Specifications

Analog Input Modules
144
31007715 6/2008
In the 4 to 20 mA operating range, linear current representations can be
interpreted using the formula, where V
n
is the numerical count and I
ai
is the analog
input current:
Here is an example in signed input data format:
OCE over-current error
OCW over-current warning
UCE under-current error
UCW under-current warning
BWE broken wire error
Note: Errors and warnings are based on count values, not current values. The
current values in the table below are ideal values.
Type of Error
or Warning
4 to 20 mA Range (default) 0 to 20 mA Range
Current Signed
Count
Unsigned
Count
Current Signed
Count
Unsigned
Count
V
n
= (I
ai
- 4 mA) x 2 000 for the signed input data format
V
n
= (I
ai
- 4 mA) x 4 000 for the unsigned input data format
UCW
UCE
12 mA
20.38 mA
0
4mA
3.62 mA
20 mA
-767 16 000 32 000 32 767
I
ai
V
n
OCE
OCW
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com