Connecting
the
BladeCenter
HT
type
8740
to
dc
power:
The
BladeCenter
HT
dc-power
inputs
are
configured
for
dc
isolated
return
(DC-I).
The
dc
RETURN
(RTN)
terminal
or
conductor
is
not
connected
to
the
equipment
frame
or
the
grounding
means
of
the
equipment.
Attention:
Only
trained
service
personnel,
other
than
IBM
service
technicians,
are
authorized
to
make
the
connections
to
and
disconnections
from
the
dc
power
source.
IBM
service
technicians
are
not
certified
or
authorized
to
install
or
remove
the
dc
power
cables.
The
customer
is
responsible
for
ensuring
that
only
trained
service
personnel
install
or
remove
the
dc
power
cables.
RTN
GND -48v
RTN
GND
-48v
RTN
GND
-48v
RTN
GND -48v
The
BladeCenter
HT
type
8740
has
four
dc-power
terminal
connectors.
Each
dc
terminal
has
four
#M6
(0.25-inch)
studs,
one
for
-48
V
dc,
one
for
RETURN
(RTN),
and
two
for
connecting
the
safety
ground
wire.
Each
terminal
has
a
terminal
cover.
Remove
the
terminal
cover
before
connecting
cables
to
each
terminal
and
reinstall
the
terminal
cover
on
each
terminal
before
supplying
power
to
the
BladeCenter
HT
unit.
For
more
information
on
removing
and
installing
a
terminal
cover,
see
“Removing
a
dc
terminal
cover”
on
page
42
and
“Installing
a
dc
terminal
cover”
on
page
61.
There
are
two
types
of
terminal
covers,
depending
on
date
of
manufacture.
The
following
illustrations
show
both
types
of
terminal
boxes
for
the
two
types
of
terminal
covers.
Nut
Flat washer
(optional)
Split washer
14
BladeCenter
HT
Type
8740
and
8750:
Installation
and
User’s
Guide
Summary of Contents for 87401RU
Page 3: ...BladeCenter HT Type 8740 and 8750 Installation and User s Guide...
Page 8: ...vi BladeCenter HT Type 8740 and 8750 Installation and User s Guide...
Page 82: ...66 BladeCenter HT Type 8740 and 8750 Installation and User s Guide...
Page 92: ...76 BladeCenter HT Type 8740 and 8750 Installation and User s Guide...
Page 108: ...92 BladeCenter HT Type 8740 and 8750 Installation and User s Guide...
Page 109: ......
Page 110: ...Part Number 44R5188 Printed in USA 1P P N 44R5188...
