Daktronics Galaxy AF-3500 Series Double Face - Manual (Page 9)

Power Installation 5
Section 3: Power Installation
Only a qualified individual should terminate power and signal cable at this Daktronics display.
All proposed changes must be approved by Daktronics’ engineering staff or the warranty will be null and void.
3.1 Conduit
Daktronics does not provide 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).
For power, displays have either a J-box or a 3 /
4
" conduit access hole located near the lower right on the back
of the display. For signal, displays have signal input quick connects or etched drilling guides for conduit.
3.2 Overview of Power/Signal Connection
1. Power to the display is terminated externally in most cases. Section 3.6 shows external wiring examples.
2. Possible methods for signal termination are shown in the various communication manuals.
3. Power is routed to the display through a fused disconnect switch capable of opening all ungrounded
power conductors. Install the disconnect within the line of sight of any personnel performing
maintenance on the display, unless it can be locked in the open position.
Note: Displays are equipped with circuit breakers that carry a UL489 or UL1077 (IEC 60947, VDE 660) rating.
These devices are intended only to protect the components within the display.
4. Route power conductors from the disconnect to the display through conduit following local code
specifications.
5. Display power terminates either to the J-box or internally at the power termination panel.
6. Connect the grounding conductor to the grounding lug on the back of the display.
7. Route signal cable to the signal termination enclosure. Ground the enclosure to an isolated earth-ground
connector (when required).
8. Route signal into the enclosure through conduit. The knockouts on the enclosure require the use of 3 /
4
"
conduit.
9. Route signal quick-connect cables from the enclosure to the display either through conduit or through the
display pole if power is not also routed in the display pole.
Note: Daktronics strongly recommends that the quick-connect cables be secured to protect them from
weather or vandalism.