Federal Signal Corporation Vision SLR Series Manual

2562540
REV. C4 0820
Printed in U.S.A.
© Copyright 2015-2020 Federal Signal Corporation
Installation, Maintenance,
and Service Manual
Vision®SLR Light Bar

blank page
Limited Warranty
This product is subject to and covered by a limited warranty,
a copy of which can be found at www.fedsig.com/SSG-Warranty.
A copy of this limited warranty can also be obtained by written
request to Federal Signal Corporation, 2645 Federal Signal Drive,
University Park, IL 60484, email to [email protected] or
call [phone].
This limited warranty is in lieu of all other warranties, express or
implied, contractual or statutory, including, but not limited to the
warranty of merchantability, warranty of tness for a particular
purpose and any warranty against failure of its essential purpose.
2645 Federal Signal Drive
University Park, Illinois 60484-3167
www.fedsig.com
Customer Support
Police/Fire-EMS: 800-264-3578 • [phone]
Work Truck: 800-824-0254 • [phone]
Technical Support 800-433-9132 • [phone]
All registered trademarks are properties of their respective owners.

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Contents
Safety Messages.............................................................................................................................. 6
Safety Message to Installers and Service Personnel of Warning Lights...........................................6
Safety Message to Operators of Warning Light Equipment.................................................................9
An Overview of the Vision SLR Light Bar ................................................................................... 11
LED Lights and Colors ................................................................................................................................... 11
LED Flash Rates and Positions.................................................................................................................... 11
Modular Connector System (Optional)...................................................................................................... 11
Controller Options ......................................................................................................................................... 12
Operating Temperature................................................................................................................................ 12
Preparing the Vision SLR for Installation ................................................................................... 13
Unpacking the Light Bar .............................................................................................................................. 13
Connecting the Vision SLR for Programming......................................................................................... 13
Selecting External SignalMaster Control................................................................................................. 15
Selecting Internal SignalMaster Control (Factory Default).................................................................. 15
Entering Program Mode............................................................................................................................... 17
Exiting Program Mode.................................................................................................................................20
Wiring the Vision SLR in the Vehicle .......................................................................................... 21
Planning the Electrical Installation............................................................................................................. 21
Connecting Power to the Light Bar ......................................................................................................... 23
Installing the Serial Interface Module...................................................................................................... 23
Wiring the Serial Interface Module...........................................................................................................25
Maintaining and Servicing the Vision SLR ................................................................................. 36
Cleaning the Light Bar Domes .................................................................................................................. 36
Replacing a Dome ........................................................................................................................................ 37
Replacing a Pod ............................................................................................................................................ 38
Replacing an LED Alley Light..................................................................................................................... 39
Removing and Replacing the Light Bar Cover ....................................................................................... 41
Removing and Reinstalling the SignalMaster........................................................................................ 42
Servicing the SignalMaster ........................................................................................................................ 43
Replacing the Light Bar Controller ........................................................................................................... 45
Quick Disconnect Option for Power and CAT5 .................................................................................... 46
Troubleshooting the Light Bar................................................................................................................... 49
Quick Testing the Vision SLR with the Light Bar Test..........................................................................50
Testing the Steady Burn LEDs (HotFoot Only) ....................................................................................... 51
Getting Technical Support and Service....................................................................................... 51

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Figures
Figure 1 Serial Interface Module connections for programming ........................................................... 14
Figure 2 Connectors and switches on the Serial Interface Module ..................................................... 18
Figure 3 Relay-isolating devices with large filter capacitors ................................................................. 25
Figure 4 Wiring block diagram ...................................................................................................................... 25
Figure 5 SignalMaster flash sequences...................................................................................................... 28
Figure 6 SignalMaster control functions wired to 12 Vdc for internal Serial Interface Module con-
trol ..........................................................................................................................................................................29
Figure 7 SignalMaster control functions wired to 12 Vdc for internal Serial Interface Module con-
trol .......................................................................................................................................................................... 30
Figure 8 Typical connections with a SignalMaster controller (external control)................................ 31
Figure 9 Typical connections with a SW400SS Switch Module (internal control) ........................... 32
Figure 10 Typical connections with a SmartSiren Model SS2000SM controller.............................. 33
Figure 11 Typical connections with a non-SignalMaster controller....................................................... 34
Figure 12 Typical connections with a PA640 controller.......................................................................... 35
Figure 13 Dome removal and replacement................................................................................................ 37
Figure 14 Pods 1 and 5 rotated counterclockwise for removal ............................................................. 39
Figure 15 Alley light removal: exploded view ............................................................................................ 40
Figure 16 Screws securing the light bar cover ........................................................................................... 41
Figure 17 Screws securing the SignalMaster............................................................................................. 42
Getting Repair Service.................................................................................................................................. 51
Ordering Replacement Parts ..................................................................................................................... 52
Tables
Table 1 Dimensions ........................................................................................................................................... 12
Table 2 Light Specifications ........................................................................................................................... 12
Table 3 Electrical Specifications.................................................................................................................... 12
Table 4 SW2 DIP switch settings in the Serial Interface Module.......................................................... 16
Table 5 Control wires from the Serial Interface Module......................................................................... 17
Table 6 Switch settings for Intersection operation .................................................................................20
Table 7 SignalMaster control wires and warning patterns ................................................................... 28
Table 8 Troubleshooting tips ........................................................................................................................ 49
Table 9 Replacement parts............................................................................................................................52

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Figure 18 SignalMaster removed from the light bar................................................................................. 43
Figure 19 SignalMaster disassembled......................................................................................................... 44
Figure 20 Controller connectors................................................................................................................... 45
Figure 21 Controller location beneath light bar cover............................................................................. 46
Figure 22 Locations of watertight connectors .......................................................................................... 46
Figure 23 Secondary lock mechanism in the plug and receptacle..................................................... 47

6Vision SLR Light Bar
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Safety Messages
Safety Messages
For your safety, read and understand this manual thoroughly before installing,
operating, and servicing the Vision SLR light bar. The safety messages presented in
this section and throughout the manual are reminders to exercise extreme care at all
times. To download copies of the manual, go to www.fedsig.com or call the Federal
Signal Service Department at 1-800-433-9132, 7 a.m. to 5 p.m., Monday through Friday
(CT).
Safety Message to Installers and Service Personnel of Warning Lights
People’s lives depend on your proper installation and servicing of Federal Signal
products. It is important to read and follow all instructions shipped with this product.
Listed below are some other important safety instructions and precautions you should
follow.
Before Installation or Service
Qualifications
• To properly install or service this equipment, you must have a good understanding
of automotive mechanical and electrical procedures and systems, along with
proficiency in the installation and service of safety warning equipment. Always
refer to the vehicle service manuals when performing equipment installations on a
vehicle.
Light Hazards
• To be an eective warning device, this product produces bright light that can be
hazardous to your eyesight when viewed at a close range. Do not stare directly
into this lighting product at a close range, or permanent damage to your eyesight
may occur.
• Do not install the light system in an area that would block, impair, or blind the
driver’s vision. Ensure that the light system is mounted in a position that is outside
of the driver’s field of vision, so the driver can safely operate the vehicle.
• Federal Signal power supplies and light heads are designed to work together as
a system. Combining light heads and a power supply from dierent manufacturers
may reduce the warning eectiveness of the lighting system and may damage
the components. Verify or test your combination to ensure that the system works
together and meets federal, state, and local standards or guidelines.
Electrical Hazards
• Strobe systems present a shock hazard because they use high voltage to operate.
Do not handle strobe cables, the power supply, or bulbs or remove the lens while
the equipment is connected. Strobe systems can also hold their charge even after
they have been turned o. After disconnecting power to the unit, wait five minutes
before handling any parts of the strobe system.

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Safety Messages
• A light system is a high current system. In order for the system to function
properly, a separate negative (–) connection and positive (+) connection must
be made. All negative connections should be connected to the negative battery
terminal and a suitable fuse should be installed on the positive battery terminal
connection as close to the battery as possible. Ensure that all wires and fuses are
rated correctly to handle the device and system amperage requirements.
• Never attempt to install aftermarket equipment that connects to the vehicle wiring
without reviewing a vehicle wiring diagram available from the vehicle manufacturer.
Ensure that your installation will not aect vehicle operation or mandated
safety functions or circuits. Always check the vehicle for proper operation after
installation.
• The lighting system components, especially light bulbs, strobe tubes, LEDs, and
the outer housing, get hot during operation. Be sure to disconnect power to the
system and allow the system to cool down before handling any components of the
system.
• Halogen light bulbs and strobe tubes are pressurized and, if broken, can burst and
result in flying glass. Always wear gloves and eye protection when handling these
components.
• Do not mount a radio antenna within 18 inches (45.7 cm) of the lighting system.
Placing the antenna too close to the lighting system could cause the lighting
system to malfunction or be damaged by strong radio fields. Mounting the
antenna too close to the lighting system may also cause the radio noise emitted
from the lighting system to interfere with the reception of the radio transmitter and
reduce radio reception.
• Do not attempt to wash any unsealed electrical device while it is connected to its
power source.
During Installation and Service
• DO NOT get metal shavings inside the product. Metal shavings in the product
can cause the system to fail. If drilling must be done near the unit, place an ESD-
approved cover over the unit. Inspect the unit after mounting to be sure there are
no shavings present in or near the unit.
• To avoid a battery explosion, always disconnect the negative battery cable first
and reconnect it last. Avoid causing a spark when connecting near or to the
battery. The gases produced by a battery can caused a battery explosion that
could result in vehicle damage and serious injury.
• DO NOT connect this system to the vehicle battery until ALL other electrical
connections are made, mounting of all components is complete, and you have
verified that no shorts exist. If the wiring is shorted to the vehicle body or frame,
high current conductors can cause hazardous sparks resulting in electrical fires or
flying molten metal.
• DO NOT install equipment or route wiring (or the plug in cord) in the deployment
path of an airbag.

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Safety Messages
• If a vehicle seat is temporarily removed, verify with the vehicle manufacturer if the
seat needs to be recalibrated for proper airbag deployment.
• Before mounting any components, check the manual to be sure that the
component you are installing is suitable for use in that area of the vehicle. Many
components are not suitable for use in the engine compartment or other extreme
environmental exposure areas.
• The service life of light bulbs and strobes tubes will be shortened if the
glass portion is touched during installation. Use gloves when handling these
components. If the glass portion has been touched, clean the glass carefully with
isopropyl alcohol.
• When drilling into a vehicle structure, ensure that both sides of the surface are
clear of anything that could be damaged. Remove all burrs from drilled holes. To
prevent electrical shorts, grommet all drilled holes through which wiring passes.
Also, ensure that the mounting screws do not cause electrical or mechanical
damage to the vehicle.
• Refer to the manual packed with the lighting system for proper electrical
connections, additional precautions, and information.
• Because vehicle roof construction and driving conditions vary, do not drive a
vehicle with a magnetically mounted warning light installed. The light could fly
o the vehicle, causing injury or damage. Repair of damage incurred because of
ignoring this warning shall be the sole responsibility of the user.
• To avoid denting the roof of the vehicle, place the light bar mounting feet as close
to the outer edge of the roof as possible.
• Roof damage can occur if the hook adjustment bolts are overtightened. Tighten
the adjustment bolts to 6 ft-lb to 7 ft-lb. Install keeper plates.
• Locate the light system controls so the VEHICLE and CONTROLS can be operated
safely under all driving conditions.
After Installation or Service
• After installation, test the light system to ensure that it is operating properly.
• To ensure proper operation, test all vehicle functions, including horn operation,
vehicle safety functions, and vehicle light systems. Ensure that the installation
has not aected the vehicle operation or changed any vehicle safety function or
circuit.
• Scratched or dull reflectors, mirrors, or lenses will reduce the eectiveness of
the lighting system. Avoid heavy pressure and use of caustic or petroleum-based
products when cleaning the lighting system. Replace any optical components that
may have been scratched or crazed during system installation.
• Do not attempt to activate or deactivate the light system control while driving in a
hazardous situation.
• Frequently inspect the light system to ensure that it is operating properly and that
it is securely attached to the vehicle.

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Safety Messages
• After installation and testing are complete, provide a copy of these instructions to
instructional sta and all operating personnel.
• File these instructions in a safe place and refer to them when maintaining and/or re-
installing the product.
Failure to follow these precautions may result in property damage, serious injury, or
death.
Safety Message to Operators of Warning Light Equipment
People’s lives depend on your safe use of our products. Listed below are some
important safety instructions and precautions you should follow:
• Do not attempt to activate or deactivate the light system control while driving in a
hazardous situation.
• Although your warning system is operating properly, it may not be completely
eective. People may not see or heed your warning signal. You must recognize
this fact and continue to drive cautiously.
• Situations may occur that obstruct your warning signal when natural and man-
made objects are between your vehicle and others, such as raising your hood or
trunk lid. If these situations occur, be especially careful.
• The eectiveness of an interior mounted warning light depends on the clarity, the
tinting, and the angle of the glass it is being placed behind. Tinting, dirt, defects,
and steeply angled glass reduce the light output of the warning light. This may
reduce the eectiveness of the light as a warning signal. If your vehicle has dirty,
tinted, or steeply angled glass, use extra caution when driving your vehicle or
blocking the right of way with your vehicle.
• All eective sirens and horns produce loud sounds that may cause, in certain
situations, permanent hearing loss. You and your passengers should consider
taking appropriate safety precautions, such as wearing hearing protection.
• In order to be an eective warning device, this product produces bright light that
can be hazardous to your eyesight when viewed at a close range. Do not stare
directly into this lighting product at a close range or permanent damage to your
eyesight may occur.
• It is important that you fully understand how to safely operate this warning system
before use.
• Operate your vehicle and its light/sound system in accordance with your
department’s Standard Operating Procedures.
• If a selected function does not perform properly or if any of the lamps remain
illuminated when the control is o, disconnect the power connector from the control
unit and contact the nearest service center.
• At the start of your shift, ensure that the entire warning light system and the siren
system is securely attached and operating properly.

10 Vision SLR Light Bar
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Safety Messages
• Suction cup mounting is for temporary applications only. The unit should be
removed from the window and stored securely when not in use. Temperature
changes and sunlight can cause suction cups to lose holding power. Periodically
check the unit to be sure the suction cups have a firm grip on the mounting
surface. An improperly secured light could fall o of the vehicle, causing injury and
damage.
• Holding power of magnetic mounting systems is dependent upon surface finish,
surface flatness, and thickness of the steel mounting surface. Therefore, to
promote proper magnetic mounting:
• Keep the mounting surface and magnets clean, dry, and free of foreign particles
that prevent good surface contact.
• Ensure that mounting surface is flat.
• Do not use a magnet mounting system on vehicles with vinyl tops.
• To prevent sliding of light assembly on mounting surface, avoid quick
acceleration and hard stops.
Failure to follow these precautions may result in property damage, serious injury, or
death.

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An Overview of the Vision SLR Light Bar
An Overview of the Vision SLR Light Bar
The Vision SLR is a rotating LED light bar, employing fixed LED boards and rotating
Solaris S2 reflectors. V-shaped construction lets the Vision SLR warning system
maximize light warning eciency at crucial intersection angles. The individual domes
are shaped to eliminate critical dome angles, which reflect rather than transmit light
in other light bars, significantly improving light transmission (brightness). Vision
SLR continues and improves its predecessor’s revolutionary aerodynamic styling to
provide superior vehicle fuel eciency and top speed.
LED Lights and Colors
The LED pods are positioned to provide 360-degree coverage. The warning system’s
LED pods are available in multicolor. Exclusive to Federal Signal, SpectraLux®
technology provides for entirely new color combinations. One pod can have more
than one color, for example, rotating red, switching to blue, and then switching to
white when the takedown function is activated. Single color pods are also available.
All pods are Smart Pods and are preprogrammed to provide a wide selection of
warning light patterns. Pattern selection can be performed during or after installation.
Takedown and alley functions of the LED pods have horizontal tracking capability for
use as spotlights.
Fixed LED Alley lights in the end caps are available as a configured option.
Horizontally adjustable LED takedown lights in the mounting feet are available with
the HotFoot®option (configured).
An optional LED rear directional light, the eight-head SignalMaster™, provides
additional warning capability using a common control. The SignalMaster has pre-
programmed light patterns which provide supplemental warning for any hazardous
situation.
LED Flash Rates and Positions
Quiet, smooth, precise, and ecient positioning stepper motors control the Solaris S2
reflectors and have a longer life than conventional DC motors. The motors provide a
variety of flash rate options, oscillation angles, and the ability to jog a light head to the
desired fixed position. In addition, each reflector allows two LEDs to shine upward for
the aerial location of the vehicle.
Modular Connector System (Optional)
The Vision SLR light bar is available hardwired or with an optional waterproof (IP67)
external connector system for power and communication. The external connector
enables you to remove the light bar from the vehicle without opening the light bar or
the vehicle hood. The light bar is protected against reversed polarity damage. The
Vision SLR Light Bar may be installed in any vehicle with a 12-volt NEGATIVE ground
electrical system.

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An Overview of the Vision SLR Light Bar
Controller Options
Flash patterns are controlled through the light bar’s CAT5 communication cable. The
cable connects to the Serial Interface Module (Part Number 8583446), the Federal
Signal Six-Button Serial Controller (Part Number 8623133), the Three-Button Serial
Controller (Part Number 8623141), or the SmartSiren®Series Platinum System or the
System control head only.
Other advanced features of the Vision SLR Light Bar include:
• A high degree of reliability through the use of advanced microprocessors and other
integrated circuits.
• Modular construction with easily replaceable pods and domes to greatly reduce
spare parts inventory.
• High output, long-life LEDs with no bulbs to change.
Table 1 Dimensions
Model Length Height Depth Weight*
VSLR46 45.4 in (115.3 cm) 5.8 in (14.7 cm) 27.9 in (70.9 cm) 59.3 lb (26.9 kg)
VSLR53 52.3 in (132.8 cm) 5.8 in (14.7 cm) 30.2 in (76.7 cm) 64.4 lb (29.2 kg)
VSLR60 59.3 in (150.6 cm) 5.8 in (14.7 cm) 33.2 in (84.3 cm) 67.5 lb (30.6 kg)
*With SignalMaster and standard mounting feet. Alley light caps add 1 inch (2.5 cm) to
length
Table 2 Light Specications
Lighting Option Current Draw Lamp Technology Reector Style
LED (all heads) 2.2 A* per pod High brightness LED Offset, compound curve, polished
reector
*Amperage in Steady Burn Mode
Table 3 Electrical Specications
Current Draw*
25 A maximum with SignalMaster, HotFoot®, and alley light caps
*Amperage for a typically loaded light bar with all lights flashing at 50 percent duty
cycle
Operating Temperature
−40º F to 149º F (−40º C to 65º C)

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Preparing the Vision SLR for Installation
Preparing the Vision SLR for Installation
Taking the preparatory steps in this section before mounting and wiring the light
bar to a vehicle will help ensure that your installation is fast, easy, and error free. In
addition to instructions for quick testing the light bar, this section also has instructions
for changing default settings and flash patterns with the Serial Interface Module. The
number of available flash patterns vary between the Serial Interface Module and the
SmartSiren®Platinum System. If you are using the SmartSiren Platinum System, refer
to the “Smart Siren Platinum Installation, Maintenance, and Service Manual” (Doc.
No. 2562502) and to the “Smart Siren Platinum Control Pad Configuration Software
Manual” (Doc. No. 2562418) for programming instructions.
Unpacking the Light Bar
Carefully unpack the light bar assembly and any other products included in the
shipment. Inspect them for damage that may have occurred during shipping. If a
product has been damaged, do not install or operate it. Immediately file a claim with
the carrier describing the damage. Carefully check all envelopes, shipping labels,
and tags before removing or destroying them. If you are missing any parts, contact
Customer Support at 1-800-264-3578, 7 a.m. to 5 p.m., Monday through Friday (CT).
Connecting the Vision SLR for Programming
HEAVY OBJECT: Use lifting aids and proper lifting techniques when removing
or replacing this product. Failure to follow this warning may cause personal
injury.
REVERSE POLARITY/MISWIRING: Reverse polarity may damage the siren
amplier. To avoid damage to the siren/amplier, ensure that the battery
voltage is the same voltage as the rating of the light and that the correct
polarity is observed.
The Vision SLR does not require any internal wiring. Two 10 AWG power conductors
(red and black) and a CAT5 cable exit the light bar. The light bar’s basic light functions
are communicated through the CAT5 cable, which connects to the Serial Interface
Module, SmartSiren Platinum, or other Federal Signal controllers.
The electrical connections in this section enable you to perform a quick test of the
light bar with the Serial Interface Module. The Serial Interface Module communicates
between an installer-supplied light bar/siren controller, a SignalMaster controller, or a
switch box and the light bar. To minimize the number of discrete wires to the light bar,
control head functions are wired to the Module through a 3-foot-long, 24-conductor
cable harness (Table 5 on page 17). The information is converted to a digital format
and communicated through the CAT5 serial communication cable.

14 Vision SLR Light Bar
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Preparing the Vision SLR for Installation
The numbers in the steps below refer to the wires in Figure 1. To connect the Vision
SLR to the battery and Serial Interface Module:
1. To supply power to the light bar, use a fully-charged 12-volt automotive battery
with terminal lugs.
2. Place the light bar on a sturdy, flat surface.
3. Plug the CAT5 communication cable (1) from the light bar into the Serial Interface
Module (J1).
4. Plug the 24-pin harness (2) into the Serial Interface Module.
5. Attach the light bar’s black ground power line (3) to the negative battery (–GND)
plug.
6. Attach the light bar’s red power line (4) through a 40 A Maxi fuse to the positive
battery (+BAT) lug.
7. Attach the white wire (5) from the 24-pin harness through a 1 A fuse to the positive
battery (+BAT) lug.
8. Attach the black wire and the black/white wire (6) from the 24-pin harness to the
negative battery (–GND) lug.
Figure 1 Serial Interface Module connections for programming
290A6593
Serial
Interface
Module
Power Line (Red)
Ground Power Line (Black)
Black Wire
Black / White Wire
CAT5
Com.
Cable
(Gray)
White Wire 24-Pin Harness
5
+ –
12 Vdc
Power
Source
4
3
1
2
6
Fuse
1 A
Fuse
40 A Maxi

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Preparing the Vision SLR for Installation
Selecting External SignalMaster Control
The Interface Module comes factory-set for the INTERNAL SignalMaster®option. (See
“Selecting Internal SignalMaster Control [Factory Default].”) With EXTERNAL control
the Interface Module drives each SignalMaster head independently via an external
Federal Signal SignalMaster controller or the SS2000SM Series Siren. Either device
will provide an independent ground signal to illuminate each head.
To select External SignalMaster control:
1. Unplug the 24-pin harness from the Serial Interface Module.
2. Move Switch 4 on SW2 to the up (OFF) position (Table 4).
3. Plug the 24-pin harness into the Serial Interface Module.
Selecting Internal SignalMaster Control (Factory Default)
The Interface Module SignalMaster control leads are defined in Table 5 on page 17.
The SignalMaster can be configured for internal operation. Power (+BAT) applied to
the specified control lead activates the light bar’s internal SignalMaster controller.
The Internal SignalMaster setting controls the flash pattern, rather than driving each
SignalMaster head.
To select Internal SignalMaster control:
1. Unplug the 24-pin harness from the Serial Interface Module.
2. Move Switch 4 on SW2 to the down (ON) position.
3. Plug the 24-pin harness into the Serial Interface Module.

16 Vision SLR Light Bar
Federal Signal www.fedsig.com
Preparing the Vision SLR for Installation
Table 4 SW2 DIP switch settings in the Serial Interface Module
SW2
Switch
Number
Switch Setting
Function
Up
(OFF)
Down
(ON)
1
✔
Front/Rear LEDs cut off (turn off) when 12 Vdc is applied their
control wires
1
✔
Front/Rear LEDs enable (turn on) when 12 Vdc is applied to their
control wires
2
✔
Keep in OFF position.
3
✔
✔
Intersection when 12 Vdc is applied to blue/black wire.
Light Bar Test when 12 Vdc is applied to black/white/red wire.
Left Scene Light turns on when 12 Vdc is applied to blue/black
wire.
Right Scene Light turns on when 12 Vdc is applied to black/white/
red wire.
Intersection and Light Bar Test are unavailable. This function
applies only to light bars with SpectraLux technology.
4
✔
SignalMaster, Internal controller
4
✔
SignalMaster, External controller
5
✔
Cycle forward through the selection of ash patterns
5
✔
Cycle backward through the selection of ash patterns
6
✔
Operation Mode
6
✔
Program Mode
7 Switch for Intersection operational settings (Table 6 on page 20).
8 Switch for Intersection operational settings (Table 6)

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Preparing the Vision SLR for Installation
Entering Program Mode
To switch the module from Operation Mode to Program Mode:
1. Unplug the 24-pin harness from the Serial Interface Module.
2. On the Serial Interface Module, move Switch 6 on SW2 to the down (ON) position.
3. Plug the 24-pin harness into the Serial Interface Module.
Table 5 Control wires from the Serial Interface Module
Light Bar Controls Wire Color Description
Mode 1 Blue Lowest priority
Mode 2 Blue/White Overrides Mode 1.
Mode 3 Black/Red Overrides Modes 1 and 2.
Steady Burn
(HotFoot only)
Red/White One or more LEDs steadily burn when 12 Vdc
is applied to the control wire for a Mode and the
control wire for Steady Burn.
Front Cutoff Green/White Turns off the front of the light bar.
Front Enable Turns on the front of the light bar.
Rear Cutoff Orange/Black Turns off the rear of the light bar.
Rear Enable Turns on the rear of the light bar.
Low Power White/Black/Red Dims the lights approximately 50 percent to
prevent blinding approaching drivers. Low Power
is only available in Modes 1 and 2 and is disabled
when switched to another ash pattern, including
Mode 3 and Intersection.
Flash Takedown/Alley Red/Black Flashes the alley and takedown lights in Modes 1,
2, or 3.
Left Alley Green/Black Turns on left alley lights. Overrides the Flash
Takedown/Alley lights.
Right Alley Orange/Red Turns on right alley lights. Overrides the Flash
Takedown/Alley lights.
Takedown White/Black Provides white light to the front. Overrides Flash
Takedown/Alley lights and front cutoff.
Intersection
(SW2 Switch 3 in the
up position)
Scene Light, Left
(SW2 Switch 3 in the
down position)
Blue/Black Typically a high activity pattern. Overrides all three
priority modes. Scene Light, Left is unavailable.
Applying 12 Vdc to the Scene Light, Left wire
turns on the left half of the light bar. Intersection is
unavailable.
Light Bar Test Pattern
(SW2 Switch 3 in the
up position)
Scene Light, Right
(SW2 Switch 3 in the
down position)
Black/White/Red Flashes the LEDs sequentially and then ashes
the takedown and alley lights. Scene Light, Right is
unavailable.
Applying 12 Vdc to the Scene Light, Right wire
turns on right half of the light bar. Light Bar Test
Pattern is unavailable.

18 Vision SLR Light Bar
Federal Signal www.fedsig.com
Preparing the Vision SLR for Installation
SW2 DIP Switch Settings in the Serial Interface Module
For the location of SW2, see Figure 2. For the SW2 switch settings for programming
the light bar, see Table 4 on page 16.
Figure 2 Connectors and switches on the Serial Interface Module
J3 Connector for Serial
Cable from Light Bar
J1 Connector for 24-Conductor Cable
Supplied with Serial Interface Module
SW2 Dip Switches (See
Table 4 on Page 16.)
Programming Header for Cloning Flash
Patterns from Vehicle to Vehicle. (See the
Instructions Included with the Programmer.)
SW1 Button for Selecting Flash
Patterns
290A7689
Selecting a Flash Pattern for Modes 3, 2, 1, and Intersection
The three modes operate with Mode 3 having the highest priority: Mode 3 overrides
Mode 2, and Mode2 overrides Mode 1. When the light bar operates in one of these
modes, the SignalMaster®modules keep sequence with the flash pattern.
You can change default Mode flash patterns by programming each mode with one of
patterns in the light bar’s library. The following is a typical setup:
• Mode 1: Rear LEDs
• Mode 2: Front/Rear LEDs
• Mode 3: Siren (SmartSiren®or Federal Signal compatible), Front/Rear LEDs, and
Flash Takedown/Alley LEDs on the main bar
• Modes 1 and 2: Front/Rear Cuto
NOTE: If the light bar needs to be programmed after you connect a progressive slide
switch, the programming sequence must be Mode 3, Mode 2, Mode 1, Intersection.
When you press and release the SW-1 button on the Serial Interface Module to select
a pattern, the light bar briefly turns o and then displays the next pattern. To cycle
backwards to a previous pattern, move Switch 5 to ON (up position) on SW2.
Mode 3
To set a Mode 3 flash pattern:
1. Apply 12 Vdc (+BAT) to the Mode 3 control wire (black/red) from the Serial
Interface Module to display the assigned pattern.
2. On the Serial Interface Module, press and release the SW-1 button until the pattern
you want displays on the light bar.

19
Installation, Maintenance, and Service Manual
Federal Signal www.fedsig.com
Preparing the Vision SLR for Installation
3. Remove 12 Vdc from the Mode 3 control wire.
Mode 2
To set a Mode 2 flash pattern:
1. Apply 12 Vdc (+BAT) to the Mode 2 control wire (blue/white) from the Serial
Interface Module to display the assigned pattern.
2. On the Serial Interface Module, press and release the SW-1 button until the pattern
you want displays on the light bar.
3. Remove 12 Vdc from the Mode 2 control wire.
Mode 1
To set a Mode 1 flash pattern:
1. Apply 12 Vdc (+BAT) to the Mode 1 control wire (blue) from the Serial Interface
Module to display the assigned pattern.
2. On the Serial Interface Module, press and release the SW-1 button until the pattern
you want displays on the light bar.
3. Remove 12 Vdc from the Mode 1 control wire.
Intersection
This procedure only programs the Intersection pattern. It does not assign the pattern
to a Mode. The Intersection flash pattern overrides all three priority modes when
activated. To select a new pattern, you must apply 12 Vdc to the control wire for either
Mode 1, 2, or 3 (Table 5 on page 17) and the blue/black control wire for Intersection.
SW2 Switch 3 on the Serial Interface Module must be in the up position for this
function.
NOTE: With the flexibility of the SmartSiren®Platinum System, both the Intersection and
the Scene Light, Left option are available without the need to choose one or the other.
1. Apply 12 Vdc (+BAT) to a control wire for either Mode 1, 2, or 3, and the control
wire for Intersection from the Serial Interface Module.
2. On the Serial Interface Module, press and release the SW-1 button until the pattern
you want displays on the light bar.
3. Remove 12 Vdc from the Mode and Intersection control wires.
Intersection Operational Settings
Select one of three options to turn on the Intersection pattern:
• HIGH with +BAT power maintained (default): the light bar displays the Intersection
pattern until power is removed.
• TAP II (push-on/push-o): The Intersection flash pattern is turned on and o by
pressing a momentary contact switch, such as a horn button. Momentary 12 Vdc
turns on the pattern, a second momentary 12 Vdc signal turns it o.

20 Vision SLR Light Bar
Federal Signal www.fedsig.com
Preparing the Vision SLR for Installation
• 8-SECOND TIMEOUT activated by +BAT: momentary 12Vdc turns on the
Intersection flash pattern for 8 seconds.
To change from HIGH to TAP II or 8-SECOND TIMEOUT:
1. Unplug the 24-pin harness from the Serial Interface Module.
2. On the Serial Interface Module, set Switch 7 and Switch 8 on SW2 to select a
method of operation (Table 6). Each setting is independent of the other.
3. Plug the 24-pin harness into the Serial Interface Module.
Table 6 Switch settings for Intersection operation
Operational Settings
SW2
SW7 SW8
High (+BAT maintained) OFF (up) OFF (up)
Tap II (+BAT, push on/push off ) ON (down) OFF (up)
8-Second Timeout (activated by +BAT) OFF (up) ON (down)
Front/Rear Cutoff or Enable
The operational setting for Front/Rear Cuto or Enable must be programmed after
Mode and Intersection. The default setting is for Cuto, in which the Front or Rear
LEDs turn o when 12Vdc (+BAT) is applied to their control wires. In contrast, Enable
turns on these LED modules when +BAT is applied to their control wires. Both the
front and rear LEDs share the same operational setting and are not independent.
To program this feature:
1. Unplug the 24-pin harness from the Serial Interface Module.
2. On the Serial Interface Module, move Switch 1 on SW2 to:
• the down (on) position for Front/Rear Enable.
• the up (o) position for Front/Rear Cuto.
3. Plug the 24-pin harness into the Serial Interface Module.
NOTE: When set to Enable, 12 Vdc must be applied to a Mode control wire and the
Front and/or Rear Enable control wire for the light bar to operate.
In a typical installation, if you want only the Rear LED modules to flash in Mode 1, set
the operation for Enable. Connect the green/white and blue/white control wires to
the Mode 2 connection and the orange/black, and blue control wires to the Mode 1
connection.
Exiting Program Mode
When you are finished programming patterns, switch the Serial Interface Module from
Operation Mode to Program Mode.
1. Unplug the 24-pin harness from the Serial Interface Module.