4-20mAconversion to Volts and calculate shunt resistor required when converting the 4-20mA signal to Voltage.
The most common and cost effective way is to used a hunt resistor which can be calculated below or to use a PLC
4–20mA Signal Calculator
User Guide for 4-20mA Conversion
This tool will calculate the voltage drop from a current shunt resistor that is used to convert the 4-20mA output to a voltage output.
It will also calculate the shunt resistor required for a specified shunt resistor.
Select as appropriate , to calculate the Voltage drop with a given shunt resistor or calculate the shunt resistor with a given voltage drop
Where to place the 4-20mA Conversion shunt resistor
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4-20mA pressure and Level sensors
Converting 4-20mA to voltage products
Formulas and Equations
The Equations used by the to 4-20 mA to Voltage or Shunt resistor calculator
Vout = Iout4-20mA x Rshunt
Iout4-20mA = Vout / Rshunt
Rshunt = Vout / Iout4-20mA
- Rshunt = Load/Shunt resistance
- Iout4-20mA = Current output signal
- Vout = Voltage output
Formula Variables
Rshunt Shunt Resistor
This is the resistor placed in the diagram above to induce a voltage drop across it , this voltage drop is directly proportional to the current output, therefore it is used to convert the current loop signal into a voltage output signal
Iout4-20mA - The 4-20mA current loop output from the sensor
This is the 4-20mAcurrent loop output from the sensor
Vout - Voltage drop across Rshunt
The voltage drop caused by Rshunt It is direcly proportional to the 4-20mA current loop outut and is a cheap and effective way to convert from 4-20mA to Voltage