4channel RS485 to PWM Signal output Module Pulse Frequency Duty Cycle Adjustable Servo Square Wave modbus RTU Function Introduction: 1. Real time control of PWM signal output by writing duty cycle and frequency through registers 2. Support continuous output and specified pulse number output 3. The duty cycle and frequency of all four channels are independently adjustable 4. Power on output function, automatically outputting saved values when powered on 5. The amplitude voltage can be set to 5V or the supply voltage 6. Anti reverse connection of power supply, anti static surge of 485 interface 7. Recommended 9~24V power supply, maximum 7~30V 8. Industrial grade quality, hardware watchdog ensures 24-hour stable operation, wide temperature range of -40~85 ℃ to adapt to various environments Modbus Register Table Electrical parameters Product model: QX-D024 Supply voltage: DC 9~24V, maximum 7~30V Output signal: PWM square wave Frequency range: 1Hz~200KHz (four independent adjustable channels) Frequency adjustment resolution: 1Hz Duty cycle range: 0~100.0% (four independent adjustments) Duty cycle adjustment resolution: 0.1% PWM amplitude: Supply voltage or 5V (selected by dip switch) PWM driving current: amplitude voltage/(1000+input impedance) Output impedance: 1K Ω Jumping delay: ≤ 2us Communication interface: RS485 Communication format: 9600 (default), 8, N, 1 Communication protocol: Modbus RTU slave Working temperature: -40~80 ℃ Working humidity: 5~95% RH without condensation Installation method: rail or 2 * M3 screws Size: 54 * 100 * 32mm