Keithley 7709, User Manual, Page: 21 / 33

18
Row daisy-chaining using solder cup connectors
Figure 15 shows how to daisy-chain rows using solder cup connectors. Notice that not all row-to-row connections can be
accessed from the DB-25 connectors. For the Model 2750, daisy-chaining to the third and fifth matrix modules require that
rows be accessed at the DB-50 connectors.
Table 1 and Table 2 provide terminal identification for DB-50 connectors. Table 3
provides terminal identification for DB-25 connectors.
WARNING All solder cup wiring must be rated for the maximum voltage in the system. For
example, if 1000V is applied to the front terminals of the DMM, all matrix module
wiring must be rated for 1000V.
Figure 15
Row daisy-chaining using solder cup connectors
Typical DUT connections
The following examples show typical wiring connections for the following types of measurements:
•
Ω
2-Wire and thermistor connections, Figure 16 .
•
Ω
4-Wire and RTD connections, Figure 17 .
• Voltage connections (AC or DC), Figure 18 .
DB-50 DB-25 DB-50 DB-25
Columns
9-16
Rows
7709
(Slot 1)
7709
(Slot 2)
DB-50 DB-25 DB-50 DB-25
Columns
9-16
7709
(Slot 1)
7709
(Slot 2)
DB-50 DB-25 DB-50 DB-25
Columns
25-32
Rows
7709
(Slot 3)
7709
(Slot 4)
Columns
17-24
Rows
Columns
1-8
Rows
Columns
1-8
DB-50 DB-25
7709
(Slot 5)
Columns
33-40
Row Daisy-Chain
Cable*
Row Daisy-Chain
Cable*
Row Daisy-Chain
Cable*
Row daisy-chain cable:
Terminated with two
male solder-cup DB-25
connectors. *