USB to Serial RS232 Adapter Cable StarTech FTDI 1-Port

Name: USB to Serial RS232 Adapter ICUSB2321FIS
Brand: StarTech
SKU: 3980702
Price: 172.49 EUR
Availability: InStock

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

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Short 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).

Available at price 172.49 €: 16 pcs.

Total available for order: 32 pcs.

Warranty: 2 Years

SKU: 3980702

Manufacturer: StarTech

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From 4.99 € (Weight: 0.09 kg)

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Product information

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

Weight:: 0.086 kg
Operating temperature (T-T):: 0 - 55
Product colour:: Black

All features

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

Weight:: 0.086 kg
Height:: 20 mm
Width:: 40 mm
Depth:: 2400 mm

Features

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

Technical details

Sustainability compliance:: Yes
Sustainability certificates:: RoHS, CE

Packaging data

Package weight:: 222 g
Package depth:: 72 mm
Package height:: 20 mm
Package width:: 105 mm

Logistics data

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)

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Instructions

mmo_11814897_1489499331_3274_18872.pdf

startech-ICUSB2321FIS-3980702.pdf

Description

Instructions

mmo_11814897_1489499331_3274_18872.pdf

startech-ICUSB2321FIS-3980702.pdf

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Warehouse	Stock	Delivery to the store	Store Price
WH94	16	18.06.2026 Best delivery	172.49 €
WH354	16	29.06.2026	174.49 €

172.49 €

Stock: 16

Delivery Date: 18.06.2026 Best delivery

Warehouse: WH94

174.49 €

Stock: 16

Delivery Date: 29.06.2026

Warehouse: WH354

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Customer questions

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 18.06.2026 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. We work with leading banks and leasing companies in Latvia, allowing you to make your purchase on convenient terms — with a minimal down payment and a repayment period from 3 to 36 months. You can apply for credit or installments for the USB to Serial RS232 Adapter Cable StarTech FTDI 1-Port online, and the application process is as simple as possible:

Select the product on the website and add it to your cart;
When placing your order, choose the payment method “Installments”;
Fill in the required details for the lending partner;
Receive a decision within a few minutes.

For more information about available payment options, interest-free installment terms, and credit conditions in Latvia, please visit the Payment page.

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.

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.

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