Horner APG SmartStack I/O HE-ADC120 - Manual (Page 4)

PAGE 4 10 NOV 2006 MAN0235-09
ADC020/120
Information is subject to change without notice. SmartStack is a trademark of Horner APG, LLC.
5 INPUT CONVERSION FACTOR
The following table describes how real-world inputs are scaled into the controller. Given a known input
current, the data value is configured by using the conversion factor from the table. The following formula
is used: Data = Input Current (mA) / Conversion Factor
Example: The user selects a current range of 0 to +20 mA:
1) The known input current is 14 mA..
2) Using the table, the conversion factor for the current range of 0 to +20 VDC is 0.000625.
3) To determine the data value, the formula is used:
Data = Input Current (mA) / Conversion Factor
22400 = 14 mA / 0.000625
Conversion of Real-World Inputs into Controller
Selected Current
Range
Input Current (mA ) Data Conversion Factor
+20.47 32752
+20.00 32000
0 to +20 mA
0 0
0.000625
-20.00 -32000
-20 to +20 mA
-20.47 -32752
0.000625