B&B Electronics USOPTL4, USPTL4 Quick Start Manual

Set DIP Switches

Install Drivers

Loopback Test

Use the included CD to install the converter’s
drivers.

Warning: To prevent installation errors, do not
plug in the hardware until you have already
installed the drivers

After connecting the device you can check
Device Manager to learn which Com port
number was assigned.

Front View

LED
Indicators

Back View

Serial

Connector

USB Port

OFF=left ON=right

Wire the Converter

Product Overview

Check LEDs

DIP Switches

2-Wire RS-485

• All DIP Switches = ON

4-Wire RS-422/485

• RS-422 = All DIP Switches off

• RS-485 = DIP 1 ON, DIP 2, 3 and 4 OFF

• Set DIP switches 1, 3, 4 to ON.

• Set DIP switch 2 to OFF.

• Use HyperTerminal or another terminal

program to confirm passage of data
through converter.

When everything is installed and connected
the LEDs will blink to let you know that data
traffic is passing through the converter

GND

RS-485USOP TL4 or USPT L4

NEG (-)

POS (+)

TDA (-)

TDB (+)

RDA (-)

RDB (+)

GND

2 Wire Set-up

RS-422/485USOP TL4 or USPT L4

TDA (-)

TDB (+)

RDA (-)

RDB (+)

GND

4 Wire Set-up

RDA (-)

RDB (+)

TDA (-)

TDB (+)

GND

DIP Switch Position

Switch OFF ON

1

TD always enabled

(TD 422)

TD only enabled during

data transmission (TD 485)

2

RD always enabled
(ECHO ON)

RD disabled during data
transmission (ECHO OFF)

3

4-wire mode (4-Wire) 2-wire mode (2-Wire)

4

4-wire mode (4-Wire) 2-wire mode (2-Wire)

1

2

3

4

5

Troubleshooting

What baud rates can be used?

Baud rates up to 921 Kbps.

What operating systems
are supported?

Windows 2000, XP, Vista, and Windows 7

Which USB cables can I use?

A one meter (3ft) cable is included. Other lengths can

be purchased separately. The maximum range for

USB is 15 ft. We sell USB extenders if you need to go
further than 15 ft.

Can I get another terminal block
for the USOPTL4?

Yes. The part number is TBKT2.

How can I test the USOPTL4 to make
sure it is working correctly?

Do a loopback test. You can find detailed
instructions at:

http://www.bb-elec.com/bb-elec/literature/
Ulinx_1-2Port_4209qsg.pdf

A quick way to test is to set the dipswitches to 485,
Echo ON, 2 wire, 2 wire. Then use HyperTerminal
to do the loopback. Visit our technical library for

instructions and screen shots:

http://www.bb-elec.com/technical_library.asp

Document number – p/n 8418 r002 USOPTL4-USPTL4 - 1412

© 2012 B&B Electronics Manufa cturing Company

1-888-948-2248 | Europe: [phone]

www.bb-elec.com

Recommended Accessories

4-Port Powered USB Hub

USB Extender

UHR304

GU CE51

707 Dayton Road | PO Box 1040 | Ottawa, IL 61350

Phone: [phone] | Fax: [phone]
www.bb-elec.com | E-mail: [e-mail]

http://www.bb- elec.com/USOPTL4

Fast and easy on the web:

www.bb-elec.com

USOPTL4 or USPTL4

One Meter USB Cable

CD ROM with Drivers

First Things First...

Before you begin, be sure you have
the following:

USB to RS-422/485 Converters

USOPTL4 & USPTL4

Isolated Non-Isolated

http://www.bb- elec.com/USOPTL4/

ACC

http://www.bb- elec.com/USOPTL4/

ACC

Fast, Easy Answers

• First, check step 5.

• Then use your smart

phone to access complete
documentation on our
web site. Simply scan
the code to the right.