Daktronics G-100-7.6-R - Manual (Page 6)

Introduction 1-2
All of the programming features would seem insignificant if the installation of the systems could not be
accomplished with basic tools and without technical difficulty. Daktronics decided to use the very popular
and readily available RJ11 connector. This connector is also used on modern home and office telephone
equipment.
All that is required for signal installation is standard six (6) conductor modular telephone wire and a tool to
install the connector. Tools required for mounting the display depend on the location and size of the
display. For some installations, it may be possible to buy pre-terminated telephone cables for use with the
displays.
There are four (4) network systems available: RS/232, RS/422, modem and TCP/IP.
RS/232 Network
Reference Drawings:
System Riser Diagram; RS/232 Drawing A-92268
RS/232 (EIA/TIA-232-E) is a standard communication interface that employs a single-ended serial
transmission scheme that uses a maximum cable length of 10 meters (30 feet). This interface was
designed for computer communication at short distances. All computers have an RS/232
communications port.
RS/422 Network
Reference Drawings:
System Riser Diagram; RS/422 Drawing A-92267
RS/422 (EIA/TIA-422-B) is a standard communication interface that utilizes a differential balanced
transmission scheme which 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.
Modem Network
Reference Drawings:
System Riser Diagram; Modem Drawing A-92570
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 controller and display.
TCP/IP Network
Reference Drawing:
System Riser Diagram; TCP/IP Drawing A-95515
The TCP/IP protocol is an interface allowing the Ethernet network card (installed in the operator’s
computer) to communicate with the serial server via a Local Area Network (LAN). Information
for the individual displays is distributed from the serial server’s RS/232 and output.