AAEON AGD-317D - Manual (Page 42)

L C D D i s p l a y A G D - 3 1 7 D
4.1 Introduction
The optional AGD-317D Series touch screen uses 5-wire resistive
technology to provide more accurate sensing capacity than other
technologies. The touch screen is specially designed for tough
industrial environments, and has been approved by FCC Class A
standards.
Note: For A1 version, if you connect the RS-232 and USB touch
screen interfaces to the system simultaneously, the USB mode will
be the priority. For A2 version, the connection will be switched by
software.
Resistive Type
Supply Voltage and Current
• +5 Vdc, nominal (+4.90 Vdc to +5.10Vdc) Self powered
only.
• 50 mA standby, typical at +5 Vdc; during touch 70 mA
average, 100 mA max
• Average power dissipation is 0.5 W, typical.
• Supply must be capable of sourcing 100mA, max
• Total noise and ripple requirement must be less than 100
mV (p-p) for frequencies below 1 MHz, and less than
50 mV (p-p) for frequencies above 1 MHz.
Chapter 4 Touch Screen Driver Installation 4-2