From: USB 2.0 / A
 To: 2 x DB-9 (serial)
 USB powered

SKU: UC4852 Categories: , ,

2-Port USB-to -Serial RS-422/485 Hub



The ATEN USB-to-Serial RS-422/485 Hub provides an external plug-and-play RS-422 / RS-485 serial connection for computers, notebooks, laptops, and handheld computing devices that support the USB specification. It provides a quick, simple, and cost-effective solution and is ideal for various communication and automation applications.





  • Easy way to add 2 RS-422/RS-485 serial ports
  • Fully compliant with USB 1.1; USB 2.0 compatible
  • Supports RS-422/RS-485 serial interface
  • Each port can independently switch between RS-422 and RS-485
  • Supports automatic handshake mode
  • Up to 115.2 Kbps data transfer rate for each serial port
  • Dual data buffers for each upstream and downstream data transfer
  • No IRQ, DMA, I/O address resources required
  • Supports hot-swapping and plug-and-play
  • Built-in 16KV ESD protection
  • Supports both bus power and external power
  • Works with cellular phones, PDAs, digital cameras, modems and ISDN terminal adapters
  • OS support – Windows 2000/2003/XP/NT














Device Connections











1 x USB Type B Female (White)?2 x DB-9 Male (Black)?1 x DC Jack

Data Transfer Rate


115.2 Kbps (max.)




16 byte Hardware FIFO


USB Specification


USB 1.1 Compliant; USB 2.0 Compatible


RS-422 Signal


TXD+/-, RxD+/-, RTS+/-,CTS+/-,GND


RS-485 Signal


Data+/-, GND


Data Bit


5, 6, 7, 8


Stop Bit


1, 1.5, 2


Power Mode


Bus Powered; use of Power Adapter is optional


Power consumption




Operating Temp.




Storage Temp.






0-80% RH, Non-condensing








0,30 kg



( L x W x H )


12.50 x 8.15 x 2.50 cm