Halfhole process design with a thickness of 0.8 mm provides a sturdy, easy to use PCB that is suitable for welding terminals. The TTL side exposes RXD and TXD for clear transmit and receive signals. Power and signaling compatibility Input power range: 3.0 to 5.5 V, enabling seamless use with both 3.3 V and 5 V systems. Signaling compatibility: 3.3 V or 5 V communication signals can be matched to the RS485 interface. Industrial and reliability features Industrial design with strong anti interference capability. Enhanced protection for RS485 lines suitable for harsh industrial and field environments. Wide operating temperature: 40 to 85 C. Isolation and protection end isolation IC provides complete isolation between TTL and RS485 sides, with power isolation on both sides. Improved anti interference performance to maintain reliable data transmission in challenging conditions. Applications and use scenarios Industrial automation: connect 3.3 V or 5 V microcontrollers to RS485 field devices, sensors, and actuators in factory settings. Remote monitoring and data collection: reliable RS485 links for distant sensors in outdoor or harsh environments. PLC and embedded systems: isolated TTL to RS485 communication for safe integration into control networks.