Re: 4-20mA Analouge input
- From: Jamie <jamie_ka1lpa_not_valid_after_ka1lpa_@xxxxxxxxxxx>
- Date: Sun, 18 Feb 2007 18:15:36 -0500
AJ wrote:
Hi,Yes, you supply a 24 volt current source from your input to the
I have been asked to make a 4-20mA input and im not 100% how to go about this. Im sure there is a standard im meant to be following but im not sure what it is. Can anyone help point me in the right direction? Im imagining a sense resistor and an amplifier???
Best regards
AJ
transmitting device.
Normally, you do that via a 24 volt supply through a resistor
where at which point, you measure the return voltage and do the
math./.
just subtract what ever is coming back and use that to do the
basic ohms law of the source resistor you're using.
just put this into a op-amp as a voltage follower.
--
"I'm never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5
.
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- From: AJ
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