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 RFI electromagnetic interference, and prevents damage from burning. The 485 anti-interference device connects in series on the signal line. The passive RS485-422 broadband anti-interference isolator operates reliably in strong interference environments, ensuring normal control data communication. Product application: Features an elegant design with simple wiring and easy operation. Widely used in industrial monitoring, civil PTZ monitoring, and industrial equipment control systems. 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 usage 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 (Only the above items included; other products not included) Note: Lighting reflections and display differences may cause slight variations in color between the image and actual item. Measurement error allowed: +/- 1-3cm.