
and
the
connection
on
the
right
supplies
power
to
power-module
bays
1
and
3.
Each
dc
terminal
has
four
#M6
(0.25-inch)
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
12.8
mm
to
13.1
mm
v
A
two-lug
ring
terminal,
required
by
NEBS
for
connecting
the
single
safety
ground
wire
To
provide
true
redundant
power,
BladeCenter
T
power
modules
1
and
3
must
be
connected
to
a
different
power
source
than
power
modules
2
and
4.
20
BladeCenter
T
Types
8720
and
8730:
Installation
and
User’s
Guide
Summary of Contents for BladeCenter T Type 8720
Page 3: ...BladeCenter T Types 8720 and 8730 Installation and User s Guide ERserver...
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Page 64: ...50 BladeCenter T Types 8720 and 8730 Installation and User s Guide...
Page 74: ...60 BladeCenter T Types 8720 and 8730 Installation and User s Guide...
Page 88: ...74 BladeCenter T Types 8720 and 8730 Installation and User s Guide...
Page 122: ...108 BladeCenter T Types 8720 and 8730 Installation and User s Guide...
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Page 128: ...Part Number 88P9320 Printed in USA 1P P N 88P9320...
