Part # : UC4854
Manufacturer SKU : UC4854
Brand : Aten
Warranty : 2-year Lin Haw warranty + 1 additional year with manufacturer

The ATEN USB-to-Serial RS-485 Hub

Provides an external plug-and-play 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.

Package Contents:

  • 1x USB-to-Serial Hub

  • 1x USB Cable

  • 1x Installation Disk

  • 1x User Manual

  • 1x Quick Start Guide


  • 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



Function UC4854
Device Connections 4
Connectors USB 1 x USB Type B Female (White)
Serial 4 x DB-9 Male (Black)
Power 1 x DC Jack
LDEs Port Status 4 (Green)
Power 1 (Orange)
Data Transfer Rate 115.2 Kbps (max.)
FIFO 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 1.0W
Environment Operating Temp. 0-50 degree C
Storage Temp. -20-60 degree C
Humidity 0-80% RH, Non-condensing
PhysicalProperties Housing Metal
Weight 0.32 kg
Dimensions( L x W x H ) 12.50 x 8.15 x 2.50 cm