Keithley 7707, User Manual

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4
Connections and wiring overview
WARNING All connection and wiring information is intended for qualified service personnel. Do
not make switching module connections unless qualified to do so.
To prevent electric shock that could result in serious injury or death, adhere to the
following safety precautions:
• Before removing or installing the switching module in the mainframe, make sure the
mainframe is turned off and disconnected from line power.
• Before making or breaking connections to the switching module, make sure power is removed
from all external circuitry.
• Do not connect signals that may exceed the maximum specifications of the Model 7707.
Specifications are provided at the end of this section.
D-shell connectors
Figure 2 shows the pin numbers for the Model 7707 rear panel connectors. The 50-pin D-shell is used to access digital input/
output channels, and the 25-pin D-shell is used to access analog input channels. Terminal identification for the D-shell
connector pins is provided in
Table 1 .
Figure 2
Rear view—Model 7707 pinouts
17
1
33
50 34
18
13
1
14 25
50-pin D-shell connector (male)
25-pin D-shell connector (female)