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4.10 Analogue output (option)
4 Measurement functions
Technical description
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VM59.EN001
4.10.
Analogue output (option)
A device with the mA option has one configurable analogue
output. The resolution of the analogue output is 10 bits
resulting current steps less than 25
A. The output current
range is configurable allowing e.g. the following ranges: 0 .. 20
mA and 4 .. 20 mA. More exotic ranges like 0 … 5 mA or 10 …
2 mA can be configured freely as long as the boundary values
are within 0 … 20 mA.
Available couplings to the analog output:
IL1, IL2, IL2
F
IL
I
0
, I
0
Calc
U
0
4.10.1.
mA scaling example
In this chapter, there is an example configuration of scaling the
transducer (mA) output.
Example 1
Coupling
=
IL
Scaled minimum
=
0 A
Scaled maximum
=
300 A
Analogue output minimum value
=
0 mA
Analogue output maximum value
=
20 mA
Figure 4.10.1-1 Example of mA scaling for IL, average of the three phase
currents. At 0 A the transducer ouput is 0 mA, at 300 A the output is 20 mA
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