Daktronics AF-3400-133,171,216,260 - Manual (Page 21)

Electrical Installation
3-3
3.2 Signal Termination Enclosures
In each communication method the final connection has a weather resistant enclosure
to the display. For signal termination to the enclosure, see the manual included in
the box with the enclosure
Note the following information when mounting the enclosure:
1. Be sure to mount the enclosure with the cables exiting from the bottom, to
prevent water from entering into the enclosure
2. Mount the enclosure securely and, if possible, at a height or location
inaccessible to vandalism
Note: Daktronics engineers strongly recommend that the quick connect cable be
secured to protect it from weather or vandalism.
3. Earth ground enclosures that use wire signal cable – the resistance to
ground should be 10 ohms or less (a grounding electrode conductor is
attached to the enclosure to make the necessary earth ground connection)
Do not attach to the structure because the structure does not provide a good
ground.
3.3 Conduit
Daktronics does not include the conduit. Separate conduit must be used to route:
• Power
• Signal IN wires to the signal termination enclosure, when applicable
• Signal OUT wires (if not using the provided interconnect cable)
Knockout holes for ½" conduit are located at the bottom right (rear view) of the back
of the display.
3.4 Preparing for Power/Signal Connection
1. Punch or use ½" (0.875) conduit holes for the desired conduit openings. Be
careful that none of the internal components are damaged.
2. Attach the conduit.
3. Open the module door as Section 2.2 describes. Usually the controller is
behind module door A101 and the power termination panel is behind
module door A102.
4. Locate the controller and power termination box for this display in the
appropriate Shop Drawings located in Appendix A. The controller
receives the incoming signal and relays it to the individual modules.
5. Route power to the display through a fused disconnect switch capable of
opening all ungrounded power conductors. Install this disconnect within the
line of sight of any personnel performing maintenance on the display. If the