Jump to content

Recommended Posts

Dear UNITRONICS users.


Sometimes it happens that you need more digital inputs on the OPLC because of pushbuttons.

 A solution is an OPLC with a larger number of inputs or an extension needs to be added when is possible. That can be  expensive. I developed a simple solution, which I  named,  the pushbuttons to current loop converter.  In this case, you only need one analog input (4 – 20mA), to add up to 19 pushbuttons via  two-wire shielded cable which can be up to 100m long.

The converter is self powered ( powered from current loop ).

The converter is reliable, since a very stabilized reference circuit is used.

The error is maximum +/- 1 digit on 10bit AD


I attach software  for  JAZZ with examples for easier understanding. It can be also used with others OPLC.


The converter is only available in our company for now.

For further info write on Email  biogorilniki@gmail.com. 


Best regards

Robert Mramor s.p.

Pushbutton to current loop - debouncing.U90



Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this