Contec AI-1604CI2-PCI, User Manual

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4. Functions
56
AI-1604CI2-PCI
Conversion data
The following equation represents the relationship between input data and voltage.
Voltage = Input data x (Max. range value – Min. range value)
÷
Reso Min. range value
The value of resolution for the 12bit device is 4096
<
±
10V range>
The table below shows the relationship between A-D conversion data and voltage.
Voltage Conversion data (12bit) Voltage Conversion data (16bit)
+9.995V 4095
+9.99970V 65535
: : : :
0.005V 2049
0.00030V 32769
0V 2048
0V 32768
-0.005V 2047
-0.00030V 32767
: : : :
-10.000V 0
-10.000V 0
Ex.: When input data 3072 is input at a resolution of 12bit in the ± 10V range
Voltage = 3072 x (10 - (-10)) ÷ 4096 + (-10)
= 5.0
<0 - 10V range>
The table below shows the relationship between A-D conversion data and voltage.
Voltage A-D conversion data (12bit) Voltage Conversion data (16bit)
+9.998V 4095
9.99985V 65535
: : : :
5.002V 2049
5.00015V 32769
5V 2048
5V 32768
4.998V 2047
4.99985V 32767
: :
: :
-0V 0
0V 0
Ex.: When A-D conversion data 3072 is input at a resolution of 12bit in the 0 - 10V range
Voltage = 3072 x (10 - 0) ÷ 4096 + 0
= 7.5