4.
An enclosure receives the signal from the
control computer and transfers it to the
display controller. The controller receives the
incoming signal and relays it to the individual
modules.
Figure 18: Primary Display with Enclosures
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 disconnect is located out of
sight of the display, it must be capable of
being locked in the open position.
6.
Power conductors from the disconnect to the
display should be routed through conduit in
agreement with local code.
7.
You may also route the signal cable from the
display enclosure to the display at this time.
8. Note:
Always use water resistant boxes for
signal/power termination enclosures to
prevent corrosion or other physical damage to
interior parts.
3.6 Power
Reference Drawings:
Shop Drawing, AF-3112-2480-34-SF-*-P/M................
Drawing A-193720
Power Specs, 8x144 – 32x144, AF-3112, Amber .......
Drawing A-200044
Power Specs, 8x144 – 32x144, AF-3112, Red ...........
Drawing A-200045
Shop Drawing, AF-3112-1680-34-SF-*-P/M................
Drawing A-201993
Schem, AF-3112-8-32***-34mm-Mon-PM...................
Drawing C-200002
Power Requirements
Refer to
Drawing A-200044
or
A-200045
for voltage and current requirements for
your display size. Each uses a 120VAC 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. It is recommended that an eight
gauge copper wire be connected to the ground rod.
The display must be properly
grounded or the warranty will be void
.
Electrical Installation
3-6
