Daktronics Galaxy Series, Руководство пользователя

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Electrical Installation
3-3
3.2 Control Cable Requirements
RS232
This cable is a 2-conductor shielded cable used to transmit an RS232 signal
(Daktronics part number W-1117). This shielded cable should not be subjected to
mechanical flexing after installation. This cable is not for direct burial and should be
routed in a dedicated, grounded metallic conduit at the base of the sign structure.
This cable has a maximum length of 25 feet (7.6 meters).
RS422
This cable is a 4-conductor shielded cable used to transmit an RS422 signal
(Daktronics part number W-1234). This shielded cable consists of paired wires. They
should not be subjected to mechanical flexing after installation. This cable is not for
direct burial and should have one of the following routings:
•
In dedicated metallic conduit. Power and signal cable cannot be run in
the same conduit.
•
Inside buildings
−
if cable is not in conduit, keep away from interference
signals.
With interference signals (such as power conductors, intercom, etc.) typically a two-
foot separation is required. The maximum length of an RS422 signal cable is 4,000
feet (1.22 km).
Modem
The modem option will use standard telephone cable routed in conduit. Do not run
power and phone cable in the same conduit. The local telephone company will
need to assist in this installation. Ask the telephone company which color is used for
the TIP wire, and which color for the RING wire for signal hook up.
Note: The telephone lines must be dedicated lines and not run through a switch
board/communications system.
Fiber Optic
This cable is a 4-fiber cable (Daktronics part number W-1376). Two fibers are used
for display communications and the other two are saved for spares. The cable may be
either direct burial or routed in conduit but it should not be subjected to mechanical
flexing. The maximum length of a fiber optic cable is 2,000 feet (611.6 meters).
Radio
The Server radio, connected to the computer through a J-box, requires an 18-gauge
six-conductor cable (Daktronics part number W-1370). Four conductors will be used
for the signal and two for power. This wire needs to be in conduit when exposed to
outdoor conditions out to the server radio. The maximum distance from the J-box to
the server radio is 1000 feet (305.8 meters).
The Client radio at the display comes with cable that is rated for outdoor use and
does not need to be in conduit.
Note: Secure excess cable to the structure to prevent
it from being pulled loose by weather or vandalism.