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

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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

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

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UART Input Clock Speed Selector

HSPD

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

(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

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Terminator Settings

Terminator

Enable/Disable

Switches

Switch

Name

Switch

Settings

Termination Resistor

Setting

TXD

(Default)

TXD Terminator

Disabled

Down TXD Terminator

Enabled

RXD

Up RXD Terminator

Disabled

Down

(Default)

RXD Terminator

Enabled

RTS

(Default)

RTS Terminator

Disabled

Down RTS Terminator

Enabled

CTS

Up CTS Terminator

Disabled

Down

(Default)

CTS Terminator

Enabled

DB9 Connector Pinout

9 Pins Signal

1TXD- (DATA-)

2TXD+ (DATA+)

3 RXD+

4RXD-

5GND

6RTS-

7RTS+

8CTS+

9CTS-

Instruction Manual

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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

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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

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

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

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