1. Adopting the imported FT232RNL+SP485EEN chip scheme, high-speed communication is stable, reliable and compatible 2. On-board TVS (transient voltage suppression tube) can effectively suppress the surge voltage and transient peak voltage in the circuit, and prevent-lightning and static electricity 3. The on-board self-recovery fuse and protection diode can ensure the stable output of current and voltage, prevent over-current and over-voltage, and improve the impact resistance 4. Onboard 15KV ESD isolation protection and 600W lightning-surge protection. 120R terminal resistance of on-board RS485/RS422 interface, enabled by default, can be modified through jumper cap setting Product type: industrial isolated USB to RS485/422 converter; Communication rate: FT232RNL 300bps~3Mbps; Host interface: USB; Equipment interface: RS485/422 USB interface: Working level: 5V Interface type: USB-B interface Interface protection: 200mA self-recovery fuse, ESD static protection Transmission distance: about 5 meters RS485/422 interface: Interface type: terminal block Interface pins: A+, B -, PE Direction control: the hardware automatically determines and controls the data transmission direction Interface protection: provide 600W lightning-protection, surge and 15KV static electricity protection (onboard 120R balance resistance) Transmission distance: about 1200 meters (at low speed) Transmission mode: point-to-many, (up to 32 nodes, and repeaters are recommended for more than 16 nodes) indicator light: PWR: power indicator, connected to USB, red light when voltage is detected TXD: send indicator light, green light when data is sent from USB port RXD: receiving indicator light, blue light when data is sent back from the device interface Use environment: Temperature range: -