Keithley SourceMeter 2420 User Manual

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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Keithley SourceMeter 2420 Specifications

General

Brand	Keithley
Model	SourceMeter 2420
Category	Measuring Instruments
Language	English