Horner APG SmartStack I/O HE-MIX902* User Manual

Page 6

PAGE 6

10 NOV 2006

MAN0292-08

MIX902

This Data Sheet is published individually & also as a part of the SmartStack Supplement (SUP0246-05).

Information is subject to change without notice. SmartStack is a trademark of Horner APG, LLC.

ANALOG 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 +20mA:

1) The known input current is 14mA.
2) Using the table, the conversion factor for the current range of 0 to +20mA is .000625.
3) To determine the data value, the formula is used:

Data = Input Current (mA) / Conversion Factor
22400 = 14mA / 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 +20mA

0 0

0.000625

ANALOG CONVERSION OUTPUT FACTOR

The following table describes how program data values are scaled to real-world analog voltage outputs by
the module. Given a desired output current, the data value is converted by using the conversion factor
from the table. The following formula is used: Data = Output Current (mA) / Conversion Factor

Example: The user selects a current range of +20mA:

1) The desired output current is 12mA.
2) Using the table, the conversion factor for the current range of +20 mA is 0.000625.
3) To determine the data value, the formula is used:

Data = Output Current (mA) / Conversion Factor
19200 = 12mA / 0.000625

Conversion of Real-World Outputs into Controller