4-20mA signal generator

ken c

Member

K

Join Date

Jul 2004

Location

new jersey

Posts

12

• Jul 20, 2004

• #1

anyone have a parts list to build a 4-20mA signal generator? I have a 24V dc power supply rated at 2.4 amps. this will be used for testing of a PLC (e.g. simulating signals). I'd like the ability to have multiple signals, individually adjustable.

 

Thomas Sullens

Member

T

Join Date

Feb 2004

Location

Idabel, Ok

Posts

390

• Jul 20, 2004

• #2

link

Click on Search at the top of the page.
In User name type ezal. In this thread panic mode
has a link in his post that maybe what you`re
looking for.

 

Tom Jenkins

Lifetime Supporting Member

Join Date

Apr 2002

Location

Milwaukee, WI

Posts

6,301

• Jul 20, 2004

• #3

Just use a pot and a resistor in series. A 1.2 kOhm in series with a 5 kOhm pot should do it.

 

BOB F

Member

B

Join Date

Aug 2004

Posts

1

• Aug 10, 2004

• #4

4 to 20 ma signal

You're smart. I use 3 0r 5k ohm potentiometer(pot), 2 watt maybe. This is useful in making the PLC thinks that the transducer output is changing in values or reacting to what it is sensing.

The thing could also be used as voltage output as in many sensors that can output either ma or volts.

 

PLucas

Member

Join Date

Apr 2002

Location

Gillingham Kent

Posts

1,742

• Aug 10, 2004

• #5

Re: 4 to 20 ma signal

BOB F said:

You're smart.

Click to expand...

Well Tom

You are finally getting the recognition you deserve

Paul