Daktronics AF-3065-34-RGB - Manual (Page 21)

4. 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 disconnect is located out of sight of the display, it must be
capable of being locked in the open position.
5. Power conductors from the disconnect to the display should be routed through conduit in
agreement with local code.
6. You may route the signal cable from the control computer to the display at this time also. Be sure
to run the power and signal cables in a separate conduit.
3.6 Power
Reference Drawings:
Power Specs, 8x144 Display RGB ...................................................... Drawing A-148571
Entrance Box 8/16............................................................................... Drawing A-149160
Assy, Power Box 2/4 ........................................................................... Drawing A-155736
Power Connection, AF-306X ............................................................... Drawing A-154965
Schematic ...................................................................................................... Appendix B
Power Requirements
Refer to Drawing A-148571 for voltage and current requirements for your display size. Each uses
a 120VAC or 120/240 VAC single-phase power source. Depending on the module color and
display size the power supply may vary.
Do not connect the displays to any voltage other than that listed on the Daktronics product label.
Proper power installation is imperative for proper display operation. The following sub-sections
give details of display power installation.
Grounding
Displays MUST be grounded according to the provisions outlined in Article 250 of the
National Electrical Code ® . Daktronics recommends a resistance to ground of 10 ohms or less.
The display system must be connected to earth-ground. Proper grounding is necessary for reliable
equipment operation. It also protects the equipment from damaging electrical disturbances and
lightning. The display must be properly grounded or the warranty will be void.
The material of an earth-ground electrode differs from region to region and from conditions
present at the site. Consult the National Electrical Code and any local electrical codes that may
apply. The support structure of the display cannot be used as an earth-ground electrode. The
support is generally embedded in concrete, and if in earth, the steel is either primed or it corrodes,
making it a poor ground.
Power Installation
There are two considerations for power installation; installation with ground and neutral
conductors provided and installation with only a neutral conductor provided. These two power
installations differ slightly, as described in the following paragraphs:
Installation with Ground and Neutral Conductors Provided
Electrical Installation 3-5
For this type of installation, the power cable must contain an isolated earth-ground conductor.
Under this circumstance, do not connect neutral to ground at the disconnect or at the display.
This would violate electrical codes and void the warranty. Use a disconnect so that all hot