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USB to RS485 / RS422 Converter, PRO

  • Model: XS890
  • In Stock


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Our high quality Pro grade USB to RS485 / RS422 converter optimized for Windows 11, Windows 10 and Windows 8 but will of course also work perfectly fine with Windows 98, 2000, XP and Vista. It is suitable for most applications, including industrial, commercial and any general office computer device.

This particular USB to RS485 converter is designed with a high performance quality processor chip and conversion circuitry which makes it one of the most reliable adapters on the market. It easily lets you connect any RS485 or RS422 device directly to your computer's USB port, without experiencing any troubles like computer freeze, IO problems or any other driver problems.

This USB to RS485 converter / USB to RS422 converter is powered from the computer's USB port so no additional external power source is needed. The RS485 / RS422 end is a standard 9-pin D-sub connector with an optional screw terminal board included for easy connection of cables or single wires.

After installing the included drivers and connecting the converter to your computer's USB port, it will show up as a virtual serial COM port in Windows Device Manager where you can manage and configure it like if it was a standard built-in serial COM port.

It is build around the high-end quality chip FT232BL from FTDI Semiconductors which is one of the best and most reliable USB to RS485 / RS422 converter processors on the market, with a SP485E RS485 / RS422 transceiver from Exar Corporation. Detailed documentation is available in our download section.

Overall features
  • Compatible with all major operating systems
  • Indication LED's for Power, TX and RX
  • Plug and Play USB to RS485 / RS422 Converter
  • Fail-safe bias resistors
  • Guaranteed genuine non-clone FTDI processor chips
    using Windows WHQL certified drivers (beware of clones)
  • No power supply needed
  • No IRQ/ DMA conflicts
  • Automatic send data control
  • Auto detection of data speed
  • Zero delay automatic transmission
  • Terminal board included with each converter

Useful optional accessories
(not included)

Null modem adapter
Null modem adapter

DB9 to RJ45 adapter
DB9 - RJ45 adapter

DB9 gender changer
Gender Changer

Part number XS890
Operating system
  • Windows 11, 10, 8.1, 8 (32/64-bit), Windows Server 2016, Windows Server 2012 / R2, Windows 7 (32/64-bit), Windows Server 2008 R2, Vista (32/64-bit), Windows Server 2008 (32/64-bit), XP, Windows Server 2003 (32/64-bit), 2000, (all WHQL compliant). Windows RT as D2XX drivers only.
  • Windows CE v4.2 - 5.2, 6.0, 7.0 and 2013 including: Windows Mobile 2003, 2003 SE, Windows Mobile 5, 6, 6.1 and 6.5
  • Linux (built into kernel 3.0.0-19 and above)
  • Mac OS 8, OS 9, OS X 10.3 to 10.9 and above
  • Android
Processor FTDI FT232RL
Serial driver Sipex SP485EE
Unique chipID no. Yes, each converter has it own unique ID number which can be accessed by the user with the D2XX driver programmers guide.
RS485 / RS422 Interface DB9 Male / included screw terminal header
RS485 output power 3.60VCD (between D+ and GND)
Fail-safe bias resistors Yes
USB interface Standard Type A Male
Indication LEDs TX, RX and Power
Ports 1-port available for RS485 and RS422 individually
Signals RS485, 2-wire half duplex: D+, D-, GND
RS422, 4-wire full duplex: TX+, TX-, RX+, RX-, GND
Baud rate 300-921.600bps (up to 3Mbps by using alising)
Parity None, Odd, Even, Mark, Space
Data Bits 7, 8
Stop Bits 1, 2
TX / RX buffer size 256 Byte Transmit Buffer / 128 Byte Receive Buffer
Adjustable USB transfer sizes for TX and RX From 64 bytes to 4096 bytes
Adjustable latency timer 1 to 255 msec
Adjustable read and write timeouts 0 to 10000 msec
Flow Control None, Xon/Xoff, Hardware
COM port accessible by Included virtual COM port drivers or FTD2XX.DLL
Special features
  • Compatible with Modbus RTU/ASCII, BACnet
  • Supports non-standard baud rates
  • Automatic Send Control
Electrostatic (ESD) protection 600W surge protection, 15KV static electricity protection
Current draw Static: less than 80mA. Dynamic average: less than 150mA
Interface compliance USB1.1,2.0,3.0, EIA/TIA RS-232
Regulatory compliance FCC, CE and RoHS
Temperatures Operating: -13°F to 158°F (-25°C to 70°C)
Storage: -40°F to 185°F (-40°C to 85°C)
Cable length 56" not including the connectors
Size 54.5mm x 36mm x 16mm
Weight 70g
Warranty 1 year limited warranty

For alternative USB to serial RS485 and RS422 solutions please see our full selection of USB to Serial RS485 converters

Read the Review
Date Added: 11/23/2014 by Ron Julian
5 of 5 Stars!5 of 5 Stars!
I purchased this adapter and two of your other adapters, all works well, thanks.

Read the Review
Date Added: 05/31/2013 by Charlie McKinney
4 of 5 Stars!4 of 5 Stars!
We use 100s of these adapters and they work great, the only thing I have found is sometimes the driv...

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Date Added: 04/13/2013 by Chris Hauser
4 of 5 Stars!4 of 5 Stars!
I ordered this adapter together with the serial device server. Both works without problems and the d...

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Date Added: 07/13/2011 by Thomas Boven
5 of 5 Stars!5 of 5 Stars!
I now understand why there is so much fuss about this adapter. I just received it yesterday and had ...

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Date Added: 02/26/2010 by Jack Brown
5 of 5 Stars!5 of 5 Stars!
Great solid quality with indication LEDs, I used to pay almost double as much for a similar product ...

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Date Added: 01/27/2010 by Ron Miquel
4 of 5 Stars!4 of 5 Stars!
Very satisfied, drivers easily installed and computer recognizes adapter right away.

Read the Review
Date Added: 01/21/2010 by Mike Brooks
5 of 5 Stars!5 of 5 Stars!
Definately worth the money, works perfectly with Windows 7.

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Quick Tip!

The Pro grade USB to RS485 Converter.

Make no mistake here, this is the true and original Pro grade Xetatronix USB to RS485 converter. Some companies are advertising similar looking USB to RS485 converter cables which looks almost the same and even have same or similar part number however the electronics inside the original converter makes the whole difference.

The original Xetatronix USB to RS485 converter is designed around an industry proven high-performance and highly reliable processor chip and conversion circuitry. This is also the reason why the Xetatronix USB to RS485 converter is priced higher than many other USB to RS485 converter cables even these other cables looks the same on the outside.
Another feature worth mentioning regarding this converter is that it has LED indication lights for the TX, RX and Power lines. This will help you troubleshoot and determine if data is actually transferred or received by your serial device.

For alternative serial solutions please see our selection of USB to serial RS485 / RS422 converters.


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