From: USB 2.0 / A
 To: 4 x DB-9 (serial)
 USB powered

SKU: UC4854 Categories: , ,

4-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 4 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)?4 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




0,32 kg


( L x W x H )

12.50 x 8.15 x 2.50 cm