A: Optocouplers are well known as optoisolators providing an isolated galvanic barrier between the input and output utilizing infrared light. On the input side an infrared light emitting diode is used with all optocoupler types. On the output a wide variety of actuators. Optocouplers become specifically useful where an electrical signal is required to be sent across two circuit stages, but with an extreme degree of electrical isolation across the stages. Unlike transformers or capacitors, which can only transfer AC signals across the isolation barrier, optocouplers can. Optocouplers, also known as opto-isolators, uses infrared light to transfer electrical signals between two electrically isolated circuits and are commonly classified by their photosensitive output device What is an Optocoupler? An optocoupler (also called an opto-isolator, photo-coupler, or optical. Optocouplers are electronic components which use light waves to provide electrical isolation while transferring an electrical signal. All optocouplers consist of two elements: a light source — almost always a. Here I'll introduce programmable logic controller (PLC) input circuits using opto-couplers. I'll also discuss the concepts of SOURCE and SINK.
