10
Model 7703 – connections and wiring
The Model 7703 is a 32-channel high speed differential multiplexer module with the following features:
• 2-wire or 4-wire
Ω
measurement (automatically pairs switches for four wire measurements —
n
+ 16)
• 50-pin D-Shell connectors (2
×
DB50)
• Temperature applications (RTD or thermistor)
• High-speed non-latching reed relays (relays go to open state after power is removed or *RST)
• Designed specifically for use with Keithley’s Models 2700, 2701, and 2750 Systems.
NOTE
The 50-pin D-Shell connector mates with Model 7788.
Card configuration—connections
WARNING
The information in this section is intended for qualified service personnel. Do not
attempt to perform this procedure unless qualified to do so.
Do not exceed the maximum specifications for the Model 7703 module.
NOTE
When looking at the rear connectors of the Model 7703 module, the connector on the left is P1017
and the connector on the right is P1016.
Figure 6
Rear view—Model 7703 Pinouts (P1016 and P1017)
Make all connections using correct wire size (up to 20 AWG). Also, make sure to add supplementary insulation around the har-
ness for voltages above 42V peak (see Figure 7).
WARNING
All wiring must be rated for the maximum voltage in the system. For example, if 1000V
is applied to the front terminals of the Models 2700, 2701, or 2750, the plug-in module
wiring must be rated for 1000V.
Make all connections using correct wire size (up to 20 AWG) (refer to the Model 7788 documentation for specific wiring
instructions).
P1017
P1016
1
17
18
34
50
33
1
17
18
34
50
33
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