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Chapter 3
Hardware Overview
Input Polarity and Input Range
VXI-MIO Series User Manual
For more information about the three types of input configuration, refer
to the Analog Input Signal Connections section in Chapter 4, Signal
Connections, which contains diagrams showing the signal paths for the
three configurations.
VXI-MIO-64E-1
This module has two input polarities—unipolar and bipolar. The
VXI-MIO-64E-1 has a unipolar input range of 10 V (0 to 10 V) and
a bipolar input range of 10 V ( 5 V). You can program polarity and
range settings on a per channel basis so that you can configure each
input channel uniquely.
The software-programmable gain on this module increases its
overall flexibility by matching the input signal ranges to those that
the ADC can accommodate. The VXI-MIO-64E-1 has gains of 0.5,
1, 2, 5, 10, 20, 50, and 100 and is suited for a wide variety of signal
levels. With the proper gain setting, you can use the full resolution
of the ADC to measure the input signal. Table 3-2 shows the
overall input range and precision according to the configuration
and gain used.
Table 3-2.
Range
Configuration
0 to +10 V
Actual Range and Measurement Precision
Gain
Actual Input Range
1.0
0 to +10 V
2.0
0 to +5 V
5.0
0 to +2 V
10.0
0 to +1 V
20.0
0 to +500 mV
50.0
0 to +200 mV
100.0
0 to +100 mV
3-4
Precision
2.44 mV
1.22 mV
488.28 V
244.14 V
122.07 V
48.83 V
24.41 V
National Instruments Corporation
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