StarTech.com CB1S485 User manual

RS-422/485 DB9 CardBus Adapter
CB1S485 Instruction Manual
Actual product may vary from photo
1 Port RS-422/485 DB9 CardBus Adapter

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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 off
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 different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
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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
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Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Hardware Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
UART Input Clock Speed Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
RS-422/485 Mode Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Terminator Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
DB9 Connector Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Driver Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
RS-485 2-wire mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Application Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
RS-485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
RS-422 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Accessory Products from StarTech.com . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Instruction Manual
1
Thank you for purchasing a StarTech.com CardBus RS-422/485 Card. This high
performance RS-422/485 card works well with two-wire (with Auto Transceiver Turn
Around feature, ATTATM) and four-wire configurations and offers 16C950 compliant
UARTs for broad serial device compatibility.
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•RS-485 mode supports Auto Transceiver Turn Around (ATTA)
Features
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System requirements:
•Operating System: Windows 98/ME/NT/2000/XP/2003/VISTA/LINUX
Package contents:
•1 x Serial PCMCIA Card
This package should contain:
•128-byte deep FIFO per transmitter and receiver
•UART is 16C950 compatible to work with most serial devices
•Supports the RS-485 and RS-422 serial interfaces
•Maximum data transfer rate up to 921kbps
•
A host computer with an available CardBus Slot. Please note that CB1394B3 can be
used on a desktop computer, using a PCMCIA to PCI Adapter Card For more
information, please see Accessory Products from StarTech.com.
•1 x Breakout Cable
•1 x Instruction Manual
•1 x Driver CD

Instruction Manual
2
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UART Input Clock Speed Selector
HSPD
Switch
Switch
Name
Switch
Positions Clock Speed
HSPD
(Up)
UART Input Clock
Speed = 1.8432MHZ,
Maximum baud rate is
115.2Kbps
(Down)
(Default)
UART Input Clock
Speed = 14.7456MHZ,
Maximum baud rate is
926.1Kbps (default).
Setting requires
adjustment from
Windows Device
Manager
RS-422/485 Mode Selector
No Echo/
Echo Switch
No Loop/
Loop Switch
422/485
Mode Switch
Switch
Name
Jumper
Positions
Mode and
Termination Resistor
Setting
422
Up
(default)
2-wire RS-485 mode
(Note)
Down 4-wire RS-422 mode
NECH
Up Transmitting data will
be echoed back
Down
(default) No echo data
NLP
Up RTS will be
connected to CTS
Down
(default)
RTS and CTS
operate normally
Please note:
1. Please note that if the mode were set
at “422” mode, the other settings
(NECH and NLP settings) will take no effect.
2. Echo mode is used to detect data collisions.
If the echoed data was not equal to the
transmitted data, then data collisions are
occurring.

Instruction Manual
3
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Terminator Settings
Terminator
Enable/Disable
Switches
Switch
Name
Switch
Settings
Termination Resistor
Setting
TXD
Up
(Default)
TXD Terminator
Disabled
Down TXD Terminator
Enabled
RXD
Up RXD Terminator
Disabled
Down
(Default)
RXD Terminator
Enabled
RTS
Up
(Default)
RTS Terminator
Disabled
Down RTS Terminator
Enabled
CTS
Up CTS Terminator
Disabled
Down
(Default)
CTS Terminator
Enabled
DB9 Connector Pinout
1
9
6
5
9 Pins Signal
1TXD- (DATA-)
2TXD+ (DATA+)
3 RXD+
4RXD-
5GND
6RTS-
7RTS+
8CTS+
9CTS-

Instruction Manual
4
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Caution: It is advisable to remove all possible static discharge potential from
any objects that the ExpressCard may come in contact with before installation.
This can be accomplished by touching a grounded metal object, prior to
insertion.
1. With the notebook PC powered on and fully booted, insert the PCMCIA Card into an
available CardBus slot on the host computer.
2. Connect the 15-pin connector of the cable to your PC card, then connect the DB9
connector to your serial device.
3. The Add New Hardware Wizard will launch and will guide you through the driver
installation process.
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Windows 98, ME, 2000, XP, 2003
Windows NT
Because Windows NT does not support plug and play, you will need to locate the
Install_Serial.exe file (in the E:\IO\OXFORD\WinNT4 folder, where Edesignates the
location of the CD/DVD-ROM drive), and double click on the executable file. Follow the
prompts to complete installation.
The necessary driver files are in ZIP format (e.g. V6515_RS422_485.ZIP) and are
located in E:\IO\OXFORD\RS422_485 (where E: denotes the CD/DVD-ROM drive.
Please copy the file to your local hard drive (presumably C:) and unzip it before
proceeding with installation.
1. When the Found New Hardware Wizard appears, click Next to continue.
2. Select Install from a list or specific location (advanced) and
click Next.
3. Select Include this location in the search and click Browse to
specify the driver’s location.
4. Click Next to continue, then click on Finish to complete installation.

Instruction Manual
5
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To enable CB1S485 to operate in RS-485 2-wire mode:
1. Right-click on My Computer. If you are using Windows 98/ME, select Properties.If
you are using Windows 2000/XP, select Manage.
2. Choose Device Manager and double-click on Ports.
3. You will notice the added ports, listed as a PCI Communications Port. Double-click
on the COM Port you wish to configure, and select Settings.
1. In the PCI Communications Port Properties window, click on the Settings tab.
2. Under Hardware config, select RS422/485, and change the RS485 buffer enable
value to Active Low, using the dropdown box provided. Click OK to save and exit.
Windows 2000, XP
Windows 98, ME
1. In the PCI Communications Port Properties window, click on the Settings tab.
2. Change the DTR function to RS485 Buf_En Active low, using the dropdown box
provided.
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By default, CB1S485 is set to a baud rate of 115.2Kbps (maximum). To increase the
baud rate to 921.6Kbps maximum:
Windows 2000, XP
1. As mentioned on page 2, move the HSPD switch to the down position.

Instruction Manual
6
2. Right-click on My Computer and select Manage.
3. Choose Device Manager and double-click on Ports.
4. You will notice the added port, listed as a PCI Communications Port. Double-click
on the COM Port you wish to configure, select Data rate, click on Detect Crystal
Frequency, then OK.
Windows 98/ME
1. As mentioned on page 2, move the HSPD switch to the down position.
2. Right-click on My Computer and select Properties.
3. Choose Device Manager and double-click on Ports.
4. You will notice the added port, listed as a PCI Communications Port. Double-click
on the COM Port you wish to configure, select Data rate, and put a checkmark next
to Detect Crystal Frequency by clicking in the box provided. Click on OK to save
this setting.
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RS-485 (Transmitter is controlled by ATTATM Hardware)
CB1S485 RS485
Device
Please note: CB1S485 supports
optional auto echo mode
operation. When enabled,
data sent to the connected RS-
485 transmitter is simultaneously
sent to the receiver.
The current application can then
use the “echoed” data to check
for data collisions.

Instruction Manual
7
RS-422 (Transmitter buffer is always enabled)
4-wire Twisted
Pair Cable
Please note: CB1S485 supports 4-wire RS-422 mode, which requires cross-over
twisted pair cable.
CB1S485 also provides two handshaking signals, RTS+/RTS- and CTS+/CTS- to
perform hardware flow control, which requires the following wiring scheme:
CB1S485 RS422
Device

Instruction Manual
8
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Contact your local StarTech.com dealer or visit www.startech.com for cables or other
accessories that will help you get the best performance out of your new product.
MC6MF
6 ft. AT Modem Cable (male to female)
MC3MF
3 ft. AT Modem Cable DB9F-DB25M
MXT100
6 ft. 9-pin Straight Through Cable (male to female)
SCNM925FM
10 ft. Cross Wired Serial/Null Modem Cable DB9F to DB25M
SCNM9FF
10 ft. Cross Wired Serial/Null Modem Cable DB9 F/F
PCI2PCMCIA1
1 Port CardBus/PCMCIA to PCI Adapter Card
PCI2PCMCIA1E
1 Port CardBus/PCMCIA to PCI Adapter

Instruction Manual
9
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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.
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This product is backed by a lifetime 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.
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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.
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Regulatory Certifications ROHS, FCC, CE
Bus Type 32-bit CardBus Type-II Slot
Connectors 1 X DB9 MALE CONNECTOR
Maximum Data Transfer Rate 921 kbps
OS Support Windows 98/ME/NT/2000/XP/2003/VISTA/LINUX
Bits Data Framing Support 5/6/7/8/9

14 August 2007 (Rev. A)
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