Keithley SourceMeter 2400, User Manual, Page: 318 / 594

2400 Series SourceMeter
®
User’s Manual Digital I/O Port, Safety Interlock, and Output Configuration 13-5
Remote digital output control
Use the :SOURce2:TTL <NRf> command to control the digital output line logic levels,
where <NRf> is the decimal value shown in
Table 13-1 . For example, send the following
command to set the output lines to L, H, L, H:
:SOUR2:TTL 5
Safety interlock
The digital I/O port provides an interlock line for use with a test fixture interlock switch.
When properly used, the OUTPUT of the SourceMeter will turn OFF when the lid of the
test fixture is opened. See
Section 2 , “ Connections ,” for important safety information
when using the test fixture interlock.
Table 13-1
Digital output line settings
OUT 4 OUT 3 OUT 2 OUT 1
Decimal
value*
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
L = Low (Gnd)
H = High (>+3V)
* 0-7 in 3-bit mode, which is controlled by CONFIG LIMIT menu.
(See Section 12 .) 0-65535 with 2499-DIGIO 16-bit option.
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