Industrial-standard isolated RS485 to PWM pulse output module. Four channels with independently adjustable frequency and duty cycle. Employs Modbus RTU protocol and features built-in protection circuits including power isolation, magnetic coupling isolation, self-resetting fuse, and TVS. Supports setting device addresses (1~255) for cascading multiple devices via RS485 bus. Onboard voltage regulator chip supports a wide voltage range of 7V~36V. Onboard integrated power isolation provides stable isolation voltage, eliminating the need for external power supply to the isolation terminals. Onboard integrated magnetic coupling isolation enables signal isolation, offering high reliability and strong anti-interference capabilities. Communication Interface: RS485 Communication Baud Rate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000 Default Communication Format: 9600, N, 8, 1 Modbus Protocol: Standard Modbus RTU Protocol Power Supply Voltage: DC 7V ~ 36V Output Voltage: Default 3.3V, can be set to 5V via internal jumper cap Output Current: Signal type, <30mA Pulse Frequency: 1Hz ~ 200KHz Frequency Resolution: 0.01Hz Duty Cycle: 0~100% Duty Cycle Resolution: 0.01% Color: Black Material: ABS Package Contents: 1*PWM Pulse Output Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.