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1-6
Plug-in switching modules
Up to two Keithley switching modules can be installed in the Model 2790. A side-by-side
comparison of the switching modules is provided in
Basic close/open operation for switching module channels is provided in
scanning for the 7702 is covered in
7752, and 7753 switching modules is provided in the Model 2790 User's Manual. Connec-
tion information for the Model 7702 is provided in its own manual (packing list).
Table 1-1
Models 7702, 7751, 7752, and 7753 switching modules
Input channels
40 channels
Amps inputs
2 channels
2-pole operation
40 channels
4-pole operation
20 channel pairs
System channel
Yes
operation
Multiple channel
Yes
operation
Measure volts
300V Max
Measure amps
Ch 41 and 42, 3A Max
Measure ohms
2/4-wire
Measure temp
Thermistor, 4-wire RTD
I-source
N/A
V-source
N/A
1
Relay type
Latching electromechanical
Connector type
Oversized screw terminals
Configuration
Multiplexer
Unique features
All DMM functions
1. Latching relays hold their open/close state after the Model 2790 is turned off. When turned on, all relays open after a few seconds.
2. The Model 7702 can be configured as two independent multiplexers.
3. Note: The 7702 module is safe to use with the 500V source of the 7751 module. The V-source is energy limited and classified as a
non-hazardous source per EN61010.
4. Maximum Model 7751 voltage source output current for rated accuracy is 50μA. Maximum Model 7753 voltage source output cur-
rent for rated accuracy is 500μA.
Model 2790 SourceMeter
Model 7702
8 channels
N/A
8 channels
4 channels
No
Yes
3
Connect no external
sources
3
N/A
2/4-wire
Thermistor, 4-wire RTD
0 to 50mA
50 to 500V
Latching electromechanical
Oversized screw terminals
(quick-disconnect)
2
Independent switching
Test bridgwires, shunts, and
insulation resistance of air-
bag inflators
®
Table
Section
7. Connection information for the Models 7751,
Model 7751/7753
4
Switch System Reference Manual
1-1.
Section
2, while
Model 7752
8 channels
N/A
8 channels
4 channels
No
Yes
Connect no external
sources
N/A
2/4-wire
Thermistor, 4-wire RTD
0 to 50mA
No
Latching electromechanical
Oversized screw terminals
(quick-disconnect)
Independent switching
Test bridgwires and shunts
of airbag inflators
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