3M Touch Screen Controller SC400 Reference Guide

™

3M

MicroTouch

Controller RX141

Reference Guide

Formerly

SC400 USB Resistive

™

Read and understand all safety information

contained in this document before using this product.

3

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2 3M™ MicroTouch™ Controller RX141 Reference Guide

The information in this document is subject to change without notice. No part of this document may be reproduced or transmitted
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copyrights, or other intellectual property except as expressly provided in any written license agreement from 3M Touch Systems,
Inc.

The information provided in this document is intended as a guide only. For the latest detailed engineering specifications, please
contact your 3M Touch Systems, Inc. Application Engineer. 3M Touch Systems, Inc. is committed to continually improving
product designs. As a result, product specifications may be subject to change without notification.

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following maximum concentration values in any homogeneous material, unless the substance is in an application that is exempt
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diphenyl ethers; or (b) 0.01% (by weight) for cadmium. This information represents 3M’s knowledge and belief, which may be
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NOTICE: Given the variety of factors that can affect the use and performance of a 3M Touch Systems, Inc. product (the
“Product”), including that solid state equipment has operation characteristics different from electromechanical equipment, some
of which factors are uniquely within User’s knowledge and control, it is essential that User evaluate the 3M Touch Systems, Inc.
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© 3M 2004-2009 All rights reserved.
Document Title: 3M

TM

MicroTouchTM Controller RX141 Reference Guide

Document Number: 19-271, Version 03
3M, the 3M logo, MicroTouch, and the MicroTouch logo are either registered trademarks or trademarks of 3M in the United

States and/or other countries.
Windows and/or other Microsoft products referenced herein are either registered trademarks or trademarks of Microsoft

Corporation in the U.S. and/or other countries.
All other trademarks are the property of their respective owners.

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3M™ MicroTouch™ Controller RX141 Reference Guide 3

Contents

Introduction

What You Need to Know...........................................................................................5

Important Safety Information.....................................................................................5

3M Touch Systems Support Services.........................................................................6

Contact 3M Touch Systems .......................................................................................7

Chapter 1 Integrating the RX141 Controller

Overview of the RX141 Controller............................................................................9

Handling and ESD Protection ..................................................................................10

Establishing the Data Connection ............................................................................10

Mounting the Controller...........................................................................................11

Supplying Power to the Controller...........................................................................11

Sensor Cable Connector...........................................................................................11

Turning On Your System.........................................................................................12

Status Light (LED) Diagnostics...............................................................................12

What's Next? ............................................................................................................13

Chapter 2 RX141 Controller Communications

Overview of USB Firmware Communications ........................................................15

Communication Basics.............................................................................................16

Receiving Reports from the Controller ....................................................................16

HID and Packed Touch Reports...............................................................................16

USB Command Set ..................................................................................................18

Set Feature – Set Asynchronous Report...................................................................19

Set Feature – Calibration..........................................................................................20

Get Feature – Get Status...........................................................................................23

Set Feature - Reset....................................................................................................25

Set Feature - Restore Defaults..................................................................................25

Set Feature - Set Controller Number........................................................................26

Get Feature – Get Controller Number......................................................................27

Appendix A RX141 Controller Specifications

Technical Specifications...........................................................................................30

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3M™ MicroTouch™ Controller RX141 Reference Guide 5

Introduction

3M Touch Systems offers several advanced controllers designed for reliability and easy
installation. Each controller provides superior performance and delivers excellent
stability, sensitivity, accuracy, and fast response.

This reference guide, designed for developers of touch systems, provides installation and
configuration information for the 3M™ MicroTouch™ RX141 controller. This document
includes information on integrating the RX141 controller into your design,
communicating with the controller, installing the MT 7 software user interface, and
troubleshooting setup problems. It also includes a complete description of the firmware
commands and controller specifications.

3M Touch Systems is committed to being a premier supplier in touch systems throughout
the world. As a 3M Touch Systems customer, you are aware that we have strong internal
programs that meet or exceed environmental regulations of our customers and the regions
in which we conduct business.

What You Need to Know

This document assumes you are familiar with firmware commands and how to use them.
Executing some commands may alter the performance of your touch product. You should
be aware of the results of using these commands before executing them.

Important Safety Information

Read, understand and follow all safety information before using this product. Follow all
instructions marked on the product and described in this document. Pay close attention to
the following installation warnings and safety precautions.

Intended Use

The RX141 controller was designed to enable touch in conjunction with other 3M™
MicroTouch™ products. This controller is intended for internal mounting only and is
not suitable for use in hazardous locations.

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6 3M™ MicroTouch™ Controller RX141 Reference Guide

Explanation of Signal Word Consequences

WARNING: Indicates a potentially hazardous situation, which, if not avoided,

could result in death or serious injury and/or property damage.

CAUTION: Indicates a potentially hazardous situation, which, if not avoided,

may result in minor or moderate injury and/or property damage.
CAUTION: Indicates a potentially hazardous situation, which, if not avoided, may
result in property damage.

WARNING

To reduce the risk of fire and/or explosion which could result in serious injury or
death:

Do not install or use this product in a hazardous location.

To reduce the risk of fire and/or explosion which could result in serious injury or
property damage:

Do not use this product in any outdoor environment unless NEMA standards (or
similar standards such as IP rating) are followed.

To avoid the risk of electric shock which could result in serious injury or death:

• Do not use a damaged power supply.

• Do not use a power cord that is frayed or otherwise damaged.

CAUTION

To reduce the risks associated with improper disposal, which if not avoided may
result in minor or moderate injury from ground water contamination:

Dispose of components in accordance with federal, state and local regulations.

To reduce the risk of possible environmental contamination which may result in
minor or moderate injury:

Dispose of the display in accordance with federal, state and local regulations.

To reduce the risk of the potentially hazardous situations associated with the use
of isopropyl alcohol which may result in minor or moderate injury or property
damage:

Follow all instructions and recommendations in the manufacturer's Material Safety
Data Sheet and product label.

3M Touch Systems Support Services

3M Touch Systems provides extensive support services through our website and
technical support organization. Visit the 3M Touch Systems website at

http://www.3M.com\touch

regularly updated technical documentation on 3M™ MicroTouch™ products, and learn
more about our company.

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, where you can download touch software and drivers, obtain

3M™ MicroTouch™ Controller RX141 Reference Guide 7

Whenever you contact Technical Support, please provide the following information:

• Display size, part number and serial number

• Current driver version

• Operating system used

• Information on additional peripherals

Technical Support is available Monday through Friday 8:30 a.m. to 5:30 p.m. with
limited call back service after 5:30 p.m. until 8:00 p.m. US Eastern Standard Time – 9
a.m. to 5 p.m. throughout Europe.

You can contact 3M Touch Systems Technical Support (US only -- Eastern Standard
Time) by calling the hot line, sending email or a fax.

• Technical Support Hot Line: 978-659-9200

• Technical Support Fax: [phone]

• Toll Free: 1-866-407-6666 (Option 3)

• Email: [e-mail]

Contact 3M Touch Systems

Contact information for all offices can be found on our website at:

http://www.3M.com\touch/

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3M™ MicroTouch™ Controller RX141 Reference Guide 9

CHAPTER 1

Integrating the RX141 Controller

The 3MTM MicroTouch™ RX141 controller is an accurate, small outline, low cost,
temperature stable controller capable of supporting a wide range of resistive sensors. It is
designed for internal mounting in OEM applications.

This chapter covers the following RX141 controller specifications:

• Cable connections

• Mounting requirements

• Power requirements and options

• Status LED codes

Overview of the RX141 Controller

The RX141 controller is an uncased device using a USB interface.
To integrate and test the RX141 controller, you need the following items:

• A 4-wire resistive sensor.

• A method of establishing the USB communication between the controller and your

system. The standard 3M™ MicroTouch™ USB communications cable
(P/N7319420) is recommended.

• A software utility or driver with a calibration routine.

Note: You can use MicroTouch™ Software, which includes the touch driver and
utilities software.

The controller measures 1.3 x 2.4 inches, or 1.3 x 2.7 inches total profile over the
connectors. Allow additional clearance for the mating connectors. The total height profile
is 0.40 inches from the thru hole pins on the trace side of the board to the top of the
highest component on the opposite side. The RX141 has a 4-pin sensor connector (JP6),
and a 5-pin USB cable connector (JP7).

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10 3M™ MicroTouch™ Controller RX141 Reference Guide

Figure 1. RX141 Controller Overall Dimensions

Handling and ESD Protection

When mounting the sensor and controller, use normal precautions for handling
electrostatic sensitive devices. The RX141 has internal protection to ±20 kV for ESD air
discharges to the sensor (not to the controller directly) that may occur during normal
operation of the sensor. Refer to Appendix A for further specifications.

Establishing the Data Connection

The RX141 controller requires a 3M™ MicroTouch™ USB communication cable (P/N

7319420) PC 99 compatible or an equivalent interconnect. One end of this cable plugs
into the USB connector (JP7) on the RX141 controller. The other end, which has a Type­A connector, plugs into a USB port on your PC.

When creating a custom cable, use the Molex 51004-0500 mating connector. Table 1
describes the interconnections of the 3M™ MicroTouch™ USB cable.

Table 1. USB Cable for RX141 Controllers

PC Side (USB Type A) Wire Controller Side (5-Pin Molex)
Pin USB Assigned Color Pin Description

1 +5Vdc Red 1 +5Vdc Input Power
2 Data (DN) Gray 2 Data (DN) Differential Pair
3 Data (DP) Green 3 Data (DP) Differential Pair
4 0V Black 4 Power Return
5 Cable Shield Shell Charcoal

Gray

5 Outer Cable Shield around signal and

power lines. Chassis (earth) ground

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