All product specifications are subject to change without notice.

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In-line USB Converters

USOPTL4, USPTL4, USO9ML4

Models USOPTL4, USPTL4 and USO9ML4 are USB to one port RS-422/485

converters. Supporting 2-wire RS-485 or 4-wire RS-422/485 communications,

these devices are great for applications requiring long range or multi-drop

capabilities. High retention USB port holds standard USB cables tight.

Models USOPTL4 & USO9ML4 include circuitry with 2000 Volts isolation to

protect against ground loops and voltage spikes. Models USOPTL4 and USPTL4

use pluggable terminal blocks on the RS-422/485 side while Model USO9ML4

uses a DB9 connector on the RS-422/485 side. Two LEDs indicate data transmit

or receive. The converters draw power from the USB port so no power supply is

required.

Simply install the drivers supplied on CD ROM and plug the converter into an

available USB port on your computer or USB hub. The device show ups as an

additional COM port in the Windows Device Manager, and is compatible with

Windows applications.

Universal Serial Bus (USB)

USB has become the connectivity workhorse of today’s PCs, replacing classic

serial ports. But, many commercial and industrial devices still use RS-422/485

interfaces. To connect these devices to modern PCs, you need robust and

reliable conversion solutions. USB ports are becoming more common on

commercial and industrial equipment such as point-of-sale peripherals, medical

devices, scientific instrumentation, laboratory equipment and other devices or in

environments where surges, spikes and ground loops are likely to occur.

RS-485 Control

No special software is required to control the RS-485 receiver or transmit line

driver. The driver is automatically enabled during each byte transmitted in RS-

485 mode. The transmitter is always enabled in RS-422 mode. The receiver

is tri-stated during each byte transmitted in the echo-off mode. The receiver is

always enabled in the echo-on mode. There are 4.7k Ohm pull-up/pull-down

resistors on the RDA and RDB lines. A termination resistor may be added to R16

if needed. See the B+B Smartworx RS-422/RS-485 Application Note (available

on our website) for more information on termination and DC biasing of an RS-

485 network.

• 2000 V RMS Optical Isolation (isolated models)

• Adds a COM Port to Your PC

• LEDs for Transmit and Receive Data Lines

• USB 1.0, 1.1 and 2.0 Compatible (12 Mbps)

• High Retention USB Port

• Powered by USB Port

• Locked Serial Number option (-LS models)

PRODUCT FEATURES

ORDERING INFORMATION

MODEL NO.

ISOLATION

RS-422/RS-485 CONNECTOR

LOCKED

SERIAL

NUMBER?

USOPTL4

2 kV

Pluggable Terminal Block

–

USOPTL4-LS

2 kV

Pluggable Terminal Block

Yes

USPTL4

–

Pluggable Terminal Block

–

USPTL4-LS

–

Pluggable Terminal Block

Yes

USO9ML4

2 kV

DB9 Male Connector

–

ACCESSORIES

TB5P508SR-2PK - 5-position terminal block with strain relief paddle board, 2 pack

Locked Serial Numbers Explained

We configure our single-port USB to serial converters in two ways. In standard

format, each product has a unique serial number. “Locked serial” format uses the

same serial number that is associated with a model type.

If your converter will always be used with the same computer, the standard

serialized model is all you need. If the converter is shared among several

computers, like field service laptops, the locked serial number model lets you plug

and play without having to worry about matching the two.

Description

Serialized

Locked

Serial

Number

Every unit is assigned a unique COM port

✔

-

Same type model numbers shares the same COM port

-

✔

Ideal applications

Fixed

Locations

Field

Service

When ordering Locked Serial Number versions, add a “-LS” to the item

number. Serialized and Lock Serial Number versions sell for the same price.

USOPTL4-USPTL4-USO9ML2_4117ds