Daktronics AB-1600-1.5,2.5 - Manual (Page 22)

Mechanical Installation 2-6
display through RJ45 cables. Be sure not to mount the data distributor enclosure so far away from the
display that the RJ45 cables cannot reach between the two. Daktronics usually cuts RJ45 cables to
length.
Signal and power cable into the data distributor enclosure should both be run through separate, rigid,
metal conduit, as opposed to flexible conduit (metal or PVC). Section 3 addresses power and signal
connection.
2.8 Display Ventilation Requirements
L
Any new plans for filtering air in an enclosed display must be submitted to Daktronics
engineering staff for evaluation and approval or the warranty will be null and void. If the
Daktronics air filtration system is modified in any way, these changes must first be approved by
Daktronics engineering staff.
In enclosed displays, 12 square inches (77.4 square centimeters) of unobstructed opening per module is
required to ensure adequate display cooling. Allowances must be made to compensate for the
percentage of screen in the material covering the openings in the enclosed structure. If air must be
forced into the enclosed area, 110 cubic feet per minute (187 cubic meters per hour) must be provided
per module (one module = 20" x 40" (508 mm x 1016 mm) display active area, or eight rows by 16
columns of lamps).
For example , a 24x80 double -face display with an enclosed center cabinet would require 360 square
inches (2.3 square meters) of unobstructed opening in the bottom of the center cabinet.
[2(24x80)]/128 = 30 modules 30 modules x 77.4 cm
2
= 2322 cm
2
or 2.3 m
2
2.9 Verifying Correct Lens and Module Position
The final steps of mechanical installation involve verifying that all lens are positioned properly upon
their respective lens/reflector assemblies and that all modules are fully engaged into the cabinet.
Look down the rows of louvers from either end of the display and ensure that all lenses are secured
properly. Lenses not secured properly are easily noticeable as the lens removal tab, or the lens itself,
will not be in alignment with the other lenses or lens removal tabs of that row.
Refer to Figure 21 and the following steps to return a lens to its correct position.
1. First, insert the bottom indexing tabs into the slots. There is one indexing tab on each bottom corner
of the lens.
2. While gently pushing the above louver upward, grab the lens tab and push the top of the lens
behind and under the louver offset. Only push the louver upward enough to allow the lens to snap
into position behind the offset.
3. Release the louver and verify the lens is aligned with others in the row.