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Card
Connections
&
installation
3.4
Typical
connection
schemes
The
following information provides
some
typical
con-
nection
schemes
for single card,
two-card,
and
two-
mainframe
system
configurations.
Connection
schemes
for the
multi-pin connector card
use
some
of
the
techniques presented
in
paragraph
3.3.2.
Keep
in
mind
that
^ese
are
only
examples
to
demonstrate
var-
ious
ways
to
wire a
test
system.
Connection
details for
both connector
cards (multi-pin
and
screw terminal
connector
cards) are
provided
in
paragraph
3.3.
3.4.1
Single
card system
Figure
3-9
shows
how
external
connections
can be
made
to
a
single
card
system
that
uses the multi-pin
connector
card.
Instrumentation
and
DUT
are
hard-
wired
to
the
Model 7011-MTR
male
bulkhead connec-
tor.
This
connector has
solder
cups
that will
accept
wire
size
up
to
#24
AWG.
The
test
system
is
connected
to the
matrix using the
Model
7011-MTC-2 roimd
cable
as-
sembly.
This
cable
mates
directly to
both
the external
bulkhead
connector
and
the
Model
7012-C matrix card
assembly.
Notice
that the
bulkhead
connector
is
shown
moimted
to
a
fixture to
help
keep
the
cabbng
stable
during the
test.
The
single
card
system
in
Figure 3-10
is
identical to
the
system
in the
previous
illustration,
except
for
the
con-
nection
scheme.
The
system
in
Figure
3-10
uses the
ter-
minal block connector
card.
With
this
card, single
conductor connections
are
made
directly
from
the
ter-
minal blocks
of the
connector card
to
instrumentation
and
DUT.
When
using a
single
card system,
make
sure that the
card
remains
electrically
isolated
from any
other
switching
cards.
There
are several
ways
to
ensure
iso-
lation for
a
single
card
in the
Model
7001 mainframe:
1.
Vacate
the other
mainframe
slot. If
there
is
a
Model
701X
card
installed in
the other
slot,
remove
it.
2.
Remove
the
backplane jumpers
on
the matrix
card.
This
win
disconnect the card
from
the
analog
back-
plane
of the
mainframe.
3.
Remove
the
backplane jumpers
from
the switching
card
installed in
the other
slot.
3.4.2
Two-card system
Both
Figure
3-11
and
Figure
3-12
show
a
system
using
two
matrix
cards
installed in
one
Model
7001 main-
frame
to
configure a
4 x 20
test
matrix.
In
both
these
cormection schemes,
row
connections
of
the
two
matrix
cards are
accomplished
internally
through
the back-
plane
of the
Model
7001 mainframe.
To
connect
rows
internally,
the
backplane
row
jumpers
of
both
matrix
cards
must be
installed.
Figure
3-11
shows
how
external
connections
can be
made
for
the multi-pin
connector
cards.
In
this
exam-
ple,
a
single
Model 7011-MTC-2
round
cable
assembly
is
cut
in half
to
provide
two
cables,
each
of
which
is
im-
terrrdnated
at
one
end.
The
unterminated ends
of the
two
cables are
hard-wired
to
instrumentation
and
DUT
as
shown
in the
drawing.
The
other
ends
of these
cables
mate
directly
to
the
Model
7012-C matrix
card assem-
blies.
Figure
3-12
shows
how
external
connections can
be
made
for
the
screw
terniinal
connector
card. Single
conductor connections
are
made
directly
from
the
screw
terminals of the
connector card
to
instrumenta-
tion
and DUT.
3-9
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