StarTech.com 1 Port FTDI USB to Serial RS232 Adapter Cable with Optical Isolation

Manufacturer: Startech | Model: ICUSB2321FIS | Product ID: 4201 | Warranty: 2 Years
£113.61 (inc. VAT)
4 in stock
100% Money Back Guarantee - Risk Free

Product Technical Specification

Ports & interfaces
Connector 1DB-9
Connector 2USB A
Connector 1 genderMale connector
Connector 2 genderMale connector
Cable length2.5
Performance
Product colourBlack
Housing materialPlastic
USB requiredYes
ChipsetFTDI - FT232RL
Data bits7,8
Stop bits1,2
Baud rate921.6
Parity bitEven,Mark,N,Odd,Space
Isolation2500
FIFO (First In, First Out)256
CertificationCE, FCC, Microsoft WHQL
Compatible operating systemsWindows 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+
Operational conditions
Operating temperature (T-T)0 - 55
Storage temperature (T-T)-20 - 85
Relative humidity5 - 95
Sustainability
Sustainability complianceYes
Sustainability certificatesCE,RoHS
Weight & dimensions
Width40
Depth2400
Height20
Weight86
Packaging data
Package width105
Package depth72
Package height20
Package weight222
Packaging content
ManualYes
Drivers includedYes
Logistics data
Products per master (outer) case50
Master (outer) case width450
Master (outer) case length525
Master (outer) case height336
Other features
Gross weight (imperial)0.44

Delivery Options

Economy Delivery
FREE
Economy Delivery

Economy Delivery (UK)

Estimated delivery date: Wed 26th Aug 2026 to Sat 29th Aug 2026
Business Express
£6.95
Business Express

Business Express

Estimated delivery date: Tue 25th Aug 2026 to Thu 27th Aug 2026
View all Delivery Options & International Rates
The ICUSB2321FIS 1-Port FTDI USB to Serial RS232 Adapter Cable with Optical Isolation converts an available USB 1.1 or 2.0 port into an RS232 DB9 port that can be used to connect, monitor and control your serial devices.

The USB to serial adapter features integrated optical isolation circuits and surge protection to protect your critical, sensitive control equipment against electrical damage, making it a viable solution for costly industrial serial devices.

The versatile FTDI chipset also supports COM retention, additional customization/features, and compatibility not offered by most other solutions. Broad operating system compatibility including Windows®, Windows CE, Mac OS and Linux, makes this product easy to integrate into mixed environments.

Backed by a StarTech.com 2-year warranty and free lifetime technical support.

The StarTech.com Advantage
- Circuit isolation provides electrical protection for sensitive, and often expensive industrial equipment
- Portable USB-Powered design requires no bulky power adapter or outlet
- The FTDI chipset driver is highly customizable and broadly compatible, making it the ideal solution for any setup
Ports & interfaces
Connector 1DB-9
Connector 2USB A
Connector 1 genderMale connector
Connector 2 genderMale connector
Cable length2.5
Performance
Product colourBlack
Housing materialPlastic
USB requiredYes
ChipsetFTDI - FT232RL
Data bits7,8
Stop bits1,2
Baud rate921.6
Parity bitEven,Mark,N,Odd,Space
Isolation2500
FIFO (First In, First Out)256
CertificationCE, FCC, Microsoft WHQL
Compatible operating systemsWindows 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+
Operational conditions
Operating temperature (T-T)0 - 55
Storage temperature (T-T)-20 - 85
Relative humidity5 - 95
Sustainability
Sustainability complianceYes
Sustainability certificatesCE,RoHS
Weight & dimensions
Width40
Depth2400
Height20
Weight86
Packaging data
Package width105
Package depth72
Package height20
Package weight222
Packaging content
ManualYes
Drivers includedYes
Logistics data
Products per master (outer) case50
Master (outer) case width450
Master (outer) case length525
Master (outer) case height336
Other features
Gross weight (imperial)0.44

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Buykingston order despatch times:

We will despatch your order the very same day if we receive cleared payment by 12:00 pm Mon-Fri.

These delivery estimates apply when you order up to 12:00 pm Mon-Fri (excluding public holidays).

We charge a one off delivery cost as outlined below regardless of how many items you order or the weight of your order.

Estimated delivery times are provided to us by the respective delivery companies. We pass this information onto you, the customer.

Despatch times do not apply to UK public holidays.

Estimated delivery times are taken from the next available working day available for delivery. For example if an order was despatched on a working Wednesday by 3pm, the first available working day for delivery would be Thursday provided you placed your order by 3pm on the Wednesday. If the next available weekday is a UK bank holiday/public holiday then your order will be despatched on the next available working day.

Our warehouse reserves the right to upgrade the delivery method you select on your order.

Our available delivery options*

Contact us for a shipping quote.

*All delivery times are estimated unless stated.

Product Returns Note

Buykingston offers a simple, hassle-free returns policy. If for whatever reason you are not happy with the item purchased, you can return it to us within 14 days of receipt for a refund. This applies to items purchased direct through Buykingston only.

Our 14 Day Returns Money Back Guarantee:
For items returned in resaleable condition, with all original packaging. If an item has been opened for inspection but shows signs of use beyond that, a deduction may apply to reflect the reduced value — see our full Terms & Conditions (Section 12) for details.

Some items are excluded from our money-back guarantee unless they have developed a fault. These include:

- Headphones
- Earphones
- Custom made and designed products, such as flash memory products with custom logos on them, e.g. USB flash drives and memory cards with your own logo

Returns FAQs

What is your returns criteria?
14 days from date of receipt, or expected date of receipt on non-tracked items.

How do I go about returning my order?
Please contact us via our contact page with your order number. We will provide you with an RMA number and return instructions, including your return deadline and whether a freepost label applies to your order.

Do I need to contact you before returning my order?
Yes, to obtain an RMA number before sending anything back.

Does my item have to include its original packaging?
Yes, to qualify for our 14 day money-back guarantee. For faulty items, we understand you may no longer have the original packaging.

Who pays for return postage?
If your item is faulty, damaged, or not as described, we cover reasonable return postage, or provide a freepost label where available. If you are returning an item for another reason (including simply changing your mind), you are responsible for return postage unless we have expressly confirmed a freepost label in your RMA email — we recommend using a tracked and insured service for items of significant value.

Who deals with the warranty on a faulty item?
We will. In some circumstances we may ask you to contact the manufacturer directly for assistance.

Please ensure you have read and comply in full with Sections 11–13 of our Terms & Conditions.