Industrial-grade large-sized electrical terminals provide stable and reliable contact. Anti-EMI frequency converter PLC interference protection for data integrity. Reduces signal surges, resists RMI electromagnetic interference, and prevents damage from burning. The 485 anti-interference device connects in series on the signal line. Passive RS485-422 broadband anti-interference isolator operates reliably in strong interference environments, ensuring normal control data communication. Product application: Designed with precision, simple wiring, and easy operation. Widely used in industrial monitoring, civil PTZ monitoring, and industrial equipment control. Features: Operating temperature range: -45°C to +85°C No photoelectric type temperature drift or additional power supply noise No external power supply required; uses passive optocoupler technology without power-stealing methods Eliminates secondary interference caused by power supply in RS485 photoelectric isolators Passive RS485/422 isolator with 12ns transient response Standard RS485/422 line impedance matching, return loss 18dB Low insertion loss, less than 0.8dB Operating temperature range: -45°C to +85°C Material: Plastic and metal Color: Black and blue Package Contents: 1 x RS485 anti-interference device Note: The package includes only the items listed above. Other products are not included. Light reflection and display differences may cause slight variations in color between the image and the actual item. Measurement error allowed is +/- 1-3cm.