Compatible with TTL/RS485 standard, can convert TTL signal into differential RS485 signal, half-duplex communication. Compatible with 3.3V~5VTTL signal level, with overvoltage prevention circuit on the power supply end The on-board integrated power supply isolation can provide stable isolation voltage, and the isolation terminal does not require additional power supply. The on-board integrated digital isolation can perform signal isolation and has the characteristics of high reliability, strong anti-interference and low power consumption Onboard TVS (transient voltage suppressor), which can effectively suppress surge voltages and transient peak voltages in the circuit, and protect against Lightning-and static electricity On-board self-restoring fuses and protection diodes ensure stable current and voltage output, prevent overcurrent and overvoltage, and improve impact resistance The onboard RS485 output terminal has a 120R resistor, which can be switched and enabled by welding. It adopts black immersion gold technology and is compact in size, making it easy to integrate and embed Product type: Electrically isolated TTL to RS485 serial port converter Power supply interface Supply voltage: 3.3V ~ 5V Interface protection: prevent overvoltage Device interface: compatible with TTL/RS485 standard TTL interface Transmission distance: less than 10 meters Transmission mode: point-to-point RS485 interface Interface protection: Provides 200W Lightning-protection, anti-surge and 6KV electrostatic protection Terminal resistance: 120R, can be enabled by welding switch Transmission distance: about 1200 meters Transmission mode: point-to-many (up to 32 nodes, it is recommended to add a repeater for more than 16 nodes) Colour:Black Material:PCB Package Contents: 2x TTL