Daktronics AF-3020-7.6-R,A - Manual (Page 10)

RS/422 Network
RS/422 (EIA/TIA-422-B) is a standard communication interface that utilizes a differential
balanced transmission scheme that uses a typical maximum cable length of 1.2 km (approximately
4000 feet). The main advantage to RS/422 over RS/232 is the longer cable length that is possible.
A signal converter is needed to convert the computer’s RS/232 to RS/422. Refer to Section 3 for
additional information.
Modem Network
The modem is a standard communication interface that utilizes standard phone transmission lines.
The phone company assigns each phone line a number that the modem uses to communicate
between the controller and the display. The display must have a dedicated phone line. Refer to
Section 3 for additional information.
Fiber Optic Network
A fiber optic network is a standard communication method transmitting light (signal) through a
glass fiber. Fiber optic cable has a maximum length of 2,000 feet. A signal converter is required
to convert the computer’s RS/232 interface to a light signal.
1.5 Display Overview
Refer to project specific shop drawings for details of the display.
The Daktronics outdoor LED displays have been designed and manufactured for performance,
reliability, easy maintenance and long life. The displays consist of an array of LED pixels. The
configuration of LED pixels is dependent on the family of LED displays.
A typical system consists of a Windows
â
based personal computer (PC) running Venus 1500 software
and one or more displays. The displays are offered as single-face displays, which are single-sided
stand-alone units. The AF-3020 can be a double-sided display with two singles back to back each
using a separate controller.
The Venus 1500 is a software package that runs under Windows
â
95, Windows
â
98 or Windows NT
â
operating systems on an IBM
â
-compatible computer. Refer to the Venus 1500 controller manual for
installation and maintenance of the Venus 1500 editing station.
The Galaxy Series AF-3020 displays are matrix-based outdoor LED displays that are available in
monochrome red or amber characters. They are offered as 16, 32, or 48 pixel high displays with a
standard 7 high 7.62mm minimum character in different lengths. The Galaxy model numbers are
described as follows: AF-3020-RRxCCC-7.62-SF-Z
AF-3020 = Outdoor Galaxy Display
RR = 16, 32 or 48 Rows High
CCC = Number of Columns Long (96, 144, 192 and 240 are
available)
7.62 = 7.62mm Character Height
SF = Single Face (SF)
Z = Monochrome Red (R) or Monochrome Amber (A)
Introduction 1-4