8-6
Return to
2600AS-901-01 Rev. B / September 2008
Section 8: Digital I/O
Series 2600A System SourceMeter® Instruments Reference Manual
WARNING
When an interlock is required for safety, a separate circuit should
be provided that meets the requirements of the application to
reliably protect the operator from exposed voltages. The digital I/O
port of the Model 2601A or 2602A is not suitable for control of
safety circuits and should not be used to control a safety interlock.
Operation
When enabled, the output of the Model 2601A or 2602A can only be turned on when the output
enable line is pulled high through a switch to +5V, as shown in
. If the lid of the test
fixture opens (see
), the switch opens, and the output enable line goes low, turning the
output of the SourceMeter instrument off. The output will not be automatically turned on when
output enable is set high. The output cannot be turned back on until +5V is applied to the output
enable line.
Figure 8-3
Using Model 2601A/2602A output enable
Front panel control of output enable
To activate the output enable line:
1.
Press the
CONFIG
key followed by the
OUTPUT
key.
2.
Choose
DIO-CONTROL
, then press the
ENTER
key or the
navigation wheel
.
3.
Select
OE_OUTPUT_OFF
to activate the output enable signal causing the SMU output to
be blocked if the output enable is not asserted (connect to +5V). Select
NONE
to
deactivate the output enable signal so that its state has no effect on the SMU output.
4.
Press
EXIT
as needed to return to the normal display.
OE
(pin 24)
+5V
(pin 23)
Switch (Lid Closed)
Digital I/O
Model
2601A/2602A
SourceMeter
Test Fixture
A. OUTPUT can be turned on.
INT
(pin 24)
+5V
(pin 23)
Switch (Lid Open)
Model 2601A/2602A
SourceMeter
Test Fixture
B. OUTPUT cannot be turned on.
Digital I/O