Keithley 7701 User Manual page 23

Multiple module system
Figure 12 shows a one-card test system to perform common-side ohms measurements on up to 32 DUT. The test system can be
expanded to test more DUT by adding one or more modules:
• Models 2700 and 2701 – Adding a second Model 7701 to the test system allows up to 64 DUT to be tested.
• Model 2750 – Use up to five Model 7701s to test up to 160 DUT.
When adding a Model 7701 module to a common-side ohms test system, you must wire the card properly to minimize path
resistance, especially for low-ohms measurements.
side ohms measurements. This connection scheme will minimize signal path resistance through the backplane connections of
the modules.
Notice that for the second module (slot 2), the P12 and P13 terminals are not used. Only the P12 and P13 terminals of the first
module are to be connected. It is best to use one common-side bus for all DUT. However, if more than one bus must be used,
connect them together using a bus jumper (as shown in
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Figure 14 shows how to properly wire a multiple card system for common-
Figure 14).