Features Standards: conforming to USBV1.0, 1.1 and 2.0 RS-485,RS-422 TIA/EIA Standard USB signals: VCC, DATA+, DATA-, GND and FG RS-422 Signal: T/R+,T/R-,RXT+,RXD-,GND; RS-485 signals: T/R+,T/R-.GND Working mode: asynchronous working,point-to-point or point-to-multipoint 2 wires (half duplex) 4 wires (full duplex) Single chip USB to asynchronous serial data transfer interface Direction control: Adopt the technology which automatically controls the data-flow direction,automatically distinguish and control the data-transmission direction; Support Bits per second Data transfer rates from 300 baud to 921600baud; UART interface support for 7 or 8 data bits,1 or 2 stop bits and even/odd/mark/space/none Flow control none,hardware and xon/xoff Synchronous and asynchronous bit bang interface options with RD and WR strobes Transmission distance: RS-485/422 port:1.2km (300bps-921600bps).USB port : No more han 5 meters Interface protection: surge protection and ±15KV ESD protection Load capability; Support point-to-multipoint transmission. Each converter can connect 32 RS-422 or RS-485 interface equipment Signal indication: indicator lights for Power (PWR), Send (TXD) and Receive (RXD) Transmission media: twisted-pair cable or shielded cable; Extended operating temperature range; -40 to 85 ℃   Applications USB to UART Cable POS Printer Terminal Networking System Industrial and Power Meter USB Bar Code Reader USB Digital Camera Interface USB Wireless/Wired Modem