4-20ma signal generator

[mohannad100]

i have 24v dc i need to generate 4-20ma currnt to test plc and adjustable electronic circuit that work with 4-20ma
i need help
and thc circuit
thanks.

 

[Siniša]

4 20 ma signal generator

Connect current meter (that you trust) in series with 1kΩ resistor and 10kΩ potentiometer. Conect your +24V through this meter-resistor circuit to positive input of your PLC card and connect negative input of PLC card to 0V(-end of your 24V supply)
Set reading of current in appropriate range and turn potentiometer until you reach desired value.
There you go.