In industrial control scenarios, optocouplers achieve electrical isolation between high and low voltage, blocking ground loops and electromagnetic interference. They can be used for PLC digital signal transmission, IGBT isolation drives for frequency converters/ servos, industrial power supply voltage stabilization feedback, 4-20mA analog signal acquisition, equipment fault protection, and RS485 communication isolation. Suitable for devices such as frequency converters, servo drives, rail power supplies, and energy storage converters, they meet industrial high-voltage safety standards and ensure stable operation across a wide temperature range.

PLC Control：

As the core industrial control device integrating automation, computer, and communication technologies, the PLC serves as the central hub of automated production lines. The Optocouplers AT3H4 and AT224 are specifically designed for PLC applications: the AT3H4 eliminates the need for polarity distinction and offers wide voltage compatibility, simplifying port wiring complexities; the AT224 dual-channel optocoupler enables microsecond-level high-speed switching without mechanical contact wear, ensuring faster, more stable, and safer PLC operation.

Frequency converter:
Frequency converters rely on frequency conversion and microelectronics technology to regulate the speed of AC motors, and are mainstream power control equipment. The AT330J and AT332J intelligent gate driven optocouplers from AutoDrive can directly drive high-power IGBTs, with strong overload protection performance, fast response, simplified peripheral circuit design, cost reduction and efficiency improvement, significantly enhancing the overall reliability of the inverter.

Security system:

The security camera is the core acquisition device for video surveillance, covering visible light and near-infrared image acquisition. The AT817 and AT172 optocouplers are used for equipment power supply voltage feedback and control signal isolation; Among them, the AT172 low-power optical relay can be matched with a smoke detector, which quickly conducts and transmits alarm signals when detecting smoke, and links with a buzzer to issue warnings. It is stable and low consumption, suitable for all-weather security equipment.