Keithley 7707, Руководство пользователя

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10
Figure 5
Connecting ribbon cable assembly
Solder cup cable connections
Make all connections to D-shell male solder cup connectors using the correct wire size up to 20 AWG. Terminal identification
for the 50-pin D-shell connector is provided in
Table 1 and Table 2 . Terminal identification for the 25-pin D-shell connector is
provided in Table 1 and Table 3 . Make sure to add supplementary insulation around the harness for voltages above 42V peak
( Figure 6 ).
WARNING For analog inputs (DB-25), all solder cup wiring must be rated for the maximum voltage
in the system. For example, if 300V is applied to the front terminals of the DMM, all
wiring for analog inputs must be rated for 300V.
For the digital I/O (DB-50), wiring must be rated for the maximum voltage applied to a
digital terminal (up to 40V).
A connector cover must be installed on an unused 50-pin D-shell connector. If the
connector is left open, an electrical shock hazard may be present.
Figure 6
Connecting solder cup cable assembly
WARNING: When using ribbon cable, on the DB-25, DO NOT
exceed 42 volts on any analog input in the test system
(including the front panel inputs of the Model 2700/2750).
The DB-50 connector is used for digital I/O connections.
DO NOT exceed 40V on any digital terminal in the test
system.
Install Plastic Cover
over unused connector
using two #4-40 screws.
KEITHLEY
CONNECTOR COVER
DB-50 DB-25
WARNING:
When using a solder cup cable on the DB-25, use supplementary
insulation around the harness for voltages above 42V peak.
The DB-50 connector is used for digital I/O connections. DO NOT
exceed 40V on any digital terminal in the test system.
Install plastic cover
over unused connector
using two #4-40 screws.
KEITHLEY
CONNECTOR COVER
DB-50
Supplementary
Insulation
DB-25