if you have siemens plc system u select input module 0-5 volt analog voltage i.put selection and get the calculated value in words to get exit from 4-20 mA analog out module.
other vise you need real convertor of V - mA.check in internet lot of different sourse are available to buy...
thank you sir...
i am sankaranarayanan..
If the device needs power then this will do the job converting a resitsnce to 4-20. It will power up a resistance device and produce a 4-20 out.
and you have 4-20.
You can use a converter from Phoenix Contact. Visit the website http://www.phoenixcontact.com
You are kidding right? i mean, use a resistance for god sake, how do you convert voltage to current? that's electronics basic.
Well, a resistor will work when going from 4-20 ma to 1-5 volts. But it won't necessarily work going the other way. Current loop transmitters are designed to drive a load that can vary from application to application, from 50 ohms to 750 ohms, typically. A current transmitter is able to compensate for the addition or deletion of a loop instrument by using more or less power to drive the loop. A fixed-size resistor could not do this and voltage sources are not designed to power current loops. Voltage sources expect a high impedance measurement device to be attached.
That will give them 0-20 ma not 4-20ma. Look at converters from someone like Weidmuller or Phoenix Contact.
Contact Pepperl+Fuchs..Model KFDx-DCV. Dip switch selectable voltage input and dip switch selectable output.
Let using IC: AD693, AD694 or using this simple cir:
Good luck! ^_^
If you can't make it in basic way like using resistors, you can provide signal conditioners on the market with several input signals as your (4-20mA) output signal. Like we've done on my previous project with several analog signals to convert.
We have been using these, try this:
You only can use a converter module, such as :ISO-U2-P1-O1. That price is very good, easy to use.
About the datasheet, check the link: