Robert Mramor s.p. Posted March 31, 2018 Report Share Posted March 31, 2018 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 Quote Link to comment Share on other sites More sharing options...
MVP 2021 Joe Tauser Posted April 1, 2018 MVP 2021 Report Share Posted April 1, 2018 How much does this little gem sell for? Joe T. 1 Quote Link to comment Share on other sites More sharing options...
Robert Mramor s.p. Posted April 2, 2018 Author Report Share Posted April 2, 2018 Dear Joe. The price of this little gem is 30€ Best regards Robert M. Quote Link to comment Share on other sites More sharing options...
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