How to connect a 4-20mA to 0-10Vdc Analog Inputs

How to connect a 4-20mA to 0-10Vdc Analog Inputs

Have you got any analog signal 4-20mA? See the diagram below to know how to connect a 0-10Vdc Analog input.

  • Ardbox Analog or Ethernet PLC family products have some configurable Analog/digital input.conect4-20mA-to-0-10Vdc It is necessary to connect an impedance of 500 ohms between the 4-20mA analog signal and the ground signal. If you do that, the Analog value will be changed.

How is changing the Arduino input value

When you have a 4-20mA for 10bits you get these values:

4-20mA signal

10 bits


0 value


1023 value

but, if you convert this signal to 0-10Vdc, the results are:


0-10Vdc 10 bits
4mA 2Vdc

204 value* (aproximately)

20mA 10Vdc

1023 value

(*) As you can see, the result value of 4mA (i.e. 2Vdc), is about 204. You note that the line graph contains the result value. VdcValue


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