# USB to Serial RS232 Adapter Cable StarTech 1-Port FTDI with Optical Isolation, DB-9 to USB-A, 2.5 m, Black

**URL:** https://aio.lv/en/product--startech-icusb2321fis--3980702
**Data updated:** 2025-12-29 15:33 (EET)
**Category:** Thermal Paste
**Manufacturer:** StarTech
**Manufacturer code:** ICUSB2321FIS
**EAN:** 0065030845373
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 172.49 €
**Prices and availability valid until:** 2026-07-05 23:59
**Price without VAT (21%):** 142.55 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--startech-icusb2321fis--3980702

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 19.06.2026 | free |
| Pickup points | 26.06.2026 | 1.99 EUR |
| Courier delivery to door | 26.06.2026 | 4.99 EUR |

## Summary description

This StarTech 1-port FTDI USB to Serial RS232 adapter cable provides a DB-9 (RS232) connection to a USB-A port with built-in optical isolation. The 2.5 m black cable supports single-port serial communication for connecting legacy equipment, industrial devices, POS systems and modems to modern computers. Lightweight and compact, it offers protection against ground loops and electrical interference within its operating temperature range (0–55°C).

## Long description

The StarTech ICUSB2321FIS is a 1‑port FTDI USB to Serial RS232 adapter cable that converts a USB-A port to a DB‑9 (RS232) connection. The 2.5 m black cable includes integrated optical isolation and surge protection to protect serial equipment from electrical damage and interference. The adapter uses an FTDI chipset offering COM port retention and broad driver compatibility for Windows, Windows CE, Mac OS and Linux.
Advantages
Integrated optical isolation and surge protection reduce the risk of damage from ground loops and voltage transients when connecting industrial and legacy serial devices. The FTDI chipset provides reliable driver support, COM retention and customization options not commonly available in other adapters. The cable is USB‑powered, lightweight and portable, requiring no external power supply.
Suitable for
Connecting legacy equipment with RS232 (DB‑9) ports to modern computers
Industrial control devices and sensors that require electrical isolation
Point‑of‑sale systems, modems and serial consoles
Key specifications
Model: ICUSB2321FIS
Interface: USB‑A to DB‑9 (RS232)
Port count: 1
Cable length: 2.5 m
Isolation: Optical isolation and surge protection
Chipset: FTDI
Operating temperature: 0–55 °C
Colour: Black
Weight: 0.086 kg
How to use
Install the appropriate FTDI driver for your operating system if required. Connect the USB‑A end to the host computer and the DB‑9 connector to your serial device. The cable is USB‑powered and does not require an external power adapter. Confirm the COM port assignment in your system’s device manager or serial communication software and configure baud rate and serial settings to match the connected device.
Usage recommendations
Use this adapter when electrical isolation is needed to protect sensitive or costly serial equipment. Avoid operating outside the specified temperature range (0–55 °C) and ensure secure DB‑9 connections to maintain reliable serial communication.

## Specifications

| Feature | Value |
|---|---|
| Chipset | FTDI - FT232RL |
| Cable length | 2.5 m |
| Relative humidity | 5 - 95 |
| 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+ |
| Manual | Yes |
| 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 | N, Even, Mark, Odd, Space |
| FIFO (First In, First Out) | 256 |
| Connector 1 gender | Male |
| Connector 2 gender | Male |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.086 kg |
| Height | 20 mm |
| Width | 40 mm |
| Depth | 2400 mm |

### Features

| Feature | Value |
|---|---|
| Certification | CE, FCC, Microsoft WHQL |
| Storage temperature (T-T) | -20 - 85 |
| Operating temperature (T-T) | 0 - 55 |
| Product colour | Black |

### Technical details

| Feature | Value |
|---|---|
| Sustainability compliance | Yes |
| Sustainability certificates | RoHS, CE |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 222 g |
| Package depth | 72 mm |
| Package height | 20 mm |
| Package width | 105 mm |

### Logistics data

| Feature | Value |
|---|---|
| Master (outer) case height | 336 mm |
| Master (outer) case width | 450 mm |
| Master (outer) case length | 525 mm |
| Products per master (outer) case | 50 pc(s) |

## FAQ

### How much does the USB to Serial RS232 Adapter Cable StarTech FTDI 1-Port cost, and is it available for purchase?

The price is 172.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 32 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 19.06.2026 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: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can USB to Serial RS232 Adapter Cable StarTech FTDI 1-Port be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, operating temperature (t-t), product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for USB to Serial RS232 Adapter Cable StarTech FTDI 1-Port?

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/3980702/56508888_large.webp