Step
9.
Verify
that
the
Unit
Emergency
Power
Off
(UEPO)
Switch
is
in
the
Off
Position
Note:
UEPO
refers
to
the
red
Unit
Emergency
Power
Off
switch
located
on
the
unit.
EPO
refers
to
the
computer
room
Emergency
Power
off.
The
unit
emergency
power
off
(UEPO)
switch
is
located
on
the
front
of
the
system
rack.
When
the
switch
is
tripped,
utility
power
is
confined
to
the
machine
power
compartment.
All
volatile
data
is
lost.
Computer
Room
Emergency
Power
Off
(EPO)
Attention:
When
the
integrated
battery
feature
(IBF)
is
installed
and
the
room
EPO
is
turned
off,
the
batteries
engage
and
the
system
continues
to
run.
It
is
possible
to
attach
the
computer
room
EPO
system
to
the
machine
UEPO.
When
this
is
done,
turning
off
the
room
EPO
disconnects
all
power
from
the
power
cords
and
the
IBF
unit.
In
this
event,
all
volatile
data
is
lost.
To
incorporate
the
IBF
into
the
room
EPO,
a
cable
connection
must
be
made
to
connect
to
the
rear
of
the
system
UEPO
panel.
The
following
diagrams
illustrate
how
to
make
the
connection.
O
I
Switch in the
Active Position
Front
View
Rear
View
J02
J01
J00
Room EPO Cable
UEPO Switch
A Side BPC
B Side BPC
This
illustration
shows
the
rear
of
the
machine
UEPO
panel
with
the
room
EPO
cable
plugging
into
the
machine.
The
switch
actuator
located
at
the
bottom
of
the
UEPO
must
be
switched
to
the
″
active
″
position.
After
the
switch
actuator
is
moved
to
″
active
″
and
makes
the
cable
connection
possible,
the
room
EPO
cable
must
be
installed
for
the
machine
to
power
on.
The
following
illustration
shows
the
AMP
connector
(part
number
770019-1)
needed
to
connect
to
the
system
UEPO
panel.
For
room
EPO
cables
using
wire
sizes
#20
AWG
to
#24
AWG,
use
AMP
pins
(part
number
770010-4).
Chapter
2.
Installing
the
pSeries
655
13
Summary of Contents for pseries 655
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Page 125: ...1 Metal EMC Shield 2 Adapter Bracket Chapter 4 Installation and Removal Procedures 109...
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