Advantech FPM-8192V/8232V 1.2 Touchscreen Solution (Optional)

FPM-8192V/8232V User Manual 4

1.2 Touchscreen Solution (Optional)

Introduction to Five-Wire Resistive Touchscreen

The five-wire resistive touchscreens use a glass panel with a uniform resistive coat-

ing. A thick polyester coversheet is tightly suspended over the top of the glass, sepa-

rated by small, transparent insulating dots. The coversheet has a hard, durable

coating on the outer side and a conductive coating on the inner side.

When the screen is touched, the conductive coating makes electrical contact with the

coating on the glass. The voltages produced are the analog representation of the

position touched. The controller digitizes these voltages and transmits them to the

computer for processing. The five-wire technology utilizes the bottom substrate for

both X and Y-axis measurements. The flexible coversheet acts only as a voltage-

measuring probe. This means the touchscreen will continue working properly even

with non-uniformity in the cover sheet's conductive coating. The result is an accurate,

durable and reliable touchscreen that offers drift free operation. The touchscreens

are sealed against contamination and moisture. The coversheet is sealed to the

glass substrate with an industrial grade caulk. This prevents wicking of fluid between

the coversheet and glass. Also, the touchscreens are not air vented, thereby prevent-

ing fluid ingress through an air vent.

Brief Specifications

Subject Details

Input Method Finger, gloved hand, or stylus activation

Positional Accuracy Standard deviation error is less than 0.080 (2 mm)

Resolution Touchpoint density is based on controller resolution of 4096 x

4096

Touch Activation Force Typically less than 4 ounces (113 grams)

Light Transmission HL products: 80% +/–5% at 550 nm wavelength

Enhanced products: 60% +/–5% at 550 nm wavelength