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IC200ALG264, IC200ALG266
Analog Input Module, 15 Bit Current 15 Channels
Scaling
The following graphs illustrate the relationship between the input current
measured at the field terminals and the data that is output by the module.
Count and 4-20mA Input Current
Note 1) 4-20mA Range
4.077mA
154
4.0765mA
4.000mA
0
0
24
mA
20
16
12
8
4
0
The following equations can be used to calculate count values:
4-20mA Range:
0-20mA Range:
Note 1: In 4-20mA mode, signal inputs below 4.077mA are converted to zero counts.
Note 2: In 4-20mA mode, signal inputs at 20.000mA or above 20.383mA are converted to
GFK-1504N
Chapter 10 Analog Input Modules
4-20mA Range
0.5µA = 1counts
12.1935mA
12.193mA
12.1925mA
16385
12.192mA
16384
0
8192
16384
Count
Counts = (Current in mA - 4mA) x (32000 / 16mA
Counts = (Current in mA ) x (32000 / 20mA
32000 counts
Note 2) 4-20mA Range
20.3835mA
16386
20.000mA
32000
10.240mA
24576
32767
10
32767
20.384mA
32000
0-20mA Range
0.625µA = 1counts
10.241875mA
10.24125mA
16386
10.240625mA
16385
16384
)
)
10-45
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