QTERM-G55 Terminal Installing to NEMA-4 Specifications
Qlarity-Based Terminal Hardware 45
3.3.4 Real-Time Clock
The QTERM-G55 terminal can be optionally equipped with 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.
3.3.5 System Memory
The QTERM-G55 terminal stores the firmware and user applications in a compressed format
in flash memory and then transfers them to RAM memory when the terminal is powered on.
Two megabytes of flash memory and sixteen megabytes of RAM memory are standard.
For information on using resources efficiently to conserve memory when creating a user appli-
cation, refer to “Edit Resources” section in the Qlarity Foundry User Guide.
For information on downloading new firmware, downloading a user application, and determin-
ing the size of a user application, refer to the Qlarity Foundry User Guide.
3.4 Installing to NEMA-4 Specifications
A QTERM-G55 terminal uses a rugged ABS poly carbonate with rubber overmold case
designed to mount into a panel. When properly installed in a NEMA-4 rated panel, the
QTERM-G55 meets all NEMA-4 specifications including hose-down, icing, and salt spray.
A QTERM-G55 terminal can be installed in either a landscape or portrait orientation. When
installing a terminal, you generally take the following steps.
• Decide whether you want to mount and use the terminal in a portrait or landscape orienta-
tion. “Portrait” means that the longest dimension is vertical; “landscape” means that the
longest dimension is horizontal.
• Cut a hole in the panel. See section 3.4.1, “Cutout for Panel Mount Configuration” for spec-
ifications.
• Install the QTERM-G55 terminal in the panel. See section 3.4.2, “Installing the Panel
Mount Terminal” for instructions.
• Connect cables to the terminal. Verify that the thumb screws are tight or the locks snapped
into place for each cable used.
• Apply DC power to the QTERM-G55 terminal. See section 3.4.3, “Applying Power” for
information.
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 (CR1220) or equivalent type as recom-
mended by the manufacturer. Dispose of used batteries according to the manufacturer’s
instructions.
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