ICUSB422
Instruction Manual
USB Serial Adapter
USB to RS-422/485 Serial
Adapter Cable
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Table of Contents
Introduction..................................................................... 1
Packaging Contents.....................................................................1
System Requirements.................................................................1
Installation....................................................................... 2
Hardware Installation...................................................................2
Driver Installation.........................................................................2
Verifying Installation.....................................................................3
DIP Switch Settings ........................................................ 3
DB9 Pin Assignment....................................................... 4
Specifications.................................................................. 5
Technical Support........................................................... 6
Warranty Information...................................................... 6
i
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Introduction
Packaging Contents
• 1 x ICUSB422 adapter cable
• 1 x Driver CD
• 1 x Instruction Manual
System Requirements
• Available USB port
• Microsoft Windows® 98SE/ME/2000/XP/Server 2003/Vista/7,
or Linux®
1
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Installation
Hardware Installation
1. Power on the computer and make sure the operating system is fully
loaded.
2. Plug the USB connector on the ICUBS422 adapter cable into an
available USB port on the host computer.
3. The operating system is will automatically detect the new hardware
and prompt for drivers.
4. Once drivers are successfully installed, connect the DB9 connector
to the serial cable for your RS-422/485 device.
Driver Installation
Windows 2000/Server 2003/XP
1. When the Found New Hardware wizard appears on the screen,
insert the Driver CD into your CD-ROM drive. If you are prompted
to connect to Windows Update, please select the “No, not this time”
option and click Next.
2. Select the option “Install Drivers Automatically (Recommended)” and
then click the Next button.
3. Windows should now start searching for the drivers. Once this has
completed, click the Finish button.
Windows Vista/7
1. 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.
2. When prompted to insert the disc, insert the Driver CD that
came with the card, into your CD-ROM drive and Windows will
automatically proceed to search the CD.
3. If a Windows Security dialog window appears, click the “Install this
2
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driver software anyway” option to proceed.
4. Once the driver is installed, click the Close button.
Verifying Installation
Windows 2000/Server 2003/XP/Vista/7
From the main desktop, right-click on “My Computer” (“Computer” in
Vista), then select Manage. In the new Computer Management window,
select Device Manager from the left window panel.
Double-click on the “Ports (COM & LPT)” option. An additional USB
serial COM port should be visible. The port is ready to connect to new
devices.
DIP Switch Settings
Switch
Position
Switch Switch Name
Description
485
(default)
2-wire RS-485 mode
4-wire RS-422 mode
1
2
485/422
422
Transmitting data will be
echoed back.
Echo
Echo/No Echo
No Echo
(default)
No data echo
No Term
(default)
Terminator resistor is
disabled
3
4
No Term/Term
None
Terminator resistor is
enabled
Term
On/Off
3
Switch is not enabled
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* NOTE: In “422” mode, the ECHO setting is not used.
* The Echo mode is useful for detecting if there is data collision
occurring on RS-485. If the echoed data is not equal to the
transmitted data, then data collision is occurring.
DB9 Pin Assignment
DB9 Pin RS-422
RS-485
Data +
Data -
NC
1
2
3
4
5
6
7
8
9
TxD -
TxD +
RxD +
RxD -
GND
NC
NC
GND
NC
NC
NC
NC
NC
NC
NC
4
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Specifications
Bus Interface
USB 2.0
1 x USB type A
1 x 9-pin DB9 male
921.6Kbps
Connectors
Maximum Baud Rate
Termination Resistor
Chipset
120 Ohm
FTDI FT232RL
RS-422 (4-wire)
RS-485 (2-wire)
110mA
Serial Protocol
Power Consumption
Compatible Operating
Systems
Windows 98SE/ME/2000/XP/
Server 2003/Vista/7, or Linux
5
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Technical Support
StarTech.com’s lifetime technical support is an integral part of our
commitment to provide industry-leading solutions. If you ever need
our comprehensive selection of online tools, documentation, and
downloads.
Warranty Information
This product is backed by a one 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 officers, directors, employees or agents) for any damages
(whether direct or indirect, special, punitive, incidental, consequential, or
otherwise), loss of profits, 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.
6
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StarTech.com has been making “hard-to-find easy” since 1985,
providing high quality solutions to a diverse IT and A/V customer
base that spans many channels, including government, education
and industrial facilities to name just a few. We offer an unmatched
selection of computer parts, cables, A/V products, KVM and Server
Management solutions, serving a worldwide market through our
locations in the United States, Canada, the United Kingdom and
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our products and to access exclusive interactive tools such as the
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