Optical isolation
The aim of optical isolation is not to protect the electronic components from high voltage influences , but rather to ensure that the circuit is free of potential .
An electrically non-conductive layer is built up between the components to be isolated . The signals between the components are not transmitted electrically, but optically. This ensures that an interference current does not falsify the signal transmitted between the components. The non-conductive layer is designed for a maximum interference voltage below which dielectric strength is guaranteed and the insulation can thus be maintained.