Supports USB expansion 8-way TTL (UART) with hardware flow control, capable of simultaneous communication and independent of each other On-board self-restoring fuses and protection diodes ensure stable current and voltage output, prevent overcurrent and overvoltage, and improve impact resistance Onboard TVS protection circuit can effectively suppress surge voltages and transient peak voltages in the circuit, and protect against static electricity On-board level conversion circuit, anti-surge, anti-static, stable and safe communication, on-board TTL serial port 3.3V and 5V level conversion circuit, can switch TTL communication level Aluminum alloy shell, oxidation frosted treatment, CNC numerical control drilling, sturdy and durable, exquisite workmanship, 4 external LED indicators for easy viewing of power supply and signal transceiver status Product type: Industrial grade USB to TTL converter Host interface: USB Device interface: TTL (UART) Communication range: 1200bps ~ 2M USB interface Working level: 5V Interface form: USB-B type interface Interface protection: 200mA resettable fuse, ESD electrostatic protection Power supply interface Interface form: 5V DC power socket Interface protection: anti-overvoltage protection, anti-reverse connection protection TTL(UART) interface Interface form: 50PIN anti-reverse connection interface Interface protection: TVS tube protection, surge and electrostatic protection Serial port TTL level: 3.3V/5V (adjustable) indicator light PWR: Power indicator light, when connected to USB, the red light will turn on when voltage is detected. ACT: status indicator light, green light when driver is detected TXD: Transmit indicator light, lights up when data is sent from the USB port RXD: Receive indicator light, lights