Waveshare 24921 Modbus RTU 16-Ch Relay Module, RS485 Interface, With Multiple Isolation Protection Circuits Features: 1. This product is an industrial-grade 16-channel relay module controlled by RS485 bus, using Modbus RTU protocol, built-in power isolation, ADI magnetic isolation, resettable fuse, TVS diode and other protection circuits, and equipped with ABS case. 2. Modbus RTU 16 channel relay is very easy to use. Due to its fast communication speed, stability, reliability and security, it is ideal for industrial control equipment andor applications with high communication requirements. 3. Configurable device address (1-255), multiple devices can be cascaded on the RS485 bus 4. It has the function of blinking and blinking. By passing parameters to the command, the relay can be opened for a period of time and then automatically closed 5. On-board integrated power isolation, providing stable isolation voltage, no additional power supply is required at the isolation end 6. Onboard integrated ADI magnetic isolation, which can realize signal isolation, high reliability, strong anti-interference and low power consumption 7. Onboard resettable fuse and TVS (transient voltage suppressor), effectively suppress surge voltage and transient peak voltage in the circuit, provide overcurrentovervoltage, lightning protection, anti-static 8. On-board optocoupler isolation to prevent the relay from being interfered by the high-voltage circuit 9. On-board dedicated relay driver chip, built-in freewheeling diode protection, stronger and more stable driving capability 10. Anti-reverse connection circuit to prevent accidental damage to the circuit by wrong connection 11. High quality relay, contact rating: ≤10A 250VAC30VDC 12. Rail-type ABS shell, easy to install and safe to use 13. There are 3 LEDs for indicating MCU status and signal sending and receiving status Product parameters: 1. Working voltage: 5V 2. Communication interface: RS485 3. Baud rate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000 4. Default communi