Daktronics AF-3150-20-R,A - Manual (Page 13)

RS422: RS422 is a standard differential
communication type with a maximum cable
length of 4000 feet (1.2 kilometers).
Figure 4: Signal Converter (RS232 to
RS422 Shown)
Serial Port: An actual serial port is required for
direct connections through the j-box, signal
converters or the radio j-box from the computer.
Certain USB adapters create an “actual” serial
port.
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.
1.6 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.
Figure 6: Module Numbering
In addition, the following labeling formats might be
found on various Daktronics drawings:
• “TB_ _” signifies a termination block for
power or signal cable.
• “F_ _” represents a fuse.
• “E_ _” shows a grounding point.
• “J_ _” denotes a power or signal jack.
• “P_ _” stands for a power or signal plug for
the opposite jack.
Finally, Daktronics part numbers are commonly found on drawings. Those part
numbers can be used when requesting replacement parts from Daktronics Customer
Service. Take note of the following part number formats:
Introduction
1-7