Supported Interfaces QTERM-G55 Terminal
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Qlarity-Based Terminal Hardware
3.2.3.1 Power Requirements
The optimal power supplied to the QTERM-G55 through the PoE port is 48 The analog-resis-
tive 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 product 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 panels 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 which accommodates the same panel cutout as our QTERM-G70 termi-
nal. Optional pad printing of the front bezel with logo/name or graphics is available as an
option.
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).
DC, although the unit will operate with a power input as low as 36 VDC, or as high as 57 VDC
(see IEEE 802.3af specification). The power required to operate the terminal with out any
additional options is listed below.
3.2.3.2 Pinouts (Panel-mount)
In accordance with the PoE standard (IEEE 802.3af), the PoE port is insensitive to polarity of
the power supply and can receive power in either mode A (superimposed on the transmit and
receive twisted pair conductors) or mode B (using the additional twisted pair conductors). This
Current Consumption
Terminal 48VDC
G55 STN Idle 70 mA
Active Add +10 mA
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