cable
that
does
not
exceed
3
meters
(9.8
ft).
Use
the
Devices
and
I/O
Ports
options
in
the
IBM
Configuration/Setup
Utility
program
to
configure
the
parallel
connector
as
bidirectional.
Serial
connectors
There
are
two
serial
connectors
on
the
rear
of
the
computer.
Use
these
connectors
to
connect
serial
devices.
The
following
illustration
shows
a
serial
connector.
1
5
6
9
Ultra320
SCSI
connector
Your
computer
has
an
integrated
SCSI
controller.
This
dual-channel
controller
supports
two
independent,
Ultra320
SCSI
channels
that
support
up
to
15
SCSI
devices
each.
The
SCSI
connectors
for
the
channels
are
on
the
system
board.
The
controller
has
the
following
features:
v
Double-transition
clocking
to
achieve
up
to
320
MBps
(megabytes
per
second)
data-transfer
rates
v
Domain
name
validation
to
negotiate
compatible
data-transfer
speeds
with
each
device
v
Cyclic-redundancy
checking
(CRC)
to
improve
data
reliability
v
An
active
terminator
for
SCSI
bus
termination
The
following
illustration
shows
a
SCSI
connector.
34
1
68
35
SCSI
cabling
requirements
You
can
install
four
internal
SCSI
devices
using
the
SCSI
signal
cable
that
comes
with
some
computer
models.
If
you
plan
to
attach
external
SCSI
devices,
you
can
order
an
additional
SCSI
cable,
remove
the
SCSI
knockout
from
the
rear
of
the
computer,
and
connect
the
new
cable
from
the
SCSI
channel
A
connector
on
the
system
board
to
this
opening.
To
select
and
order
the
correct
cables
for
use
with
external
devices,
contact
your
IBM
marketing
representative
or
authorized
reseller.
See
“System
board
internal
connectors”
on
page
72
for
the
locations
of
the
SCSI
connectors.
If
you
want
to
attach
external
SCSI
devices
to
the
computer
without
using
the
internal
SCSI
channel
B,
you
must
install
an
optional
SCSI
adapter.
Setting
SCSI
IDs
Each
SCSI
device
that
is
connected
to
a
SCSI
controller
must
have
a
unique
SCSI
ID.
This
ID
enables
the
SCSI
controller
to
identify
the
device
and
ensure
that
different
devices
on
the
same
SCSI
channel
do
not
attempt
to
transfer
data
simultaneously.
SCSI
devices
that
are
connected
to
different
SCSI
channels
can
have
duplicate
SCSI
IDs.
See
the
information
that
comes
with
the
device
for
instructions
for
setting
its
SCSI
ID.
56
IntelliStation
Z
Pro
Types
6223
and
6227:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide
Summary of Contents for IntelliStation Z Pro 6223
Page 2: ......
Page 145: ...Appendix B Safety information 135...
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