Daktronics Galaxy AF-3155, Manual, Page: 13 / 87

Pixel: Cluster of LEDs. The number and color of the LEDs depends on display
application.
Power Supply: Converts AC line voltage from the load center to low DC voltage for
one or more module driver boards.
Figure 4: Signal Converter (RS232 to
RS422 Shown)
RS232: RS232 is a standard PC
communication type with a maximum
cable length of 25 feet (7.62 meters).
RS422: RS422 is a standard differential
communication type with a maximum
cable length of 4,000 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 a straight
through serial cable.
1.5 Daktronics Nomenclature
Figure 5: Module Numbering Example – 48x160 Front
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.
A module is the building block of the Galaxy
®
display. Each module measures 16
pixels high by 16 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
below breaks down the
module numbering method.
Introduction
1-7