Daktronics DF-1050/1051/1052/1053 - Manual (Page 20)

3-2 Electrical Installation
The table below shows the circuit specifications and maximum power requirements
for each model in this series. Models are listed in order by digit size, and display
type.
Grounding
Reference Drawings:
Enclosed Driver, 4 Col MASC, Wide ........................... Drawing A-191943
Displays MUST be grounded according to the provisions outlined in Article 250 of
the National Electrical Code and according to the specifications in this manual.
Daktronics requires a resistance-to-ground of 10 ohms or less.
The contractor performing the electrical installation can verify ground resistance.
Technicians from Daktronics Sales and Service offices can also provide this service.
The display system must be connected to an earth electrode installed at the display.
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. Refer to Drawing A-191943, for
information on where to connect the grounding wire. Connection at the driver
enclosure terminal block is illustrated at the bottom of the drawing.
The material for an earth-ground electrode differs from region to region and may
vary according to 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 it is in earth, the steel is usually primed or it corrodes, making it a
poor ground in either case.
Model Digit
Height/Color
Maximum
Wattage
Power Amps
per Line
DF-1050
5" (127 mm)
Red or amber
30 W 120 V
AC
0.3A
DF-1050
7" (178 mm)
Red or amber
150 W 120 V
AC
1.3 A
DF-1050
10" (254 mm)
Red or amber
150 W 120 V
AC
1.3 A
DF-1051
5" (127 mm)
Red or amber
30 W 120 V
AC
0.3 A
DF-1051
7" (178 mm)
Red or amber
150 W 120 V
AC
1.3 A
DF-1051
10" (254 mm)
Red or amber
150 W 120 V
AC
1.3 A
DF-1051
13" (330 mm)
Red or amber
150 W 120 V
AC
1.3 A