The Grayhill 70-OAC15A optocoupler module is designed for reliable signal transmission in industrial environments. It offers transient protection, ensuring robustness against voltage spikes. The SPST, normally open configuration, combined with zero-crossing turn-on, enhances operational safety. Certifications from UL, CSA, CE, and TÜV validate its adherence to international standards. The module's optical isolation protects sensitive circuits from interference, while the built-in status LED provides visual feedback on module operation. It is commonly used in industrial automation, motor control, and power supply applications.