Waveshare Modbus RTU Protocol 8-Ch Latching Relay Module (C) With RS485 Interface Features: 1. Support setting device address (1-255) to cascade multiple devices through RS485 bus 2. With flash-on and flash-off functions, the relay can be controlled by command to automatically close after being turned on for a period of time 3. Onboard integrated power isolation can provide stable isolation voltage, and the isolation end does not need additional power supply 4. Onboard integrated magnetic coupling isolation can be used for signal isolation, with high reliability, strong anti-interference and low power consumption 5. Onboard self-recovery fuse and TVS (transient voltage suppression tube) can effectively suppress surge voltage and transient spike voltage in the circuit, prevent overcurrent and overvoltage, lightning protection and anti-static 6. Using a dedicated magnetic latching relay driver chip, the driving ability is stronger and more stable 7. Onboard anti-reverse connection circuit to avoid reverse connection of positive and negative poles and burn out the circuit 8. Using high-quality relays, the load allowed is: less than or equal to 10A 250V AC or less than or equal to 10A 30V DC 9. Guide rail ABS protective shell, easy to install and use, safer with shell 10. External 3 LED indicators, convenient to check the MCU status and signal receiving and sending status 11. Using magnetic latching relays, the state of the relay will remain unchanged after power failure Product parameters: 1. Working voltage: 7V-36V 2. Communication protocol: RS485 3. Communication baud rate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000 4. Default communication format: 9600, N, 8, 1 5. Number of relays: 8 6. Contact type: one normally open, one normally closed 7. Contact load: less than or equal to 10A 250V AC or equal to 10A 30V DC 8. Modbus protocol: standard Modbus RTU protocol 9. RS485 address setting: 1-255 10. Indicator light: STA: MCU indicator light, flashes when MCU is w