An optocoupler relay is a solid-state relay based on the principle of optocoupler, and its working principle is different from that of traditional electromagnetic relays. In conventional electromagnetic relays, an electric current passes through a coil that turns the core into a magnetic magnet that engages the armature, allowing the associated contact action to control the on/off of the load. Optocoupler relays, on the other hand, have no contacts and work somewhat similarly to optocouplers.
Optocoupler relays take advantage of the isolation characteristics of optocouplers to isolate the input signal from the output signal, thus avoiding problems such as wear and noise caused by contacts. Since there are no contacts, the service life of optocoupler relays is unlimited, and at the same time, they are characterized by no vibration and no switching sound.
Compared with electromagnetic relays, optocoupler relays have the advantages of high reliability, long life, low noise, high isolation voltage and low transmission delay. In addition, optocoupler relays also have the advantages of no electromagnetic interference, no spark discharge, no magnetic saturation, etc., making them have higher advantages in some high-demand application scenarios.
Optocoupler relays are used in a wide range of applications and can be used to control various loads such as light bulbs, light-emitting diodes, heaters, motors, etc. Due to their high reliability and long life, optocoupler relays are also commonly used in industrial automation, aerospace, military, and other fields.
In a word, optocoupler relay is a solid-state relay based on the principle of optocoupler, which has the advantages of high reliability, long life, low noise, etc., and can be widely used in various fields.