Daktronics Galaxy Series, Manual

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Figure 4: Signal Converter (RS232 to
RS422)
RS422: RS422 is a standard differential
communication type with a maximum cable
length of 4000 feet (1.2 kilometers).
Signal Converter: The signal converter, shown
in
Figure 4
on the right, is a Daktronics supplied
unit that converts the data from RS232 to RS422,
or RS232 to fiber optic signal. The signal
converter is connected to the control PC via
straight through serial cable.
1.5 Daktronics Nomenclature
To fully understand some Daktronics drawings, such as schematics, it is necessary to
know how various components are labeled in those drawings. This information is
also useful when trying to communicate maintenance or troubleshooting efforts.
Figure 5: Module Numbering Example – 24x80 Front
A module is the building block of the
Galaxy display. Each module measures 8
pixels high by 8 pixels wide. By placing
modules side-by-side and on top of one
another a display of any size can be
designed and built. Individual modules can
be easily removed from the display if
required.
Figure 5
above illustrates how
Daktronics numbers modules on a Galaxy
display.
Figure 6
on the right breaks down
the module numbering method.
Figure 6: Module Numbering
In addition, the following labeling formats might be found on various Daktronics
drawings:
•
“TB_ _” represents a termination block for power or signal cable.
•
“F_ _” denotes a fuse.
•
“E_ _” stands for a grounding point.
•
“J_ _” indicates a power or signal jack.
•
“P_ _” signifies a power or signal plug for the opposite jack.
Introduction
1-7