Features: High Precise 8Channel Input with 0.01 resolution and ±5‰ accuracy, supporting frequency detection from 400Hz to 50KHz and 0-100% duty cycle for industrial equipment monitoring. Isolated RTU Communication features RS485 interfaces with rate (4800-256000) and address configuration (1-255), enabling seamless bus cascading and host computer connectivity. Industrial Grade Protections integrates power/magnetic/opticals isolation with TVS tubes and selfrecovery fuses. Wide Voltages Compatibility operates on DC7-36V power supply, accepts 3.3V-30V inputs, and incorporates watchdog circuit with reverse polarity protections for stable continuous operate. DIN Rails Mounting Design with stackable structure, 3status LEDs for monitoring, &35mm rails installation for efficient industrial deployment. Specifications: Component: ABS Size:Approx.121x72x34mm/4.76x2.83x1.34inch Communication: RS485 Communication rate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000 Default communication format: 9600, N, 8, 1 Standard RTU protocols; Power supply voltages: DC7V~36V input voltages: 3.3V~30V Frequency detection ranges: 400Hz~50KHz Frequency resolution: 0.01Hz Frequency accuracy: 5‰ Duty cycle detection ranges: 0~100% Duty cycle resolution: 0.01% Duty cycle accuracy: 5‰ Package Includes: 1pc RTU Input Module 1pc Adapter 1pc Screwdriver note: Please allow 1-3cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.