features: 1. Compatible with TTL/RS485 standard, can convert TTL signal to differential RS485 signal, half duplex communication. 2. Compatible with 3.3V~5V TTL signal level, with anti reverse connection and anti overvoltage circuit at the power supply end3. On board integrated power isolation can stable isolation voltage without additional power supply at the isolation end4. On board integrated digital isolation, signal isolation, high reliability, strong anti-interference and low power consumption5. On board (transient voltage suppressor) can effectively suppress surge voltage and transient voltage in the circuit, and prevent -and static electricity6. Board mounted self fuse and protective diode can stable output of current and voltage, prevent over-voltage and over-voltage, and impact resistance. 7. On board RS485 output terminal 120R resistor, which can be switched for easy operation. 8. Industrial guide type ABS environment-friendly shell, small size, convenient installation, cost-effectiveColor: whiteMaterial: ABSSpecifications:Product type: electrical isolated TTL to RS485 serial port converterPower supply voltage: 3.3V~5VInterface protection: anti overvoltage and anti reverse connectionEquipment interface: compatible with TTL/RS485 standardTTL interface:Interface type: terminal blockTransmission distance: less than 10mTransmission mode: point-to-pointRS485 interface:Interface type: terminal blockInterface protection: 600W -protection, surge protection and 15KV static protectionTerminal resistance: 120R, which can be switched and enabled through dial switchTransmission distance: about 1200mTransmission mode: point to many (32 nodes at most, and repeaters are recommended for more than 16 nodes)Housing: rail type ABS environment-friendly housing, suitable for 35mm DIN railSize: 91.6 x 58.7 x 23.3mmPackage Contents:1 x TTL TO RS485 (B) converter1 x ScrewdriverOnly the above package content, other products are not included.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.