# USB to Serial RS232 Adapter Cable StarTech.com ICUSB2321FIS

**URL:** https://aio.lv/en/product--startech-icusb2321fis--631722
**Data updated:** 2025-12-28 21:32 (EET)
**Category:** Serial & Parallel Cables
**Manufacturer:** StarTech
**Manufacturer code:** ICUSB2321FIS
**EAN:** 065030845373
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 169.49 €
**Prices and availability valid until:** 2026-07-05 23:59
**Price without VAT (21%):** 140.07 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--startech-icusb2321fis--631722

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary 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.

## Long 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.

## Specifications

| Feature | Value |
|---|---|
| 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 |

## 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. More information about warranty service: https://aio.lv/en/warranty

### 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.

## Image

https://aio.lv/img/cache/product/631722/56588508_large.webp