USB to Serial RS-232 422 485 Auto Setup Adapter

Special Price


USB-COM-PRO USB to Serial industrial single port RS-232/422/485 Adapter is Software & Hardware configurable with a rugged metal case for industrial applications and optional 5-pin terminal block or DB9 serial port for flexibility of serial connection.

  • Adds one RS-232 Serial Port by connecting to a USB port.
  • Easy installation just plug and play!
  • Power, RxD, TxD LED's on the device


Operating System Compatibility

Works with Windows 10,8,7, Vista, 2003 & XP

This items work with virtually any Operating System!


Works with Red hat, Ubuntu and other Core Distributions.

Mac OS X


Works with OS X.3 OS X.9 and future OS's


Your Android device does not have to be rooted to work.

What are you waiting for? Get it now!

We can have this item shipped and on it's way to you today.


  •     Adds one RS-232 serial port by connecting to a USB port
  •     Plugin converter connecting to a USB port conveniently
  •     Installed as standard Windows COM port
  •     Full RS-232 modem control signals and hardware/software flow control
  •     RS-232 data signals: TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND
  •     High speed serial port with the baud rate up to 921.6K bps
  •     Non-standard baudrates supported
  •     LED status indicators for TxD and RxD for easy port monitoring and diagnostic
  •     Serial port protected with surge protection of 10KV
  •     Powered by USB port, no external power adapter required
  •     Easy plug and play installation and RS-232 device connection
  •     COM port number assigned can be changed to any COM port number required
  •     Works with USB 1.1 & 2.0 host port
The USB-COM-PRO is an ideal USB to Serial device for any RS232, RS422, RS485 application.

Compliance:  USB 1.0/1.1 compliant, USB 2.0 compatible
Speed:  12 Mbps, full-speed USB
FIFO:  128 byte transmit FIFO / 384 receive FIFO
Serial Interface
Port Type:  RS-232/RS-422/RS-485 selectable by software
Number of Ports:     1
Connectors:  One DB9 male and one 5-PIN terminal block
Serial Line Protection
ESD Protection:  10KV
Serial Port Speed
Baudrate:  300 bps to 921.6K bps RS-232
300 bps to 3M bps RS-422/485

Serial Communication Parameters
Data Bits:   5, 6, 7, 8
Stop Bits:  1, 1.5, 2
Parity:  None, Even, Odd, Space, Mark
Flow Control:  RTS/CTS, XON/XOFF

Serial Signals
RS-422  TxD-(A), TxD+(B), RxD+(B), RxD-(A), GND, RTS-(A), RTS+(B), CTS+(B), CTS-(A)
RS-485-4 wire  TxD-(A), TxD+(B), RxD+(B), RxD-(A), GND
RS-485-2 wire  Data-(A), Data+(B), GND

Driver Support

OS:  Windows 7, Vista, 2003, XP (WHQL certified) and 2000
Linux Kernel 2.4 and up built-in support
Power Supply
Input:  Bus-powered
No external power adapter required
Chassis:  SECC metal chassis with DIN rail bracket
Operating Temperature     0 to 55 °C (32 to 131 °F)
Operating Humidity     5 to 95% RH
Storage Temperature     -20 to 75 °C (-4 to 167 °F)
Safety Approvals     CE, FCC

USB-COM-PRO customer
USB-COM-PRO quote from customer

This adapter worked great for my Steno Machine, I am very pleased with the Shopping experience.

- Jessica P.  San Francisco, CA