Specifications

Analog Output Modules
31007715 6/2008 329
Output
Data Registers
Each STB ACO 1225 output data register represents the output data in the IEC data
format. The data has 10-bit resolution:
The value of each data word is represented in bits 14 through 5. The bits represent
current data as integer values in the range 0 to 32,736 in increments of 32. A value
32 000 results in a 20 mA output, and a value of 0 results in a 4 mA output.
Linear current representations can be interpreted using the formula:
where Cn is the numerical count and Iao is the analog output current.
Values greater than 32 000 do not produce over-range indications.
always 0
2
14
2
13
2
12
2
11
2
10
2
9
2
8
2
7
2
6
2
5
Ignored
STB ACO 1225 Data Register Format
1234567
9101112
1314
15
0
8
C
n
2000 I
ao
×()8000–=
I
C
32 736
32 000
15 mA
20.37 mA
20 mA
22 000
ao
n
4mA
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com