1 Opto-isolators prevent high voltages from affecting the system receiving the signal. Usually opto-isolators transfer digital (On-Off) signals, but some techniques allow them to be used with analog signals. An opto-isolator (also called an optocoupler, photocoupler, or optical isolator) is an electronic component that transfers electrical signals between two isolated circuits by using light. Aside from power supplies, a common application of galvanic isolation is Ethernet connections on a circuit board.Ī common type of opto-isolator (or Optocoupler) consists of an LED and a phototransistor in the same opaque package. The concept is similar to that of a transformer, which through Galvanic Isolation, connects two circuits together while providing isolation. Commercially available opto-isolators withstand input-to-output voltages up to 10 kV and voltage transients with speeds up to 10 kV/μs. Opto-isolators prevent high voltages from affecting the system receiving the signal. In electronics, an opto-isolator, also called an optocoupler, photocoupler, or optical isolator, is a component that transfers electrical signals between two isolated circuits by using light. An optoisolator is an electronic device that can be used to pass information between a diode without passing an electrical current.
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