Appendix A Touchscreen Driver Installation; Introduction; Touchscreen Specifications - Advantech FPM-3155 Series User Manual

Appendix A Touchscreen Driver Installation

A.1 Introduction
The FPM-3155 Series' optional touchscreen uses an advanced 8-wire
resistive technology. It provides more accurate sensing capacity than
other technologies. The touchscreen is specially designed for tough
industrial environments, and has been approved to FCC Class A and
Class B standards.
A.2 Touchscreen specifications
Electrical
• Contact bounce: < 10 ms
• Operating voltage: 5 V (typical)
• Contact current: 20 mA (max.)
• Circuit resistance: Open: > 30 mohms
• Sheet resistance variation: Within one screen: ± 5%
Durability
Test conditions: 4H hardness, 0.04" stylus pen, 350 gram load
• Point activation:
Single point, position of stylus controlled to ± 0.0005"
Result: > 1 million activations
• Linear activation:
2" diagonal line, position of stylus controlled to ± 0.0005"
Result: > 250,000 cycles
• Chemical resistance: Hard coating is highly resistant to most
solvents and chemicals
Optical
• Visible light transmission: 72% (typical)
• Reflection: > 25% @ 550 nm
FPM-3155 Users Manual
Closed: < 2000 mohms
From screen to screen: ± 20%
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