ECN Forum Forums Technical Discussion Electrical Theory and Applications 5VDC TO 4-20mA Conversion

5V/0.020A=250Ω, but it’s not usually that simple.

There is an offset problem for transducer output—below 1 volt, the current channel will treat the reading as zero, or as a signal error when under 4mA. A resistor may work with the right 4-20mA transducer output and 1-5V input channel.