Features: This RTU 8 channel relays module features wide voltages input ranges (7V 36VDC) and 8 independents relays for control for development board accessories in automation projects. with individual LED indicators for realtime monitoring and ABS build, this relays module ensures easy installation operations in confined spaces. for hobbyists, engineers, and automation professional who need to integrate relays control with PLCs, controllers for efficient project setups. for applications like home automation, industrial environments, or laboratory settings where remote control of lights, fans, motors, or other loads is required via RTU communication. With its RTU protocols compatibility and user friendly design, this 8 channel relays accessory enhances control capabilities and simplifies integration for various development board systems. Specifications: Materials: ABS Size: 145x90mm Weight: 350g Power supply voltages: 7~36V Communication interfaces: RS485 Communication rate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000 Default communication format: 9600, N, 8, 1 Number of relays channels: 8 channels Package Includes: 1PC RTU 8 Channel relays Module note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.