Daktronics AF-3700-20 RGB - Manual (Page 19)

Power Installation 9
Section 3: Power Installation
Read the Mechanical, Power, and Signal Installation sections before installing the
display(s).
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 rendered null and void.
3.1 Conduit
Daktronics does not include the 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).
Most displays are provided with unthreaded knockouts on the back for use with ½” conduit.
The 16 pixel high displays have a J-box on the back for power termination.
3.2 Overview of Power/ Signal Connection
Following is a brief summary of the power and signal connections to the display.
1. Power to the display will be terminated internally in most cases. Section 3.5 shows
the internal wiring diagrams.
2. Possible methods for signal termination are shown in the manual for the specific
communication type.
3. Power is routed 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.)
Note: Displays are equipped with overcurrent protection devices that carry a UL489 or
UL1077 (IEC 60947, VDE 660) rating. These devices are only intended to protect the
components within the display. Suitable devices must be used for the equipment and feeders
supplying power to the display.
4. Power conductors from the disconnect to the display should be routed through
conduit in agreement with local code.
5. Display power will terminate internally at the power termination panel.
6. Connect the grounding electrode conductor at the grounding lug on the back of the
display. With sectional displays, connect one grounding lug to earth ground and run
the bonding jumper between display sections.