Daktronics AF-3180-64-R,A - Manual (Page 25)

Electrical Installation 3-5
3.5 Preparing for Power/Signal Connection
Reference Drawings:
Shop Drawings........................................................................ Appendix A
If the display needs openings for the power and signal, punch out the knockouts in
the lower right corner from the rear. Refer to the Shop Drawings for appropriate
locations.
1. With a #2 screwdriver, release the four screws that hold the module in
place. The module will pull forward and out from the display.
2. Disconnect the power and signal cables from the back of the module.
3. Route power to the display through a fused disconnect switch capable of
opening all ungrounded power conductors. Locate 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.
4. Power conductors from the disconnect to the display must route through
conduit in agreement with local codes.
5. You may also route the signal cable from the control computer to the
display at this time. Run the power and signal cables in a separate
conduit.
3.6 Power
Reference Drawings:
Panel Board Layout, AF-3180- 64mm ......................... Drawing A-192369
Power Specs, AF-3180, Amber LEDs ......................... Drawing A-192935
Power Specs AF-3180, Red LEDs............................... Drawing A-192937
Refer to Drawings A-192935 and A-192937 for voltage and current requirements for
your display size. The display will use either a 120/240VAC single-phase power or
120/208 three-phase power source.
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. Electrical installations must
be performed by qualified personnel. Unqualified personnel should not attempt to
install the electrical equipment. Serious danger to equipment and personnel could
occur if equipment is improperly installed.
Grounding
Displays must be grounded according to the provisions outlined in Article 250 of the
National Electrical Code
® . Daktronics requires a resistance to ground of 10 ohms or
less. Verification of ground resistance can be performed by the electrical contractor
who is performing the electrical installation. Daktronics Sales and Service personnel
can also perform this service
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.