USB to Serial Adapter StarTech.com ICUSB2321FIS

Name: USB to Serial RS232 Adapter ICUSB2321FIS
Brand: StarTech
SKU: 631722
Price: 169.49 EUR
Availability: InStock

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USB to Serial RS232 Adapter Cable StarTech.com ICUSB2321FIS

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Offer for legal entity, cashless payment. Why is an item available only for a legal entity?
This is due to long delivery times and limited product warranties.

Short description

The StarTech.com USB to Serial RS232 Adapter Cable with Optical Isolation features a 2.5m length, DB-9 and USB A connectors. It provides reliable serial communication with optical isolation for enhanced protection against electrical interference, making it ideal for industrial applications. The compact design ensures easy portability and installation, while the FTDI chipset guarantees compatibility with various operating systems.

Available at price 169.49 €: 16 pcs.

Total available for order: 36 pcs.

Warranty: 2 Years

SKU: 631722

Manufacturer: StarTech

Learn more

Deliver the order:

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to the Customer Service Center at Kengaraga 2b, Riga

08.07.2026 {{selectedOffer.officeDeliveryString}}

free

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Customer service center

2b. Kengaraga str., Riga, Latvia, LV-1063

08.07.2026 {{selectedOffer.officeDeliveryString}}

free

Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!

13.07.2026 {{selectedOffer.courierDeliveryString}}

From 4.99 € (Weight: 0.21 kg)

Parcel couriers

Latvijas Pasts pakomāts / Unisend / DPD Paku skapis / Omniva / Venipak Pickup / Venipak Locker / Latvijas Pasts nodaļa

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From 1.99 €

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Payment Methods:

Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay

Available for private customers at price 216.99 €: 6 pcs.

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Product information

Description

The StarTech.com ICUSB2321FIS USB to Serial RS232 Adapter Cable converts a USB 1.1 or 2.0 port into a DB9 RS232 serial port, providing a 2.5 m cable with DB-9 and USB-A connectors and integrated optical isolation for protection against electrical interference. The adapter uses an FTDI chipset that supports COM retention and broad OS compatibility including Windows, Windows CE, Mac OS and Linux. It is USB powered and designed for connecting, monitoring and controlling serial devices in mixed or industrial environments.

Advantages

The adapter includes optical isolation and surge protection to safeguard sensitive serial equipment from electrical damage. The FTDI chipset offers enhanced compatibility and customization options not commonly available in other adapters. Its USB-powered, compact design eliminates the need for an external power supply, and the 2.5 m cable length provides flexibility for installation.

Suitable for

Connecting industrial PLCs, sensors and controllers to a computer
Serial device monitoring and troubleshooting
Point-of-sale systems and legacy equipment integration
Environments where electrical isolation is required to protect sensitive equipment

Key specifications

Model: StarTech.com ICUSB2321FIS
Interface: USB 1.1/2.0 to RS232 (DB9)
Cable length: 2.5 m
Connector types: USB-A to DB-9 male
Chipset: FTDI (supports COM retention and customization)
Features: Optical isolation and surge protection
Power: USB-powered (no external adapter required)
Compatibility: Windows, Windows CE, Mac OS, Linux
MPN: ICUSB2321FIS
EAN: 065030845373

How to use

Install the appropriate FTDI driver for your operating system if required, connect the USB-A end to an available USB 1.1 or 2.0 port on your computer and attach the DB9 connector to the serial device. Configure the serial port settings (baud rate, parity, data bits, stop bits) in your terminal software or application to match the connected device. The adapter is USB powered and ready for immediate use once drivers are loaded and port settings are configured.

Usage recommendations

For best results in industrial installations, route the 2.5 m cable away from high-voltage lines and heavy electrical equipment. Ensure drivers are kept up to date and verify COM port assignments after connecting multiple USB-to-serial adapters to avoid conflicts.

All features

Weight:: 0.086 kg
Certification:: CE, FCC, Microsoft WHQL
Chipset:: FTDI - FT232RL
Storage temperature (T-T):: -20 - 85
Package weight:: 222 g
Operating temperature (T-T):: 0 - 55
Cable length:: 2.5 m
Relative humidity:: 5 - 95
Height:: 20 mm
Width:: 40 mm
Depth:: 2400 mm
Product colour:: Black
Compatible operating systems:: Windows CE (4.2, 5.0, 6.0), XP Embedded, 98SE, 2000, XP, Vista, 7, 8, 8.1, 10, 11 Windows Server 2003, 2008 R2, 2012, 2012 R2, 2016, 2019 macOS 10.6 to 10.15, 11.0, 12.0, 13.0 Linux Kernel 3.0.x+
Package depth:: 72 mm
Package height:: 20 mm
Package width:: 105 mm
Manual:: Yes
Master (outer) case height:: 336 mm
Master (outer) case width:: 450 mm
USB required:: Yes
Housing material:: Plastic
Gross weight (imperial):: 0.44 lbs
Connector 1:: DB-9
Connector 2:: USB A
Drivers included:: Yes
Isolation:: 2500 kV
Baud rate:: 921.6 Kbit/s
Data bits:: 7, 8
Stop bits:: 1, 2
Parity bit:: Even, Mark, N, Odd, Space
FIFO (First In, First Out):: 256
Connector 1 gender:: Male
Connector 2 gender:: Male
Master (outer) case length:: 525 mm
Products per master (outer) case:: 50 pc(s)
Sustainability compliance:: Yes
Sustainability certificates:: CE, RoHS

Instructions

mmo_11814897_1489499331_3274_18872.pdf

startech-ICUSB2321FIS-631722.pdf

Description

Instructions

mmo_11814897_1489499331_3274_18872.pdf

startech-ICUSB2321FIS-631722.pdf

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Warehouse	Stock	Delivery to the store	Store Price
WH357	6	30.06.2026	216.99 €

Available only for legal entities
Warehouse	Stock	Delivery to the store	Store Price
WH109	16	08.07.2026	169.49 € Best price
WH15	8	22.06.2026 Best delivery	178.49 €
EU9	6	22.06.2026 Best delivery	180.99 €

216.99 €

Stock: 6

Delivery Date: 30.06.2026

Warehouse: WH357

Available only for legal entities

169.49 €

Stock: 16

Delivery Date: 08.07.2026

Warehouse: WH109

178.49 €

Stock: 8

Delivery Date: 22.06.2026 Best delivery

Warehouse: WH15

180.99 €

Stock: 6

Delivery Date: 22.06.2026 Best delivery

Warehouse: EU9

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Customer questions

FAQ

How much does the USB to Serial Adapter StarTech.com ICUSB2321FIS cost, and is it available for purchase?

The price is 169.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 36 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 08.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All StarTech products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized StarTech service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

Where can I download the instructions for USB to Serial Adapter StarTech.com ICUSB2321FIS?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

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