What Is an Opto-Isolator?

Optoelectronic isolator (abbreviated as OC in English) is also called optocoupler, optocoupler, and optocoupler for short. Optical couplers use light as a medium to transmit electrical signals. It has good isolation for input and output electrical signals, so it is widely used in various circuits.

I. Signal isolation:

The purpose is to isolate the interference source and the susceptible part from the circuit, so that the measurement and control device maintains only signal contact with the scene, and does not directly occur electrical contact. The essence of isolation is to cut off the introduced interference channels, so as to achieve the purpose of isolating on-site interference. The common isolation methods between the measurement and control device and the field signal, and between the weak and strong current are photoelectric isolation,

There are many small transient pulses in the industrial application environment. These transient pulses will affect the transmission of data and even harm the interconnected equipment.

Photoelectric coupling devices are light-emitting devices (such as light-emitting diodes) and light-sensitive devices (such as phototransistors) integrated together, and realize coupling by light to form electrical-optical and optical-electric conversion devices ^[3] .