National Instruments DAQ X Series

Chapter 4 Analog Input
X Series User Manual 4-46 ni.com
Analog Input Triggering
Analog input supports three different triggering actions:
• Start trigger
• Reference trigger
•Pause trigger
Refer to the AI Start Trigger Signal, AI Reference Trigger Signal, and
AI Pause Trigger Signal sections for information about these triggers.
An analog or digital trigger can initiate these actions. All Simultaneous
MIO X Series devices support digital triggering, but some do not support
analog triggering. To find your device triggering options, refer to the
specifications document for your device.
Connecting Analog Input Signals
Table 4-6 summarizes the recommended input configuration for different
types of signal sources for Simultaneous MIO X Series devices.
Refer to the Analog Input Terminal Configuration section for descriptions
of the input modes.
Table 4-6. Simultaneous MIO X Series Analog Input Signal Configuration
Input
Floating Signal Sources
(Not Connected to Earth Ground)
Ground-Referenced Signal Sources
Examples:
•Ungrounded thermocouples
• Signal conditioning with isolated
outputs
• Battery devices
Example:
•Plug-in instruments with
non-isolated outputs
Differential
(DIFF)
AI 0 +
AI 0 –
AI GND
V
1
+
–
+
–
R
R
V
1
AI 0 +
AI 0 –
AI GND
+
–
+
–
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com