StarTech.com ICUSB422IS User manual

Manual Revision: 11/11/2011

For the most up-to-date information, please visit: www.startech.com

DE: Bedienungsanleitung - de.startech.com

FR: Guide de l'utilisateur - fr.startech.com

ES: Guía del usuario - es.startech.com

IT: Guida per l'uso - it.startech.com

NL: Gebruiksaanwijzing - nl.startech.com

PT: Guia do usuário - pt.startech.com

ICUSB422IS

1 Port Industrial USB to RS422/RS485 Serial

Adapter

*actual product may vary from photos

Instruction Manual

FCC Compliance Statement

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 o 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 dierent from that to which the receiver

is connected.

• Consult the dealer or an experienced radio/TV technician for help.

Use of Trademarks, Registered Trademarks, and other Protected Names and

Symbols

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

Table of Contents

Introduction ...........................................................................................1

Features ........................................................................................................................................................ 1

Package Contents ..................................................................................................................................... 1

Hardware Guide .....................................................................................2

Front Panel................................................................................................................................................... 2

Rear Panel .................................................................................................................................................... 2

Switch Settings.......................................................................................3

Switch Description.................................................................................................................................... 3

Installing Drivers ....................................................................................4

Male DB9 Pin Assignments and Cable Wiring....................................5

DB9-Male Pin Assignment ..................................................................................................................... 5

5-Pin Terminal Blocks Pin Assignment............................................................................................... 5

RS-422 Cable Wiring................................................................................................................................. 6

RS-485 Cable Wiring................................................................................................................................. 6

Specications..........................................................................................7

Technical Support ..................................................................................8

Warranty Information............................................................................8

Instruction Manual

Introduction

Thank you for purchasing the ICUSB422IS USB to RS422/485 Converter with Isolation.

This unit is an intelligent expansion module that connects to a PC or server via the

Universal Serial Bus (USB), providing high-speed serial connectivity. The RS485 port

supports Auto-Tranceiver-Turn-Around, to support applications that control the

transmitter driver. With the included software kit, it is an ideal solution for the most

critical applications.

Features

• Compatible with both USB 2.0 and USB 1.1

• Wall mountable design

• Optical Isolation and Surge Protection (2500 Vrms)

• Provides one RS422/485 port while powering the device through USB

• RS-485 mode supports Auto Transceiver Turn Around (ATTA)

• RS422/485 Baud rate up to 921.6 Kbps

• Supports 4-wire RS422 and 2-wire RS485 applications

• Supports DB9 and terminal block connector

Package Contents

• 6ft USB A to B Cable

• Driver CD

• USB to RS422/485 Converter

• User Manual

Instruction Manual

Hardware Guide

Front Panel

Note: The DB9 Male Connector at the Terminal Blocks are connected to

the same signals internally. They are not two individual ports. As such,

the signals coming from the Terminal Blocks and the DB9 connector are

identical

Rear Panel

RXD (down) and TXD

(up) Activity LEDs

DB9 Male Connector

5-Pin Terminal Blocks

RS422/485

DIP Switch Settings

To USB Host Port

Instruction Manual

Switch Settings

The default settings on the ICUSB422IS are set at 2-wire RS-485 mode. If you require

RS422, change the mode pin to the “422” position (ON). Maintain all other settings

unchanged.

Switch Description

Note: If the mode is set to 422, the ECHO setting will take no eect. The echo mode

is useful for the program to detect if the RS-485 bus were in a collision. If the echoed

data is not equal to the transmitted data, then the bus has been in a collission.

Switch

Pin #

Switch

Function

Switch

Positions Description

1RS-485 (OFF)

(Default) 2-wire RS-485 mode

RS-422 (ON) 4-wire RS-422 mode

ECHO (OFF) Transmitting data will be echoed

back

NO ECHO (ON)

(Default) No echo data

3NO TERM (OFF)

(default) Termination Resistor is Disabled

TERM (ON) Termination Resistor is Enabled

4RVD (OFF) Reserved for Future Use

(ON) Reserved for Future Use

Instruction Manual

Installing Drivers

The RS-422/485 Adapter Cable can be hot-plugged to the USB port of your computer

according to the USB specications. It supports Linux, Mac OS 9.8, X, and X (intel),

Windows 98 ME, 2000, 2003, XP, and Vista™. The drivers for each can be found in the

corresponding folder on the driver CD. If you are installing drivers for Windows 98, ME,

200, 2003, XP, or Vista™, Specify your CD-ROM drive and the location according to the

following folder list:

Instruction Manual

Male DB9 Pin Assignments

and Cable Wiring

DB9-Male Pin Assignment

5-Pin Terminal Blocks Pin Assignment

Pins Signal

1 TXD- (DATA-)

2 TXD+ (DATA+)

3 RXD+

4 RXD-

5 GND

6 NC

7 NC

8 NC

9 NC

NC= No Connection

Instruction Manual

RS-422 Cable Wiring

DB9 (RS422 to USB Cable) DB9 (RS422 Device)

1. TXD- 1. TXD-

2. TXD+ 2. TXD+

3. RXD+ 3. RXD+

4. RXD- 4. RXD-

5. GND 5. GND

RS-485 Cable Wiring

DB9 (RS485 to USB Cable) DB9 (RS485 Device)

1. DATA- 1. DATA-

2. DATA+ 2. DATA+

3. NC 3. NC

4. NC 4. NC

5. GND 5. GND

Instruction Manual

Specications

Type Specications

Connectors USB type B, DB9 Male

Number of Ports 1 RS422/485 (for DB9M or

Terminal Blocks)

RS-422 Signals TXD+, TXD-, RXD+, RXD-,

GND

RS-485 Signals (2-wire) DATA+, DATA-, GND

Baud Rate 300 bps to 921.6Kbps

Data Bits 7,8

Stop Bits 1, 2

Parity None, Even, Odd, Mark,

Space

Isolation 2500Vrms

Surge Protection 500Watts

Power Requirements 5V/200mA (USB Bus

Powered)

Operating Temperature 0 to 55°C(32 to 132°F)

Operating Humidity 5 to 95% RH

Storage Temperature -20 to 85°C (-4 to 185°F)

Table of contents

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