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Computer Cabling & Networking Solutions @ Everyday Low Prices!

 ITEM: >   USBG-8COM-PRO > $499.98

8 Port USB to RS-232/422/485 Auto Setup Adapter for Windows & Linux

Color: Silver Size\Length: 10x6x1.75 Part No.USBG-8COM-PRO

This product is End Of Life effective Jan 1, 2018.


The Industrial PRO Line supports flexible RS232/422/485 ports. Each port can be individually configured by software (No Jumper). The ports have standard DB9 male connectors. The metal cases can be easy used for DIN-Rail mounting, the 8- and 16- port versions also fit in a 19" rackmount.

Metal case DIN-Rail mountable RS232/422/485 DB9 male port Terminal block Speed up to 3000kbps External power supply Overview: Serial ports on USB allow further use of existing devices, even when the computer doesn’t offer serial ports. The USB-4COM-PRO is extremely flexible in offered communication standards.

The high speed serial port with the 128 byte FIFO allows high speed communication, even in heavy loaded systems. Unique features reduce the system load. The serial port also allows unusual speed settings like 500.000bps.

Specifications and Features

  • Serial connector : eight DB9 male connectors
  • Power Supply : built-in internal switching power supply
  • Adds high speed RS-232 / 422 / 485 port via USB connection
  • 384 byte receive buffer
  • 128 byte transmit buffer for high speed data throughput
  • Requires no IRQ, DMA, I/O port
  • Serial transmission speed up to 921.6 Kbps
  • Suitable for 4-wire RS-422/485 and 2- wire RS-485 applications
  • Auto receive/transmit control for 2- wire RS-485 half-duplex operation
  • Tx ,Rx Termination resistors installed on-board and easy enable/disable via software utility or console port
  • Tx , Rx BIASing resistors installed on-board and easy enable/disable via software utility or console port
  • Easy operation mode change via software utility or console port
  • RS-232 data signals : DCD, RxD, TxD, DTR, GND, DSR, RTS, CTS, RI
  • RS-422 data signals : Tx-, Tx+, Rx+, Rx-, GND, RTS-, RTS+, CTS+, CTS-
  • RS-485 data signals : Tx-, Tx+, Rx+, Rx-(4 wire), and data-, data+(2 wire)
  • Monitor LEDs of TxD, RxD of each port indicating port status
  • Monitor LEDs of mode indicating serial port operation mode
  • Virtual COM port drivers available for Windows XP/7/8
  • Metal case


  • Serial interface: RS232/422/485 selected by software
  • Ports: 4
  • Speed: up to 921.6kbps RS232, up to 3Mbps RS422/RS485
  • Available Modes: RS232 full duplex RS422 full duplex RS485 4 wire, full duplex RS485 2 wire, half duplex, with echo RS485 2 wire, half duplex, without echo
  • Signals: RS232 TxD, RxD, RTS/CTS, DTR, DSR, DCD, RI, GND RS422 Tx+/-, Rx+/-, GND RS485 2 wire Data+/-, GND RS485 4 wire Tx+/-, Rx+/-, GND USB
  • Interface: USB 2.0
  • Power: External power supply 5V DC
  • Driver: Windows XP, 7, 8 Linux (Kernel 2.4 and up built-in)
  • Connectors: 4 DB9 male
  • Dimensions: 172 x 95 x 29 mm (W x L x H) 184 x 99 x 29 mm with DB9 connector and ears

USB Serial Adapter Drivers (click here)

USB Serial Adapter User Guide (click here)

USB Serial Adapter Installation Guide (click here)

USB Serial Adapter Software Configuration Guide (click here)


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Compatibility:  ITEM DESIGNED and Tested with OPERATING SYSTEM
      Item Works with Windows XP  Item Works with Windows NT 4.0   
TECH NOTES: Windows Vista Certified USB to Serial Adapter! USB PRO Series Software & Hardware Configurable USB-to-Industrial RS-232/422/485 Adapter 12" USB Serial RS-232 Cable for NoteBook/Laptop Users Great FTDI CHip USB to RS-232 Adaptor for GPS/PDA/POS/Modem/Etc.
Manufacturer: USBGEAR
Warranty: ONE YEAR
In-stock: Yes
Size\Length: 10x6x1.75
Color: Silver
Our Low Price $499.98    Quantity Discount: 6 + $487.56 12 + $482.34
Quantity:      ITEM AVAILABLE TO SHIP SAME DAY!   We Accept Visa Master Card And American Express as Well as Purchase Orders!
 Similar Products Available:
 USBG-2COM-PRO...2 Port USB to RS-232/422/485 Auto Setup Adapter for Windows Linux and Mac..$159.98  
 USBG-8COM-PRO...8 Port USB to RS-232/422/485 Auto Setup Adapter for Windows & Linux..$499.98  
 USBG-COM-PRO...USB to RS-232/422/485 Auto Setup Adapter for Windows Linux and Mac..$89.98  

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