Qlarity-Based Terminal Hardware 83
CHAPTER 7
QTERM-G72 TERMINAL
7.1 Product Description
The QTERM-G72 human machine interface terminal is a large display Ethernet-enabled
graphic terminal with object-based programming. It features a robust list of industrial grade
hardware features and options.
The QTERM-G72 features a vivid WVGA (800 x 480), 177 mm (7"), color graphics
TFT-LCD display with 16 bit (65536) color (displayable colors are limited to 256 by Qlarity).
The display includes an LED backlight with software controllable dimming. With the included
Ethernet 10/100Base-T interface and two serial ports, this terminal is ready to connect to
nearly any device.
The analog-resistive touch screen covers the full viewable area of the display. The touch screen
is the primary mechanism for user input.
For communications, the QTERM-G72 comes equipped with two serial ports. The primary
serial port is software-configurable to EIA-232 (with RTS/CTS flow control), EIA-422, or
EIA-485 interfaces. The secondary serial port uses an EIA-232 interface with hardware
(RTS/CTS) or software flow control. The terminal also includes one 10/100Base-T Ethernet
(RJ45 connector) and one USB 2.0 full speed port (mass storage devices only). The I/O con-
nectors are accessible at the terminal back panel and are angled towards the bottom of the ter-
minal to facilitate mounting in shallow panel areas.
Other key standard features include a speaker, which has programmable pitch and duration,
and an audio decoder for playing audio wave files. The terminal also includes a battery-backed
real-time clock and a hardware watchdog timer.
The terminal stores the firmware and the user application in a compressed format in flash
memory and then transfers them to RAM memory when the terminal is powered on. The ter-
minal is equipped with four megabytes of flash memory and 32 megabytes of RAM memory.
The QTERM-G72 electronics are packaged in a rugged and attractive black thermoplastic
NEMA-4X housing that accommodates the same panel cutout as our QTERM-G70 terminal.
The QTERM-G72 terminal requires a DC power source in a range of 10 to 32 VDC. This
power can be supplied either via the main DB9 serial connector or the 3-pin power terminal
strip (which includes power input, return, and chassis ground).
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