Daktronics Galaxy AF-3190 Series, Display Manual

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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 display structure.
This cable has a maximum length of 25 feet (approximately 7.6 meters).
RS422
This cable is a 4-conductor shielded cable used to transmit an RS422 signal
(Daktronics part number W-1234, Manhattan number M4473.) This shielded cable
consists of unpaired 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
•
Inside buildings-if cable is not in conduit, keep away from interface signals
With interface 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 (approximately 1.22 km).
Modem
The modem option will use standard telephone cable routed through conduit. The
phone cable and power cannot be routed 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 for the RING wire for
signal hook up to the display.
Note: The telephone line must be a dedicated line and not run through a switchboard
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 should not be subjected to mechanical
flexing. The maximum length of a fiber optic cable is 2,000 feet (approximately 600
meters) from the signal converter to the fiber optic board in the display.