Description <br> 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 <br> 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 <br> Onboard (transient voltage suppressor), which can effectively suppress surge voltages and transient voltages in the circuit, and protect against and static electricity <br> On-board self-restoring fuses and protection diodes stable current and voltage output, prevent overcurrent and overvoltage, and improve impact resistance <br> 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 <br> <br> Product type: Electrically isolated TTL to RS485 serial port converter <br> Power supply interface <br> Supply voltage: 3.3V ~ 5V <br> Interface protection: prevent overvoltage <br> Device interface: compatible with TTL/RS485 standard <br> TTL interface <br> Transmission distance: less than 10 meters <br> Transmission mode: point-to-point <br> RS485 interface <br> Interface protection: Provides 200W protection, anti-surge and 6KV electrostatic protection <br> Terminal resistance: 120R, can be enabled by welding switch <br> Transmission distance: about 1200 meters <br> Transmission mode: point-to-many (up to 32 nodes, it is recommended to add a repeater for more than 16 nodes) <br> Colour:Black <br> Material:PCB <br> <br> Package Contents: <br> 1x TTLTo RS485 Module <br> <br> Only the above package content, other products are not included. <br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. <br>