Keithley SourceMeter 2600 Series Reference Manual page 257

Series 2600 System SourceMeters Reference Manual
Output Enable (Models 2601/2602)
Overview
The Model 2601/2602 Digital I/O Port provides an Output Enable line for use with
a test fixture switch. When properly used, the output of the SourceMeter will turn
OFF when the lid of the test fixture is opened. See
information when using a test fixture.
WARNING
Operation
When enabled, the output of the Model 2601/2602 SourceMeter can only be
turned on when the Output Enable line is pulled high through a switch to +5V as
shown in
switch opens, and the Output Enable line goes low, turning the output of the
SourceMeter 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.
Front panel control of Output Enable
To activate the Output Enable line:
1.
2.
3.
4.
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 2601/2602
SourceMeter is not suitable for control of safety circuits and
should not be used to control a safety interlock.
Figure 10-3A. If the lid of the test fixture opens
Press the CONFIG key followed by the OUTPUT key.
Choose DIO-CONTROL, then press ENTER or the Rotary Knob.
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 de-activate the Output Enable signal so that its state
has no effect on the SMU output.
Press EXIT as needed to return to the normal display.
Return to
Section 3
Section 10 topics 2600S-901-01 Rev. A / May 2006
Digital I/O Port 10-9
for important safety
(Figure 10-3B), the