What Does Opto Isolated Mean?

An opto-isolator is an electronic component that transfers electrical signals between two isolated circuits by using light. Opto-isolators prevent high voltages from affecting the system receiving the signal.

What is the purpose of opto isolation?

The main function of an opto-isolator is to block such high voltages and voltage transients, so that a surge in one part of the system will not disrupt or destroy the other parts.

What is an opto isolated relay?

Optically-isolated relays are characterized by the use of a light emitting diode (LED) on their input side, MOSFETs on the output side and an array of photo sensors in between. In operation, current flows through the LED, which then emits light.