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Description
 The AMPCON-board converts an input current IE
ranging from 0 nA to 800 nA to an output current IA ranging from 4
mA to 20 mA such that the board can be integrated into a standard industrial 4
– 20 mA loop data bus.
The conversion is IA = C ×
IE + IOFF
An input current IE = 0 nA corresponds to the
offset current IOFF = 4 mA as output current. There are two trimmers
on the board. The offset current IOFF can be adjusted with the
trimmer OS. The amplification C can be adjusted with the trimmer AM.
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Input: |
3.5 mm audio jack for the sensor |
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Output: |
screw joint terminal with :
V+ : positive polarity of data-bus loop
0 : negative polarity of data-bus loop
G : optional mass, gets connected with the shielding of a
3.5 mm audio plug. |
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Power supply: |
A bias of 11- 28 V has to be applied between 0 and V+. The
resulting curent IA is the signal for the data bus. As standard, a 4
– 20 mA data bus is driven with 24 V. Therefore, the bias of the data bus
is usually sufficient to run the board. |
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Dimensions: |
width × length × height = 11.3 × 77.7
× 12.0 mm |
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Mounting: |
2 holes with 2.2 mm separated by 57.3 mm. |
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Options: |
The board is also available without in- & output
terminals and solder points only. |
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AMPCON 4-20