4-20ma converted to 0-40ma
4-20ma converted to 0-40ma
(OP)
I have an Allen Bradley SLC500 PLC that has 4-20ma analog outputs , id like to convert a 4-20ma 24V output signal to 0-40ma 24V . Any ideas how this can be achieved ?
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
4-20ma converted to 0-40ma
|
4-20ma converted to 0-40ma4-20ma converted to 0-40ma(OP)
I have an Allen Bradley SLC500 PLC that has 4-20ma analog outputs , id like to convert a 4-20ma 24V output signal to 0-40ma 24V . Any ideas how this can be achieved ?
Red Flag SubmittedThank you for helping keep Eng-Tips Forums free from inappropriate posts. Reply To This ThreadPosting in the Eng-Tips forums is a member-only feature.Click Here to join Eng-Tips and talk with other members! |
ResourcesThe world has changed considerably since the 1980s, when CAD first started displacing drafting tables. Download Now
Prototyping has always been a critical part of product development. Download Now
As the cloud is increasingly adopted for product development, questions remain as to just how cloud software tools compare to on-premise solutions. Download Now
Engineering-centric businesses face a number of challenges today, but unmanageable design and change processes don’t need to be counted among them. Download Now
|
RE: 4-20ma converted to 0-40ma
If you have a PLC with free inputs and outputs, you can do the same thing. But "connect" in the program.
It works because the outputs are true current sources and will not be affected by a companion output working into the same load. At least no as long as you stay below compliance voltage across the load.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: 4-20ma converted to 0-40ma
RE: 4-20ma converted to 0-40ma
For some reason, I thought that you were powering a device that operates at 24Vdc and consumes 0-40 mA current. If this is so, then DO NOT try this way. Use a 24V PSU.
RE: 4-20ma converted to 0-40ma
RE: 4-20ma converted to 0-40ma
I know 4-20 mA is a signaling standard. I work with them. My concern was the OP said he wants "0-40ma 24V". The "24V" part made me wonder about actually what he wants to achieve.
RE: 4-20ma converted to 0-40ma
RE: 4-20ma converted to 0-40ma
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: 4-20ma converted to 0-40ma
That's fine. I just thought he MIGHT have meant that.
BTW, are you familiar with any 0-40 mA device?
RE: 4-20ma converted to 0-40ma
RE: 4-20ma converted to 0-40ma
RE: 4-20ma converted to 0-40ma
So, it's a servo-controlled valve, and the 0-40 mA is input to the error amplifier of the servo. Then the solution indicated by Skogsgurra would work fine.