Typical Connection Schemes; Single Card System - Keithley 7015-S Instruction Manual

Card Connections & Installation
3.4

Typical connection schemes

The following information provides some typical connection
schemes for single card, two-card and two-mainframe sys-
tem configurations. Connection schemes for the multi-pin
connector card use some of the techniques presented in para-
graph 3.3.2. Keep in mind that these are only examples to
demonstrate various ways to wire a test system. Connection
details for both connector cards (multi-pin and screw termi-
nal connector cards) are provided in paragraph 3.3.
3.4.1 Single-card system
Figure 3-11 shows external connections for a single-card
system that uses the multi-pin connector card. This single-
card system is configured as two 1 × 20 multiplexers. To do
so, the appropriate bank-to-bank jumpers must be installed
to connect Banks A and B together and Banks C and D to-
gether.
Instrumentation and DUTs are hard-wired to the Model
7011-MTR male bulkhead connector. This connector has
solder cups that will accept wire sizes up to #24 AWG. The
test system is connected to the multiplexer using the Model
7011-MTC-2 round cable assembly. This cable mates direct-
3-10
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ly to both the external bulkhead connector and the Model
7015-C multiplexer card assembly. Note that the bulkhead
connector is shown mounted to a fixture to help keep the ca-
bling stable during the test.
The single-card system in Figure 3-12 is identical to the sys-
tem in the previous illustration except for the connection
scheme. The system in Figure 3-12 uses the screw terminal
connector card. With this card, single-conductor connections
are made directly from the terminal blocks of the connector
card to instrumentation and DUTs.
When using a single-card system, make sure that the card re-
mains electrically isolated from any other switching cards.
There are several ways to ensure isolation for a single card in
the Model 7001 or Model 7002 mainframe:
1. Vacate other mainframe slots. If there are Model 701X
cards installed in other slots, remove them.
2. Remove the backplane jumpers on the multiplexer card.
Doing so will disconnect the card from the analog back-
plane of the mainframe.
3. Remove the backplane jumpers from switching cards in-
stalled in all other slots.