Selection of galvanic isolation

Question

Electronics

Let's start with the fact that an optocoupler, a relay (I only know about solid state) and a transformer can act as an OGR.

The task is to select the OSR for discrete inputs and outputs according to the following parameters: for the input, the voltage is 24 V, the current is unimportant; for the output, the voltage is 110 V, the current is 7 A. The information in the datasheets and the chipdip.ru catalog is confusing, since the control parameters and input parameters are indicated. Apparently, you need to look at the input parameters, but it’s almost impossible to find according to the criteria that are set, somewhere the characteristics are not indicated at all. Specify where to look or can there be another way out of this situation? Well, maybe I'm misunderstanding something?

And as an example 6N137: www.platan.ru/cgi-bin/qwery.pl/id=7043&group=21001
The parameters are: "constant forward input voltage", "maximum input reverse voltage" and "maximum isolation voltage". Well, how to be?

Answer 1

What is an OGR? Need to repeat the waveform or just switch? If the current is not important, then a simple relay will suffice. An optocoupler will not draw such a current, you can put a field effect transistor or a thyristor to it.