Chapter 3 Hardware Overview
VXI-MIO Series User Manual
3-4
National Instruments Corporation
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.
Input Polarity and Input Range
♦
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.
Actual Range and Measurement Precision
Range
Configuration
Gain
Actual Input Range
Precision
1
0 to +10 V
1.0
2.0
5.0
10.0
20.0
50.0
100.0
0 to +10 V
0 to +5 V
0 to +2 V
0 to +1 V
0 to +500 mV
0 to +200 mV
0 to +100 mV
2.44 mV
1.22 mV
488.28
µ
V
244.14
µ
V
122.07
µ
V
48.83
µ
V
24.41
µ
V
