Keithley 7012-S, Instruction Manual, Page: 36 / 93

Card Connections & Installation
3-9
3.4 Typical connection schemes
The following information provides some typical con-
nection schemes for single card, two-card, and two-
mainframe system conÞgurations. Connection
schemes for the multi-pin connector card use some of
the techniques presented in paragraph 3.3.2. Keep in
mind that these 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 round 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
mounted to a Þxture to help keep the cabling 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 will 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 conÞgure a 4
×
20 test matrix. In both these
connection 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 un-
terminated 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 terminal connector card. Single
conductor connections are made directly from the
screw terminals of the connector card to instrumenta-
tion and DUT.
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