StarTech.com ICUSB2321FIS User manual

Manual Revision: 01/28/2020
For the most up-to-date information, please visit: www.startech.com
DE: Bedienungsanleitung - de.startech.com
FR: Guide de l'utilisateur - fr.startech.com
ES: Guía del usuario - es.startech.com
IT: Guida per l'uso - it.startech.com
NL: Gebruiksaanwijzing - nl.startech.com
PT: Guia do usuário - pt.startech.com
ICUSB2321FIS
1 Port FTDI USB to RS232 Serial Adapter Cable
with Optical Isolation
*actual product may vary from photos

Instruction Manual
FCC Compliance Statement
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment
o and on, the user is encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit dierent from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
Use of Trademarks, Registered Trademarks, and other Protected Names and Symbols
This manual may make reference to trademarks, registered trademarks, and other protected names
and/or symbols of third-party companies not related in any way to StarTech.com. Where they
occur these references are for illustrative purposes only and do not represent an endorsement of
a product or service by StarTech.com, or an endorsement of the product(s) to which this manual
applies by the third-party company in question. Regardless of any direct acknowledgement
elsewhere in the body of this document, StarTech.com hereby acknowledges that all trademarks,
registered trademarks, service marks, and other protected names and/or symbols contained in this
manual and related documents are the property of their respective holders.

Instruction Manual i
Table of Contents
Introduction........................................................................................................ 1
Packaging Contents ......................................................................................................................................................1
System Requirements...................................................................................................................................................1
ICUSB2321FIS View........................................................................................................................................................2
Installation .......................................................................................................... 3
Hardware Installation ...................................................................................................................................................3
Verifying Installation .....................................................................................................................................................5
Pinout................................................................................................................... 5
Specications...................................................................................................... 6
Technical Support .............................................................................................. 7
Warranty Information........................................................................................ 7

Instruction Manual 1
Introduction
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 oered by most other solutions.
Packaging Contents
• 1 x USB to Serial Adapter
• 1 x Driver CD
• 1 x Instruction Manual
System Requirements
• USB enabled computer system with available USB port
• Microsoft® Windows® 2000/XP/Vista/Server 2003/Server 2008 R2/7 (32/64-bit),
Windows CE 4.2 or later, or Apple® Mac OS® 9.x/10.x, or Linux®

Instruction Manual 2
ICUSB2321FIS View

Instruction Manual 3
Installation
Hardware Installation
Windows 2000/XP/Server 2003
1. Plug the USB adapter into an available USB port on the computer.
2. When the Found New Hardware wizard appears on the screen, insert the Driver CD
into your CD/DVD drive. If you are prompted to connect to Windows Update, please
select the “No, not this time” option and click Next.
*screenshots are for reference only
3. Select the option “Install Drivers Automatically (Recommended)” and then click the
Next button.
4. Windows should now start searching for the drivers and install them automatically.
Once this has completed, click the Finish button.
5. If Windows is unable to locate drivers, press the “Back” button or restart the wizard
and select the advanced option to have it search the “USB_to_IO\FTDI” location on
the CD by clicking the “Browse”button and selecting that location.

Instruction Manual 4
Windows Vista/7/Server 2008 R2
1. Plug the USB adapter into an available USB port on the computer.
2. When the Found New Hardware window appears on the screen, click on the “Locate
and install drivers software (recommended)”option. If prompted to search online,
select the “Don’t search online” option.
3. When prompted to insert the disc, insert the Driver CD that came with the card, into
your CD/DVD drive and Windows will automatically proceed to search the CD.
4. If a Windows Security dialog window appears, click the “Install this driver software
anyway” option to proceed.
5. Once the driver is installed, click the Close button.
6. If Windows is unable to locate drivers, press the “Back” button or restart the wizard
and select the option to “Browse the computer” and have it search the “USB_to_IO\
FTDI” location on the CD by clicking the “Browse” button.

Instruction Manual 5
Verifying Installation
Windows 2000/XP/Vista/7
From the main desktop, right-click on “My Computer” (“Computer” in Vista/7), then
select “Manage”. In the Computer Management window, select “Device Manager” from
the left window panel.
Double-click on the “Ports (COM & LPT)” option. Additional COM port(s) should be
visible. The port is automatically sequentially numbered by Windows, but can be
changed through the “Properties” by right-clicking on the port.
Pinout

Instruction Manual 6
Specications
Number of Ports 1
Host Interface USB 2.0
Chipset ID FTDI FT232R
Connectors 1 x USB type A male
1 x 9-pin DB9 male
LEDs N/A
Supported Protocols RS232
Data Bits 7, 8
Stop Bits 1, 2
Parity None, Odd, Even, Mark, Space
Maximum Data Transfer
Rate 921.6 Kbps
Optical Isolation 2500Vrms
Surge Protection 500W (bi-directional)
Enclosure Material Plastic
Operating Temperature 0°C ~ 55°C (32°F ~ 131°F)
Storage Temperature -20°C ~ 85°C (32°F ~ 185°F)
Humidity 5% ~ 95% RH
Cable Length 8ft (2.4m)
Dimensions (LxWxH) 45.0mm x 41.5mm x 22.0mm
Weight 150g
Compatible Operating
Systems
Windows 2000/ XP/ Server 2003/ Vista/
Server 2008 R2/ 7 (32/64-bit), Windows CE 4.2+,
Mac OS 9.x/ 10.x, Linux

Instruction Manual 7
Technical Support
StarTech.com’s lifetime technical support is an integral part of our commitment to provide industry-
leading solutions. If you ever need help with your product, visit www.startech.com/support and
access our comprehensive selection of online tools, documentation, and downloads.
For the latest drivers/software, please visit www.startech.com/downloads
Warranty Information
This product is backed by a two year warranty.
In addition, StarTech.com warrants its products against defects in materials and workmanship for
the periods noted, following the initial date of purchase. During this period, the products may be
returned for repair, or replacement with equivalent products at our discretion.The warranty covers
parts and labor costs only. StarTech.com does not warrant its products from defects or damages
arising from misuse, abuse, alteration, or normal wear and tear.
Limitation of Liability
In no event shall the liability of StarTech.com Ltd. and StarTech.com USA LLP (or their ocers,
directors, employees or agents) for any damages (whether direct or indirect, special, punitive,
incidental, consequential, or otherwise), loss of prots, loss of business, or any pecuniary loss,
arising out of or related to the use of the product exceed the actual price paid for the product.
Some states do not allow the exclusion or limitation of incidental or consequential damages. If
such laws apply, the limitations or exclusions contained in this statement may not apply to you.

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