Features: Experience integration with our Modbus RTU 1 Channel 5V Relays Module, featuring RS485 level conversion chip for stable performances. This module supports standard Modbus RTU protocol and offers RS485/TTL UART interfaces, with communication rates of 4800/9600/19200bps, ensuring connection option. Ideal for engineers and hobbyists, this Relays module caters to those efficient control solution in their electronic projects. Perfect for automation systems, industrial controls, and DIY electronics, the module ensures reliability across various applications. With Relays capable of handling 10A/250V or 10A/30V, this module promises over 100,000 cycles, enhances by discharge protective response times. Specifications: Communication protocol: supports standard Modbus RTU protocol. Communication: RS485/ TTL UART is supported. Communication rate: 4800/9600/19200, the default is 9600bps, which supports power-off saving. Optocoupler input signal: DC3.3-30V (this input cannot be used for Relays control). Power supply voltages: DC7-24V Size:Approx.70x40x4mm/1.57x2.75x0.15inch Package Includes: 1Pc Relays Module note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.