Qlarity-Based Terminal Hardware 31
CHAPTER 3
QTERM-G55 TERMINAL
3.1 Product Description
The QTERM-G55 is a rugged, handheld or panel-mount Ethernet-enabled graphic terminal
with object-based programming. It features a robust list of industrial grade hardware features
and options.
The QTERM-G55 features a QVGA, 320x240 pixel, LCD transflective FSTN, grayscale (16
shades) display or optional active-matrix TFT (256 colors) display. Both displays use a light
emitting diode (LED) backlight. The LED provides reasonable contrast at low power con-
sumption and easy readability. The FSTN contrast is software-controlled and compensated for
temperature. The transflective display provides excellent contrast in sunlight and high ambient
light environments.
The QTERM-G55 comes equipped with one serial port using an EIA-232, EIA-422, or
EIA-485 interface. A second serial port or an Ethernet or Power-over-Ethernet port are avail-
able as options. Units with the emergency stop (E-stop) option may be equipped with a single
serial port, Ethernet or Power-over-Ethernet.
User input occurs through a rugged 24-key or 40-key membrane keypad with steel snap
domes. The top row of keys are commonly used as soft keys to navigate through a set of
changing menus at the bottom of the display. The standard keypad comes with four or five
LEDs under the soft keys that can be used as status or alarm indicators. Power and shift but-
tons with LEDs are included on both keypad configurations. The power button puts the termi-
nal into a sleep mode for low power consumption and provides instant-on function with no
loss of program state.
The 40-key keypad allows for function / softkeys, eight-way directional control and numeric
entry in the unshifted mode and alphanumeric data entry in the shifted mode. Keys can per-
form alternate functions when the shift key is enabled. Both the power and shift functions can
be enabled or disabled in software.
The keypad legend can be customized with your logo/name and custom keys.
The QTERM-G55 terminal stores the firmware and the user application in a compressed for-
mat in flash memory and then transfers them to RAM memory when the terminal is powered
on. The terminal is equipped with two megabytes of flash memory and sixteen megabytes of
RAM memory.
The QTERM-G55 terminal includes a switching power supply with a wide input voltage range
of 8 to 32 VDC. Typically, power is supplied through the 12-pin circular connector or integral
cable (handheld) or the primary serial port (panel-mount). If the Power-over-Ethernet (PoE)
option is selected, power is supplied through the Ethernet cable and your PoE-compliant hub.
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