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Chapter 2 Function Reference — AI_Configure
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National Instruments Corporation 2-7 NI-DAQ FRM for PC Compatibles
1: Referenced Single-Ended (RSE) configuration (used when the input signal does
not have its own ground reference. The negative input of the instrumentation
amplifier is tied to the instrumentation amplifier signal ground to provide one).
2: Nonreferenced Single-Ended (NRSE) configuration (used when the input signal
has its own ground reference. The ground reference for the input signal is
connected to AISENSE, which is tied to the negative input of the instrumentation
amplifier).
inputRange is the voltage range of the analog input channels. polarity indicates whether the
ADC is configured for unipolar or bipolar operation:
0: Bipolar operation (default value).
1: Unipolar operation.
Table 2-1 shows all possible settings for inputMode, inputRange, and polarity. inputMode
is independent of inputRange and polarity. In this table, italic text denotes default settings.
Table 2-1.
Parameter Settings for
AI_Configure
Device
Possible
Values for
inputMode
Analog Input Range
Software
Configurable
inputRange polarity
Resulting
Analog
Input
Range
AT-MIO-64F-5,
AT-MIO-16F-5,
12-bit E Series
0, 1, 2 ignored unipolar 0 to +10 V Yes
ignored bipolar –5 to +5 V
AT-MIO-16X,
16-bit E Series,
PCI-6110E,
PCI-6111E
0, 1, 2 ignored unipolar 0 to +10 V Yes
ignored bipolar –10 to +10 V
MIO-16 and
AT-MIO-16D
0, 1, 2 10 unipolar 0 to +10 V No
10 bipolar –5 to +5 V
20 bipolar –10 to +10 V
Lab-PC+ 0, 1, 2 ignored unipolar 0 to +10 V No
ignored bipolar –5 to +5 V
1200 and
1200AI Devices
0, 1, 2 ignored unipolar 0 to +10 V Yes
ignored bipolar –5 to +5 V