All rights reserved. While every precaution has been taken in the preparation of this manual,
the publisher assumes no responsibility for errors or omissions. No part of this book covered
by the copyrights hereon may be reproduced or copied in any form or by any means – graphic,
electronic, or mechanical, including photocopying, taping, or information storage and retrieval
systems – without written permission of the publisher.
®
is a trademark of Daktronics, Inc.
Galaxy
All others are trademarks of their respective companies.
Figure 46: Media Converter......................................................................................................4-12
Figure 47: Displays with No External Temperature Sensor..........................................................4-12
Figure 48: Termination Location for Displays with External Temperature Sensor..........................4-13
Figure 49: Location of CAN Temperature Sensor Termination Jumper.........................................4-13
iv
List of Figures
Section 1: Introduction
This manual explains the installation, maintenance, and troub leshooting of the 89 mm AF3197 RGB Galaxy
®
signs. For questions regarding the safety, installation, operation, or
service of this system, please refer to the telephone numbers listed on the cover page of this
manual.
The manual contains seven sections: Introduction, Mechanical Installation, Electrical
Installation, Maintenance and Troubleshooting, Appendix A, Appendix B and Appendix C.
• Introduction covers the basic information needed to make the most of the rest of
this manual. Take time to read the entire introduction as it defines terms and explains
concepts used throughout the manual.
• Mechanical Installation provides general gu i dance o n di splay mounting.
• Electrical Installation gives general guidance on terminating power and signal
cable at the display.
• Maintenance and Troubleshooting addresses, such topics as removing basic
display components, troubleshooting the display, performing general maintenance,
and exchanging display components.
• Appendix A lists the drawings included within the manual.
• Appendix B includes information about the signal converter.
• Appendix C includes information about the Optional Temperature Sensor.
Daktronics identifies manuals by an ED number located on the cover page of each manual.
For example, Daktronics refers to this manual as ED-14037.
Daktronics, commonly uses a number of drawing types, along with the information that each
provides. This manual might not contain all of these drawings:
• System Riser Diagrams: Overall system layout from control computer to display,
power, and phase requirements.
• Shop Drawings: Fan locations, mounting information, power and signal entrance
points, and access method (front and rear).
• Schematics: Power and signal wiring for various components.
• Display Assembly: Locations of critical internal display components, such as power
supply assemblies, controller boards, thermostats, and light detectors.
Figure 1 illustrates Daktronics drawing label. The lower-right corner of the drawing contains
the drawing number. The manual identifies the drawings by listing the last set of digits and
the letter preceding them. In the example below, the manual refers to the drawing as Drawing B-206146. Reference drawings are inserted in Appendix A.
Introduction
Figure 1: Drawing Label
1-1
This manual shows all references to drawing numbers, appendices, figures, or other manuals
in bold typeface, as shown below:
“Refer to Drawing B-206146 in Appendix A for the power supply wiring.”
Additionally, the manual lists drawings referenced in a particular section at the beginning of
that section as seen in the following example:
Daktronics builds displays for long life and that require little maintenance. However, from
time to time, certain display components need replacing. The Replacement Parts List in
Section 4.13 provides the names and numbers of components that may need to be replaced
during the life of the display. Most display components have a white label that lists the part
number. The component part number is in the following format:
0P-_ _ _ _-_ _ _ _ (circuit board) or 0A-_ _ _ _-_ _ _ _ (multi-component assembly).
Following the Replacement Parts List is the Exchange and Repair and Return Programs
in Section 4.14. Refer to these instructions if any display component needs replacement or
repair.
1.1 Safety Precautions
Important Safeguards:
1. Read an d understand these instructions before installing.
2. Be sure the display and radio enclosures are properly grounded with an earth ground electrode at the display.
3. Disconn ect power when servicing the display.
4. Do not modify the display structure or attach any panels or coverings to the display without the written consent of Daktronics, Inc.
1.2 Network Concepts
The concept of using LED displays as a cost effective, high impact method of
communication is rapidly growing throughout many industries and businesses. The
reasons for this growth are many, but the need for additional features and the
complexity of multiple display installations has emerged. Daktronics display systems
have been designed to meet those needs.
1-2
Introduction
The common thread to most client requests is a means of programming and controlling a
oup of displays from a central control point. Daktronics responded by developing a
gr
powerful system of interconnecting and controlling displays. Great care has been taken to
design products that will satisfy a wide variety of installations. Some of the design goals
of these systems include the following:
• Easy trans
• Th
e ability to tell a display or group of displays in the network which message
should run
• Th
e ability to determine the status of any display on the network
• Th
e ability to control multiple display technologies on the same network
Tools required for mounting the display depend on the location and size of the display.
For
some installations, it may be possible to purchase pre-terminated telephone cables for
use with the displays.
There are six (6) network systems available: RS232, RS422, modem, fiber, radio and
Eth
ernet. Up to 240 displays can exist on one network.
fer of messages
RS232 Network
RS232 (EIA/TIA-232-E) is a standard communication interface that employs a singleended serial transmission scheme that uses a maximum cable length of 7.6 meters
(approximately 25 Feet). This interface was designed for computer communication at
short distances. The computer used will require an RS232 communication port. Refer to
Section 3 for additional information.
RS422 Network
RS422 (EIA/TIA-422-B) is a standard communication interface that utilizes a differential
balanced transmission scheme that uses a typical maximum cable length of 1.2 km
(approximately 4000 feet). The main advantage to RS422 over RS232 is the longer cable
length that is possible. A signal converter is needed to convert the computer’s RS232
signal to RS422. Refer to Section 3 for additional information.
Modem Network
The modem is a standard communication interface that utilizes standard phone
transmission lines. The phone company assigns each phone line a number that the modem
uses to communicate between computer and display. Each modem network needs to
have a dedicated phone line assigned to it. Refer to Section 3 for additional information.
Fiber Optic Network
A fiber optic network is a standard communication method transmitting light (signal)
through a glass fiber. Fiber optic cable has a maximum length of 600 meters
(approximately 2,000 feet). A signal converter is needed to convert the computer’s
RS232 signal to fiber optic signal; a minimum of two fibers is required. Refer to Section 3 for additional information.
Introduction
1-3
Radio Network
The radio network is a standard communication method that uses radio waves at high
frequencies to transmit signal. The Venus
distance of 450 meters (approximately 1500 feet) outdoor and 150 meters
(approximately 500 feet) indoor. A nearly straight line-of-sight path must be
maintained between the Server Radio connected to the computer and the Client
Radio connected to the display. Refer to Section 3 and the Venus 1500 Radio
Manual, ED-13932, for the additional information.
®
1500 Radio network has a maximum
Ethernet Network
Note: The use of a quick connect cable or interconnect wiring between display
controllers will not allow separate control of the second display if the input
signal was Ethernet. Only separately wired primary displays are allowed when
controlled by an Ethernet signal.
1. Th
e Ethernet network that uses fiber optic cable is a standard
communication method transmitting light (signal) through a glass fiber.
When used with the media converter the fiber optic cable has a maximum
length of 2000 meters (approximately 1.2 miles). One media converter is
needed to convert the Ethernet signal from the hub or switch to fiber optic
signal and then a second media converter is located in the display that
converts the fiber signal back to Ethernet. A minimum of two fibers is
required. Refer to Section 3 for additional information.
2. Th
e Ethernet network that uses copper cable is a standard communication
interface that utilizes a local area network (LAN). Utilizing Cat-5/Cat-5E
cable, this transmission scheme has a typical maximum cable length of 100
meters (approximately 330 feet) from an Ethernet hub or switch. The cable
will connect to a network hub and then to the Ethernet surge card in the
display. Refer to Section 3 for more information.
1.3 Sign Overview
Reference Drawings:
Power Specs, AF-3197, RGB LEDs
Component Layout, AF-3190-**x**-89mm
Daktronics designs and manufactures AF-3197 Galaxy
reliability, easy maintenance, and long life. The pixels have an 89mm
center-to-center spacing and LEDs (light emitting diodes). Each display section has a
m
inimum of 24-inch character height. A light sensor on the front of the first display
is used for automatic dimming of the LEDs based on the ambient light levels.
Refer to D
approximate size, weight, and power requirements for your model of display.
1-4
rawing A-183906, Drawing B-181666, and th e Shop Drawings for the
............................ Drawing A-183906
.................. Drawing B-181666
er to Appendix A
®
displays for performance,
Introduction
The following describes the Galaxy
RR
=
Outdoor 89mm Louvered RGB Galaxy Sign
=
Number of Rows High (8, 16, 24, 32, 40 and 48 are available)
AF-3197
®
model numbers: AF-3197-RRCCC-89-RGB
89
=
Number of Columns Long (32, 48, 64, 80, 96, and 112 are
available)
=
89mm center-to-center pixel spacing
=
LED Color (32,000 RGB)
CCC
RGB
A typical sign system consists of a Windows
®
Venus
runs under Windows
1500 software and one or more displays. Venus® 1500 is a software package that
®
98, ME™, NT® 4.0, 2000, or XP Home/Professional operatin g
systems on an IBM-compatible computer. Refer to the Venus 1500 controller manual,
ED13530, for installation and maintenance of the Ve nus 1500 editing station.
The displays are single-face units, which are si
display is called the primary, and if mounted back-to-back with a second display; the
second display is called the echo. If the second display will be mounted at a distance of
more than ten feet from the primary, which is common with the 89mm displays, the quick
connect interconnect cable cannot be used. Signal between controllers will need to be
hardwired.
1.4 Component Identification
The following illustrations and definitions depict some of the more commonly accessed
®
Galaxy
meet customer needs, the actual sign design may vary slightly from the illustrations
below.
This is only a brief overview. Refer to Secti
and troubleshooting various sign components.
Com Port: T
controls the sign through either a 9 or a 25 pin serial connector.
Controller: Th
receives, translates, and activates the signal information from the control computer to the
appropriate pixels on the display accordingly.
sign components. Because Daktronics occasionally alters standard design to
on 4 for detailed information on maintaining
he serial connector on the back of the control computer. The COM port
e display’s controller is the “brains” of the display. The controller
®
based personal computer (PC) running
ngle-sided stand-alone displays. The first
Introduction
1-5
Figure 2: Controller
Driver: Circuit board responsible for switching the intensity levels of the LEDs. The
driver is located inside the driver box and mounts on the back of the module.
Fiber Optic: Technology that uses glass (or plastic) threads (fibers) to transmit data
from the controller to the display. A fiber optic cable consists of a bundle of glass
threads, each of which transmits messages modulated onto light waves.
Galaxy
®
: Daktronics trademarked name for LED monochrome, tri-colored, or RGB
matrix signs.
Latch Access Fastener: Device utilizing a rotating retainer bar to hold the module
firmly to the display frame. There is one latch near the center of the module on the
right side.
LED (light emitting diode): Low energy, high intensity lighting units.
Louver: Black shade positioned horizontally above each pixel row. The louvers
increase the level of contrast on the display face and direct LED light.
Module: 89mm Galaxy
pixel strips, louvers, and a driver. Refer to
®
modules are 8 pixels high by 8 pixels wide. They consist of
Figure 3 for identification of parts.
Network: Consists of multiple signs connected to each other.
Pixel: Cluster of LEDs. The number and color of the LEDs depends on display
application.
1-6
Introduction
Figure 3: 8x8 Pixel Module (Front and Rear)
Pixel Strip: Four LED pixels mount directly onto a pixel strip. Each pixel strip is
removable from the module. There are 16 pixel strips per module.
Power Supply: Converts AC line voltage from the load center to low DC voltage for
one or more module driver boards.
RS232: RS232 is a standard PC communication type with a maximum cable length
of 25 feet (7.62 meters)
RS422: RS422 is a standard differential communication type with a maximum cable
length of 4000 feet (1.2 kilometers).
Serial Port: An actual serial port is required for direct connections through the Jbox, signal converter or the radio J-box/signal converter from the computer. Certain
USB adaptors create an “actual” serial port and others create “virtual” ports.
Daktronics does not support the use of a USB adaptor. The Venus 1500 software will
not recognize a virtual port.
Sign Address: The sign address is an identification number assigned to each display
of a network. It is set by rotating the hex address switches on the controller. The
control software uses the address to locate and communicate with each display.
Displays that are on the same network cannot have the same address.
Introduction
1-7
Signal Converter: The signal converter, shown in
Figure 4, is a Daktronics supplied unit that converts
the data from RS232 to RS422. A similar looking
device is used to convert RS232 to fiber optic signal.
The signal converter is connected to the control PC via
a straight through serial cable.
®
Venus
1500: Daktronics designed, Windows® based
software used to create and edit messages on the
display. Refer to ED-13530 for more information.
1.5 Daktronics Nomenclature
Figure 4: Signal Converter
Figure 5: Module Numbering Example – 24x80 Front
To fully understand some Daktronics drawings, such as schematics, it is necessary to
know how those drawings label various components. This information is also useful
when trying to communicate maintenance or troubleshooting efforts.
A module is the building block of the sign.
Each module measures 8 pixels high by 8
pixels wide. By placing modules side-by-side
and on top of one another, Daktronics can
design and build signs of any size. A person
can easily remove individual modules from the
sign if required.
Daktronics numbers modules on a Galaxy
sign.
Figure 6 breaks down the module
numbering method.
Figure 5 illustrates how
®
Figure 6: Module Numbering
1-8
Introduction
In addition, various Daktronics drawings may contain the following labeling formats:
• “TB_ _” shows a termination block for power or signal cable.
• “F_ _” denotes a fuse.
• “E_ _” signifies a grounding point.
• “J_ _” stands for a power or signal jack.
• “P_ _” represents a power or signal plug for the opposi t e jack.
Finally, drawings commonly have Daktronics part numbers. You can use those part
numbers when requesting replacement parts from Daktronics Customer Service.
Take note of the following part number formats:
• “0P-_ _ _ _-_ _ _ _” gives the form of an individual circuit board, such as a
module driver.
• “0A-_ _ _ _-_ _ _ _” represents an assembly, such as a circuit board and the
plate or bracket to which it mounts. A collection of circuit boards working
as a single unit may also carry an assembly label.
• “W-_ _ _ _” indicates a wire or cable. Cables may also carry the assembly
numbering format in certain circumstances. This is especially true of ribbon
cables.
• “F-_ _ _ _” signifies a fuse.
Most circuit boards and components within this sign carry a label that lists the part
number of the unit. If the Replacement Parts List in Section 4. 13 does not list a
circuit board or assembly, use the label to order a replacement.
Figure 7 on the right
illustrates a typical label. The part number is in bold.
Figure 7: Typical Label
Introduction
1-9
Section 2: Mechanical Installation
Note: Daktronics does not guarantee the warranty in situations where the display is not
constantly in a stable environment.
Daktronics engineering staff must approve an
of the display. If you make any modifications, you must submit detailed drawings of the
changes to Daktronics for evaluation and approval, or you may void the warranty.
Daktronics is not responsible for installations or the structural integrity of support
struc
tures done by others. The customer is responsible to ensure a qualified structural
engineer approves the structure and any additional hardware.
2.1 Mechanical Installation Overview
y changes that may affect the weather-tightness
Because every installation site is unique, Daktronics has no single procedure for
mounting Galaxy
or may not be appropriate for your particular installation.
A qualified installer must make all decisions re
display.
Read both the mechanical and electrical installati
before beginning any installation procedures.
®
displays. This section contains general information only and may
2.2 Support Structure Design
Support structure design depends on the mounting methods, display size, and weight.
Since the structure design is critical, only a qualified individual should mount the
display. Display height and wind loading are also critical factors. It is the customer’s
responsibility to ensure that the structure and mounting hardware are adequate.
Daktronics is not responsible for the installations or the structural inte gri t y of
support structures done by others.
The installer is responsible to ensure the mounting
capable of supporting the display and agrees with local codes.
Before beginning the installation proces s, verify the following:
• The mounting structure provides a straight and square frame for the display.
• The mounting structure supports the display without yielding at any
unsupported points after mounting.
• Clearance: 3" of unobstructed space is available below the display for
ventilation. 1¼" of unobstructed space is available above the top of the
display.
Correct any deficiencies b
efore installation.
garding the mounting of this
on sections of this manual
structure and hardware are
Electrical Installation
2-1
2.3 Ventilation Requirements
Reference Drawings:
Shop Drawings.........................................................Refer to Appendix A
Fans mounted in the backsheets toward the top of the display allow for ventilation.
Maintain a minimum distance of 3" (7.62 cm) below the display to maintain proper
airflow. Refer to the appropriate Shop Drawing for additional information.
If the display cabinet is completely enclosed:
• Provide 6 square inches of unobstructed ope ni n g per module to ensure
adequate cooling.
• Make allowances to compensate for the percentage of material covering the
openings in the structure.
• For adequate cooling, the cabinet may require forced ventilation. If the
enclosed cabinet must use forced ventilation, it must ventilate at a rate of 10
cubic feet per minute per module (28" x 28" active area).
Failure to comply with these requirements voids the Galaxy
2.4 Lifting the Display
®
display warranty.
The top of the display has eyebolts to lift the unit. Do not exceed the rated load of
the eyebolts. Refer to the information at the end of this section labeled Eyebolts to
determine the allowable load of the eyebolts shipped with the display.
Figure 8 illustrates both the correct (left example) and the incorrect (right example)
method of lifting a display. Lift the display as shown on the left, with the lifting bar.
Use every lifting point provided.
Figure 8: Lifting the Displays (left; correct) and (right; incorrect)
Do not attempt to permanently support the display by the eyebolts.
If you remove the eyebolts, adequately seal the holes using 13 bolts and sealing
washers, ½ inch in size. Silicone along the threads to ensure water does not enter the
display.
2-2
Electrical Installation
2.5 Display Mounting
Reference Drawings:
Assy, Grounding and Fan Harness ............................. Dra
The method used to mount displays varies greatly from location to location. For this
reason
, the manual covers only general mounting topics.
The installer is responsible to
codes and standards. The installer is also responsible for the mounting method
and hardware.
Before beginning the installation proces s, verify the following items:
• The mounting structure will provide a straight and square frame for the sign.
Height variation in any four-foot horizontal section may not exceed ¼- inch.
• The mounting structure will not give way at any unsupported points after the
sign is mounted.
The back of the display uses 3x2x
ShopDrawings. These angles assist in mounting the display. Remember to have all
mounted displays inspected by a qualified structural engineer.
The customer must ha
attachment points needed and the wall structure to ensure both meet all nationa l and
local codes. Daktronics recommends using all clip angles as attachment points.
1. Carefu
possible damage cased during shipping.
2. Fol
lowing the guidelines described in Section 2.4, lift the display into
position on the support structure using all provided eyebolts.
3. W
eld or use ½" Grade-5 bolts and hardware to secure the clip angles to the
support structure as shown in Top View in ShopDrawings. Refer to
Section 3 for information on routing power and sig nal .
4. (For Sectional Displays Only): Rem
Using all lift eyes provided, lift the top section over the bottom section.
Align the holes as required for 5/8" hardware. Secure sections using 5/8"
hardware, as shown in the Shop Drawings. Connect power and signal (refer
to DrawingsA-175194, A-184111, and B-184326). The sign is then ready
for installation.
5. Upon
completing the installation, carefully inspect the display for any holes
that may allow water to seep into the display. Seal any openings with
silicone. If you remove the eyebolts on the top of the display, plug the holes
with bolts and the rubber sealing washers that you removed with the
eyebolts. Silicone the threads on the bolts.
ve a qualified structural engineer review the number of
lly uncrate the display. Look each side of the display over for
wing A-175194
32x***-89, RGB.................Drawing A-184111
wing B-184326
er to Appendix A
ensure the installation will adequately meet local
3
/8" steel clip angles at the locations shown in the
ove lift eyes from the bottom section.
Electrical Installation
2-3
2.6 Optional Temperature Sensor
If you have an optional temperature sensor to be used with your display, see
Appendix C for mounting and signal connections.
2-4
Electrical Installation
Eyebolts
Almost every display that leav es D ak tronics is equipped w ith ey ebolts for lifting the display . There are
two standard sizes of eyebolts: ½″ and A″.
Load Increase Factor: The load increases as the lift angle (θ) decreases. The allowable load on the
eyebolts also decreases with the lift angle due the bending stress on the eyebolts. In sum, the smaller
the angle between the cable and the top of the display, the lighter the sign must be to safely lift it. Do
NOT attempt to lift the display when the lift angle is less than 30 degrees.
A. Do not use eyebolts on angular lifts unless absolutely necessary. For angular lifts, the shoulder pattern
eyebolt is preferred.
B. Load should always be applied to eyebolts in the plane of the eye, not at some angle to this plane.
C. Shoulder eyebolts must be properly seated (should bear firmly against the mating part), otherwise the
working loads must be reduced to those indicated for regular eyebolts. A washer or spacer may be
required to put the plane of the eye in the direction of the load when the shoulder is seated.
D. No load greater than the safe working load listed in the data table should be used.
E. To obtain the greatest strength from the eyebolt, it must fit reasonably tight in its mounting hole to prevent
accidental unscrewing due to twist of cable.
F. Eyebolts should never be painted or otherwise coated when used for lifting. Such coatings may cover
potential flaws in the eyebolt.
G. To attain the safe working loads listed for regular eyebolts, 90% of the thread length must be engaged.
Copyright 1996-2001 ED-7244
Daktronics, Inc. Rev. 4 – 14 March 2001
Section 3: Electrical Installation
Only a qualified individual should terminate the power and signal cable within this Daktronics
display.
The Daktronics engineering staff must approve any changes made to the display. Before
altering the display, submit detailed drawings for the proposed modifications to the
Daktronics engineering staff for evaluation and approval or you will render the warranty null
and void.
3.1 Common Connectors in the Display
The power and signal connections in the displays use many different
types of connectors. Take special care when disengaging any connector,
as not to damage the connector, the cable, or the circuit board. When
pulling a connector plug from a jack, do not pull on the wire or cable;
pull on the jack itself. Pulling on the wires may damage the connector.
The following information presents some common connectors
encountered during sign installation and maintenance:
1. Ribbon Cable Connectors:
Figure 9illustrates a typical ribbon connector. To disconnect the
ribbon cable, push the plastic clips on the sides to unlock and
remove the jack.
Before replacing a ribbon cable connector, spray it with DeoxIT
contact cleaner to remove any foreign matter that may cause signal
problems. In addition, apply a generous amount of CaiLube
™
protector paste to the plug before inserting it into the jack. This
paste protects both the plug and the jack from corrosion.
2. Termination Blocks:
Termination blocks connect internal power and signal wires to
wires of the same type coming into the sign from an external
source. Most signal wires come with forked connectors crimped to
the ends of the wire. Power wires need to have one-half inch of
insulation stripped from the end of the wire prior to termination.
Tighten all screws firmly to ensure a good electrical connection.
Refer to
Figure 10.
3. Phoenix
™
-Style Connectors:
Phoenix-style connectors, usually green, allow for signal
termination on circuit boards. Refer to
Figure 11. Strip one-quarter
inch of insulation from the wire prior to termination. To remove a
wire, turn the above screw counter-clockwise to loosen the
connectors grip on the wire. To insert a wire, push the bare wire into the
connector and turn the above screw clockwise to lock the wire into place.
Figure 9: Ribbon
Cable Connector
™
Figure 10: Termination
Block
Figure 11: Phoenix
Connector
Electrical Installation
3-1
4. Mate-n-Lok
™
Connectors:
The white Mate-n-Lok connectors found in the signs come in
a variety of sizes.
Figure 12 illustrates a five-pin Mate-n-Lok
connector. To remove the plug from the jack, squeeze the
plastic locking clasps on the side of the plug and pull it from
the jack.
5. Fiber Optic Connectors:
A fiber optic cable has a “twist-on” connector at each end.
To remove the fiber plug, push it toward the board and twist
it counter-clockwise until you can pull the plug from the
jack.
Figure 13 shows this connector.
Figure 13: Fiber Optic Cable
6. Phone Jacks (RJ11 Connectors):
RJ connectors, as seen in
Figure 14, are similar to the telephone
connectors found in homes. In order to remove this plug from the
jack, depress the small clip on the underside of the plug.
Before replacing an RJ connector, spray it with DeoxIT
™
contact
cleaner to remove any foreign matter that may cause signal problems.
In addition, apply a generous amount of CaiLube
™
protector paste to
the plug before inserting it into the jack. This paste will protect both
the plug and the jack from corrosion.
7. Quick Connect Jack:
The display uses quick connect jacks for the connection of the signal
termination enclosure, the temperature sensor and possible
connection to an echo display. There are three input and one output
quick connect jacks located on the back of the primary display, and
when not used the attached dust cover should be kept closed.
To attach the cable to a jack, make sure to line up the plug to match
the jack, push the plug in then turn the outer collar to lock in place.
Figure 15 illustrates the 6-pin quick connect jack.
Figure 12: Mate-n-
Loc Connector
Figure 14: RJ11
Connector
Figure 15: RS232/6-pin
Quick Connect Jack
3-2
Electrical Installation
3.2 Control Cable Requirements
RS232
This cable is a 2-conductor shielded cable used to transmit an RS232 signal
(Daktronics part number W-1117). This shielded cable should not be subjected to
mechanical flexing after installation. This cable is not for direct burial and should be
routed in a dedicated, grounded, metallic conduit at the base of the display structure.
This cable has a maximum length of 25 feet (approximately 7.6 meters).
RS422
This cable is a 4-conductor shielded cable used to transmit an RS422 signal
(Daktronics part number W-1234, Manhattan number M4473.) This shielded cable
consists of unpaired wires. They should not be subjected to mechanical flexing after
installation. This cable is not for direct burial and should have one of the following
routings:
• In d
• Insi
With interface signals (such as power conducto
foot separation is required. The maximum length of an RS422 signal cable is 4,000
feet (approximately 1.22 km).
edicated metallic conduit
de buildings-if cable is not in conduit, keep away from interface signals
rs, intercom, etc.), typically a two-
Modem
The modem option will use standard telephone cable routed through conduit. The
phone cable and power cannot be routed in the same conduit. The local
telephone company will need to assist in this installation. Ask the telephone
company which color is used for the TIP wire and which for the RING wire for
signal hook up to the display.
Note: T
system.
he telephone line must be a dedicated line and not run through a switchboard
Fiber Optic
This cable is a 4-fiber cable (Daktronics part number W-1376). Two fibers are used
for display communications and the other two are saved for spares. The cable may be
either direct burial or routed in conduit, but should not be subjected to mechanical
flexing. The maximum length of a fiber optic cable is 2,000 feet (approximately 600
meters) from the signal converter to the fiber optic board in the display.
Electrical Installation
3-3
Radio
The server radio connected to the J-box requires an 18-gauge, six-conductor shielded
cable (Daktronics part number W-1370). Four-conductors will be used for the signal
and two for power. These wires need to be in conduit when exposed to outdoor
conditions to the server radio. The maximum distance from the RS422 J-box to the
server radio is 1000 feet (approximat e l y 330 me t ers).
The client radio at the display comes with a 25 foot quick connect cable that is rated
for outdoor use and does not need to be in conduit. Any excess cable shoul d be
secured to protect it from weather and vandalism.
Ethernet
Note: The use of a quick connect inter-connect cable or separately wired cable is not
allowed between two of more displays if the input to the first display is Ethernet.
Fiber Ethernet
This cable is a 4-fiber cable (Daktronics part number W-1376). Two fibers are used
for display communications and the other two are saved for spares. The cable may be
either direct burial or in conduit, but it should not be subjected to mechanical
flexing. The maximum length of the fiber optic cable from one media converter
connected to the network and the second media converter in the display is 1.2 miles
(approximately 2000 meters).
Ethernet
This cable is an 8-conductor network cable (Daktronics part number W-1467 Cat-5,
or W-1384 Cat-5E). The cable should not be subjected to mechanical flexing after
installation. This cable is not for direct burial and should have one of the following
routings:
• In dedicated metallic conduit, separate from the power.
• Inside buildings-if cable is not in conduit, keep away from interface signals
With interference signal, such as power conductors, intercom, etc., typically a twofoot separation is required. The maximum length of an Ethernet signal cable is 330
feet (approximately 100 meters) from the network hub or switch to the surge board
in the display.
3.3 RJ Connector Cables
RJ connectors are of two basic types. They consist
of the RJ11 connector that uses a six-conductor
cable, and the RJ45 that uses an 8-conductor
cable. This type of connector can be found on
many telephones and LANs.
Both the RJ11 and RJ45 cables used inside the
display are pinned as straight through cables.
Exterior cables used for a network are often
Figure 16: 6-Conductor RJ11 Connector and Cable
3-4
Electrical Installation
flipped cables. This type of cable, as shown in
image of the other end. When installing a network, to ensure correct cabling, always
install the cable from the output jack of one display to the input jack of the next
display.
Figure 17: Flipped Cable with RJ Connectors
3.4 Conduit
Reference Drawings:
Shop Drawings......................................................... Refer to Appendix A
Daktronics does not include the conduit. Refer to Shop Dra w i ngs for approximate
locations of power and signal conduit. You must use separate conduit to route:
• Power
• Signal IN wires
• Signal OUT wires (if another sign requires si gnal)
Locate the conduit holes at the bottom right (rear view) of the back of the display
(refer to Shop Drawings).
Punch or drill out the desired conduit openings. Be careful not to damage any
internal components. Attach the conduit, and then route the power and signal cables.
For displays with more than one face, signal and temperature sensor wiring between
displays can route through the same conduit.
Figure 17, has one end that is a mirror
Electrical Installation
3-5
3.5 Preparing for Power/Signal Connection
Reference Drawings:
Shop Drawings.........................................................Refer to Appendix A
If the display needs openings for the power and sig nal, p unch out the knockouts in
the lower right corner from the rear. Refer to Shop Drawings for more information.
1. With a 7/32" nutdriver, apply
pressure to latch and turn it a
quarter-turn counter-clockwise. The
module door will swing open to the
left.
2. Route power to the display through
a fused disconnect switch capable of
opening all ungrounded po w e r
conductors. Locate this disconnect
within the line of sight of any
personnel performing mai nt enance
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.
3. Power conductors from the
disconnect to the display must route through conduit in agreement with
local codes.
4. You may also route the signal cable from the control computer to the sign at
this time. Run the power and signal cables in separate conduit.
Figure 18: Opening the Display
3.6 Power
Reference Drawings:
Power Specs, AF-3197, RGB LEDs............................ Drawing A-183906
Refer to Drawing A-183906 for voltage and current requirements for your display
size. Each uses a 120/240VAC single-phase or 120/208 three-phase power source.
Do not connect the displays to any voltage other than what is 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.
3-6
Electrical Installation
Grounding
Displays must be grounded according to the provisions outlined in Article 250 of the
National Electrical Code
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.
®
. Daktronics requires a resistance to ground of 10 ohm s or
Figure 19: Display Grounding
A minimum of one grounding electrode must be installed for each display face. The
grounding electrode is typically one grounding rod for each display face. Other
grounding electrodes as described in Article 250 of the National Electric Code may
be used. Daktronics requires that the resistance to ground be 10 ohms or less. If the
resistance to ground is higher than 10 ohms, it will be necessary to install additional
grounding electrodes to reduce the resistance. The grounding electrode should be
installed within 25 feet of the base of the display. The grounding electrode must be
connected to the ground terminal in the display panel board.
This grounding electrode must be installed in addition to the equipment-grounding
conductor that should be part of the power installation. The material of an earthground electrode differs from region to region and from conditions present at the
site. 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. The grounding system and grounding
electrodes must be installed according to Article 250 of the National Electrical Code
and any applicable local codes.
Electrical Installation
3-7
Power Installation
There are two considerations for power installation: installation with ground and
neutral conductors provided and installation with only a neutral conductor provided.
For these displays, installation with ground and neutral conductors provided is used.
Installation with Ground and Neutral Conducto s Provided
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 lines and neutral can be disconnected. The
National Electrical Code requires the use of a lockable power disconnect within sight
of or at the display.
3.7 Main Disconnect
The National Electrical Code requires the use of a lockable power disconnect near
the display. Provide a lockable disconnect switch (knife switch) at the display
location so that all power lines can be completely disconnected. Use a 3-conductor
disconnect to disconnect both the hot lines and the neutral. Mount the main
disconnect at or near the point of power supply connection to the display. Provide a
main disconnect for each supply circuit to the display.
You must locate the means of d
or outline lighting that it controls. This requirement provides protection by enabling
a worker to keep the disconnecting means within view while working on the d isplay.
Exception:
locked in the open position elsewhere.
You may locate the disconnecting means that are capable of being
r
isconnection in a direct line-of-sight from the display
3-8
Electrical Installation
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