contained in this document before using this product.
The information in this document is subject to change without notice. No part of this document may be reproduced or
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please contact your 3M Touch Systems Application Engineer. 3M Touch Systems is committed to continually improving
product designs, as a result, product specifications may be subject to change without notification.
NOTICE: Given the variety of factors that can affect the use and performance of a 3M Touch Systems 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
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IMPORTANT NOTICE TO PURCHASER: Specifications are subject to change without notice. These 3M Touch
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legal theory asserted.
Document Title: SC500 USB Resistive Controller Reference Guide
Document Number: 19-275, Version 1.0
MicroTouch, the MicroTouch logo, and ClearTek are either registered trademarks or trademarks of 3M in the United States
and/or other countries.
IBM is a registered trademark of International Business Machines Incorporated.
Microsoft, Windows, and Windows NT are registered trademarks or trademarks of Microsoft Corporation.
All other trademarks are the property of their respective owners.
3M Touch Systems Proprietary Information
Contents
Overview
What You Need to Know......................................................................................5
Important Safety Information................................................................................ 5
3M Touch Systems Support Services ...................................................................6
3M Touch Systems Worldwide Offices................................................................ 7
Chapter 1 Integrating the SC500 USB Controller
Overview of the SC500 Touch Screen Controller ................................................ 9
Handling and ESD Protection............................................................................. 10
Establishing the Data Connection.......................................................................10
Mounting the Controller...................................................................................... 11
Supplying Power to the Controller...................................................................... 11
Mounting the Touch Screen................................................................................ 12
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 manual, directed to developers of touch screen systems, provides
installation and configuration information for the small outline 3M Touch Systems
SC500 USB touch screen controller. This document includes information on
integrating the SC500 USB controller into your design, communicating with the
controller and troubleshooting setup problems. It also includes a complete description
of the firmware commands, a guide to interpreting status LED conditions, and
controller specifications.
What You Need to Know
This document assumes you are familiar with USB 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 and understand 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 SC500 USB controller was designed to enable touch in conjunction with other
3M Touch Systems products. This controller is not designed for use in hazardous
locations.
WARNING
To avoid the risk of fire and/or explosion which could result in serious injury or
property damage:
Do not install or use this product in a hazardous location.
Do not use this product in any outdoor environment unless NEMA standards are
followed.
3M Touch Systems Proprietary Information
6 SC500 USB Controller Reference Guide
CAUTION
To reduce the risks associated with the improper disposal of the controller board,
which if not avoided may result in minor or moderate injury from ground water
contamination:
• Dispose of the controller board in accordance with local, state and federal regulations.
Explanation of Symbols
Attention: Read accompanying documentation
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.3mtouch.com/
drivers, obtain regularly updated technical documentation on 3M Touch Systems
products, and learn more about our company.
Note that if you purchased this product from another company, contact them before
contacting 3M Touch Systems.
, where you can download touch screen software and
Whenever you contact Technical Support, please provide the following information
(if applicable):
• Part number and serial number from your touch system
• Current driver version
• Operating system used
• Information on additional peripherals
Technical Support is available Monday through Friday 8 a.m. to 8 p.m. US Eastern
Standard Time – 9 a.m. to 5 p.m. throughout Europe. Limited call back service
Saturdays and Sundays.
You can contact 3M Touch Systems Technical Support (US only -- Eastern Standard
Time) by calling the hot line, sending email or sending a fax.
• Technical Support Hot Line: 978-659-9200
• Technical Support Fax: 978-659-9400
• Toll Free: 1-866-407-6666
• Email: US-TS-techsupport@mmm.com
3M Touch Systems Proprietary Information
Overview 7
3M Touch Systems Worldwide Offices
All offices can be reached through the website: http://www.3Mtouch.com/.
• United States 978-659-9000
• United Kingdom +44 (0) 1235-444400
• Australia +61 3 9582 4799
• Canada 604-521-3962
• France +33 (1) 30 31 68 32
• Germany +49 (0) 2131 14-4003
• Hong Kong/China (852) 2333-6138
• Italy +39 0 39-230 2230
• Japan +81 (44) 811-1133
• Korea +822 552 3198
• Singapore +65-6450 8851
• Spain +34 934 15 6285
• Taiwan +886-2-2704 9011
3M Touch Systems Proprietary Information
CHAPTER 1
Integrating the SC500 USB Controller
The MicroTouch™ SC500 Universal Serial Bus (USB) controller is an accurate, small
outline, low cost, temperature stable controller capable of supporting a wide range of
3M Touch Systems resistive touch screens. It is designed to work with Microsoft®
Windows® XP, 2000, 98SE and Windows Me for internal mounting in OEM
applications.
This chapter covers the following SC500 USB controller specifications:
• Cable connections
• Mounting requirements
• Power requirements and options
• Status LED codes
Overview of the SC500 Touch Screen Controller
The SC500 controller is an uncased device using a USB interface.
To integrate and test the SC500 USB controller, you need the following items:
• A 3M Touch Systems 5-wire resistive touch screen. The touch screens are available in a
variety of sizes.
• A method of establishing the USB communication between the controller and your
system. The standard 3M Touch Systems USB communications cable (P/N7319420) is
recommended. This cable is PC99 compliant.
• A touch screen utility or driver with a calibration routine.
Note: You can use MicroTouch™ Software, which includes the touch screen device
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 SC500 has a 5-pin touch screen
connector (JP5), and a 5-pin USB cable connector (JP7).
3M Touch Systems Proprietary Information
10 SC500 USB Controller Reference Guide
Figure 1. SC500 USB Controller Overall Dimensions
Handling and ESD Protection
When mounting the sensor and controller, use normal precautions for handling
electrostatic sensitive devices. The SC500 has internal protection to ±20 kV for ESD
air discharges to the touch screen (not to the controller directly) that may occur during
normal operation of the touch screen. Refer to Appendix A for further specifications.
Establishing the Data Connection
The SC500 USB Resistive Controller requires a 3M Touch Systems 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 SC500 USB
Resistive Controller. The other end, which has a Type-A 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 Touch Systems USB cable.
Table 1. USB Cable for SC500 USB Resistive 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
3M Touch Systems Proprietary Information
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