QTERM-G58 Terminal Terminal Components
Qlarity-Based Terminal Hardware 69
5.3.3 Keypad
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 enables and
disables the internal power supply for true shutdown.
The standard 40-key keypad legend allows for function/soft keys, eight-way directional con-
trol and numeric entry in the unshifted mode and alphanumeric data entry in the shifted mode.
Keys can perform alternate functions when the shift key is enabled. The power and shift func-
tions can be enabled or disabled in software.
The keypad legend can be customized with your logo/name and custom keys.
5.3.4 Speaker
A speaker is built into the QTERM-G58 terminal and faces to the back of the unit. Audio can
be linked to events or actions (e.g., key press, timer, etc.). Pitch and duration of a note are con-
trolled by API functions called from the user application. Refer to the “Controlling the
Speaker” section in the Qlarity-based Terminal Programmer’s Reference Manual. Volume
control is also accessible via software.
The terminal may optionally include an audio decoder that allows it to play PCM audio (.wav)
files. The audio decoder supports wave files meeting the following criteria:
• Sample rate of 8 kHz, 11.025 kHz, 16 kHz or 22.050 kHz
• Resolution of 8 or 16 bits per sample.
5.3.5 Real-Time Clock
The QTERM-G58 terminal includes a battery-backed real-time clock. The real-time clock can
be used to time/date stamp messages or for timed polling and program execution.
WARNING
There may be danger of leakage if the battery is incorrectly replaced, creating a potential
health hazard. Replace the battery only with the same (CR2032) or equivalent type as recom-
mended by the manufacturer. Dispose of used batteries according to the manufacturer’s
instructions.
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