Federal Signal Corporation MicroPulse MPS U Series User manual

Safety Message to Installers of Siren Speakers
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.
• 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’s service manuals when performing
equipment installations on a vehicle.
• 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 the driver’s field of vision so the driver
can safely operate the vehicle.
• A light system is a high current system. 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 the outer housing, get hot during operation. Disconnect
power to the system and allow the system to cool down before handling any components of the
system.
• 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.
• 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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• Before 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. Ensure that the mounting screws do not cause electrical or
mechanical damage to the vehicle.
• 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.
• Locate the light system controls so the VEHICLE and CONTROLS can be operated safely under all
driving conditions.
• After installation, test the light system to ensure that it is operating properly.
• Test all vehicle functions, including horn operation, vehicle safety functions, and vehicle light systems
to ensure proper operation. Ensure that the installation has not aected the vehicle operation or
changed any vehicle safety function or circuit.
• Scratched or dull reflectors or lenses will reduce the eectiveness of the lighting system. Avoid heavy
pressure and the 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 controls 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.
• 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 reinstalling the
product. Failure to follow all safety precautions and instructions may result in property damage,
serious injury, or death.
Introduction
The light head uses an LED light source to provide a reliable signal with 25 selectable flash patterns.
The light head may be flush mounted or attached to brackets. The light can operate on a nominal 12 or
24Vdc power source. A five-conductor cable protrudes from the base. This light head features FSLink™.
It can be synchronized with up to eight other FSLink products.
Table 1 Specications
Input Voltage 11 TO 28 Vdc
Nominal Current Draw MPS3U 0.4 A at 12 V, 0.2 A at 24 V
MPS6U 0.8 A at 12 V, 0.4 A at 24 V
MPS12U 1.5 A at 12 V, 0.8 A at 24 V
Dimensions (With Bezel) MPS3U 3.5 x 1.3 x 0.4 inches (8.89 x 3.30 x 1.02 cm)
MPS6U 5.2 x 1.3 x 0.4 (13.21 x 3.30 x 1.02 cm)
MPS12U 5.3 x 1.9 x 0.4 (13.46 x 4.83 x 1.02 cm)
Product Weight MPS3U 0.10 lb (0.05 kg)
MPS6U 0.13 lb (0.06 kg)
MPS12U 0.20 lb (0.09 kg)

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Unpacking the Kit
After unpacking the kit, inspect it for damage that may have occurred in transit. If it has been damaged,
do not attempt to install or operate it. File a claim immediately with the carrier, stating the extent of the
damage. Carefully check all envelopes, shipping labels, and tags before removing or destroying them.
Ensure that the parts in the Table 2 are included in the package. 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).
Table 2 Kit contents
Qty. Description Part Number
2 #6 Phillips Pah Head Stainless Steel Screw 7011205-12
1 MPS3U Gasket 861302855
MPS6U Gasket 861302587
MPS12U Gasket 861302850
1 MPS3U Bezel, Black 861302854-B
MPS6U Bezel, Black 861302130-B
MPS12U Bezel, Black 861302849-B
Figure 1 Exploded view
Red
White
Black
Green
Brown
Gasket
Light Head
Screw (2)
Bezel

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Mounting the Light Heads
AIRBAG DEPLOYMENT: Do not install equipment or route wiring in the deployment path of an
airbag. Failure to observe this warning will reduce the eectiveness of the airbag or potentially
dislodge the equipment, causing serious injury or death.
To mount the light head:
1. Using the light head as a guide or the dimensions in Figure 2, scribe the three drill position marks at
the selected mounting location.
Figure 2 Drilling
3.05 in
MPS3U
4.72 in
MPS6U
4.72 in
MPS12U
DRILLING PRECAUTIONS: Before drilling holes, check the area you are drilling into to be sure
you do not damage vehicle components while drilling. All drilled holes should be de-burred and
all sharp edges should be smoothed. All wire routings going through drilled holes should be
protected by a grommet or convolute/split loom tubing.
2. Drill two 1/8-inch mounting holes and an 11/16-inch wire routing hole at the marked positions.

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Installing and Maintaining the Light Head
Wiring the Light Head
REVERSE POLARITY/MISWIRING: To avoid damage to the light, ensure that the input voltage
is the same as the voltage rating of the light. Ensure that correct polarity is observed.The unit
must be properly fused with a 2 A fuse.
To wire the light head:
1. Determine the required functions and the length of wires needed to access them. A five-conductor
cable can be selected for a full-featured installation. For lengths up to 15 feet (5 m), use a minimum of
18AWG (1 mm2) wire. For lengths over 15 feet, use a minimum of 16 AWG (1.5 mm2) wire. Before wiring
the light head, refer to Table 3 for the function of each wire.
Table 3 Wire connections
Color Description Connection Point
Black Ground Battery Negative
Red Mode 1 Switched Positive 12-24 Vdc
White Mode 2 Switched Positive 12-24 Vdc
Brown Mode 3 Switched Positive 12-24 Vdc
Green Program/FSLink 12-24 Vdc (for Programming Only)
2. Strip 1/4 inch (5 mm) of insulation from the ends of the installer-supplied wires.
3. Use insulated butt connectors to connect the wires to the power cable of the light head. Ensure that
the connectors are securely crimped and properly insulated.
4. Connect the end of the fuse holder to the positive (+) terminal of the voltage source.
5. Connect the black wire from the light head to a known good vehicle ground as close to the light
head as practical.
6. The black wire is ground and must be connected to a suitable chassis ground if it cannot be taken
directly to the negative terminal of the battery.
7. The green wire has multiple functions: If using the light head with an external flasher, this wire is tied
directly to chassis ground. This allows an external flasher to control each color independently via the
Mode wires. If using the light head’s internal flasher, it is the runner wire that synchronizes FSLink™
equipped products, and it serves as the function/pattern programming wire.
8. The red wire powers the light head in Mode 1 when connected to a fused, positive voltage.
9. The white wire powers the light head in Mode 2 when connected to a fused, positive voltage.
10. The brown wire powers the light head in Mode 3 when connected to a fused, positive voltage.
NOTE: Mode 3 overrides Mode 2, which overrides Mode 1.

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Conguring the Light Head
If the light head’s operating functions are to be changed from the default perform the following steps.
Selecting a Flash Pattern
LIGHT HAZARD: To be an eective warning device, this product produces a 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.
For available flash patterns, see Table 4 on page 9.
To select a flash pattern:
1. Select Mode 1 (red wire), Mode 2 (white wire), or Mode 3 (brown wire).
2. Apply power (+12-24 Vdc) to that wire.
3. To activate FSLink™, tap the green wire to + 12-24 Vdc until the desired pattern is reached.
NOTE: When tapping the green wire to change patterns, do not hold power for longer than one second,
or other features of the light head can change.
Selecting FSLINK Sync or Alt Flash
The light head can synchronize with other light heads. It will either flash with or alternate the timing of
the flashes with other light heads. Select this feature separately for each mode.
To synchronize your selected flash pattern:
1. Activate a Mode.
2. Connect and hold the green wire to the positive voltage source until the light head pulses twice, and
then release it.
The light head switches from its initial setting to its opposite. “Sync Flash” becomes “Alternate Flash”
or vice versa.
3. To synchronize, after setup, connect the green wires together.
For this feature to operate, permanently connect all green wires after all light heads in the system are
configured.
NOTE: For sync to work properly, all light heads connected via FSLink must have the same pattern
selected for all modes used.
Selecting Flash Color(s) (if equipped with more than one color)
The light head can be made to either flash a single, dual, or triple color. This is done separately for each
Mode.
To select the number of colors for a mode’s flash pattern:
1. Activate the mode for which this color feature is to be set.
2. Connect and hold the green wire to the power until the light head pulses three times, and then
release it.

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3. The light head switches from its initial setting to add the next available number of colors.
4. Repeat until the desired color(s) are flashing.
NOTE: Changing the Flash Color(s) also resets the Color Order (see below).
Selecting the Color Order (if “Flash Colors” is set to ash more than one color)
You can set the order in which a light head flashes the colors. The order is selected separately for each
Mode.
To select the color order:
1. Activate the Mode for which this color feature is to be set.
2. Hold the green wire to the positive voltage source until the light head pulses four times, and then
release the wire. The light head switches color from the initial setting to the next color. For example, a
dual-color, amber-red light head set to flash amber and then red will change to flashing red and then
amber.
Selecting the Split Zone Flash Settings (MPS6U and MPS12U Only)
You can set whether the light head flashes all zones together or alternates them. The split zone setting is
selected separately for each Mode.
To select the split zone settings:
1. Activate the Mode for which this split zone feature is to be set.
2. Hold the green wire to the positive voltage source until the light head pulses five times, and then
release the wire. The light head switches zone settings from the initial setting to the next available
split zone setting. For example, the MPS6U can switch from all zones simultaneous flashing to
vertical split flashing. The MPS12U includes vertical, horizontal, and quad-x split zone settings.
Selecting the Brightness
You can set one of three brightness settings for each mode (Full, Dim, and Cruise).
To select the brightness setting:
1. Activate the Mode for which this feature is to be set.
2. Hold the green wire to the positive voltage source until the light head pulses six times, and then
release the wire. The light head switches intensity from the initial setting to the next available
intensity setting.
Resetting the Light Head to the Default Settings
To reset the light head mode to the default settings, apply power to the green wire while any Mode is
powered.
Hold the wire to the power source until the light head pulses seven times and then remove power. All
Modes and options will reset to the default configuration.
NOTE: If the green wire is held for more than 8 seconds, no change occurs and the light head will

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resume normal operation.
Cleaning the Light Heads
Periodically cleaning the light heads using proper procedures and compatible cleaners will prolong their
service life.
CRAZING/CLEANING SOLUTIONS: The use of cleaning solutions, such as strong detergents,
solvents, and petroleum products, can cause crazing (cracking) of the light bar lens and
reectors. To clean the reectors, use a soft, damp cloth. To clean the lens, use a soft cloth and
a solution of water and a mild detergent.
CRAZING/CHEMICALS: Crazed, cracked or faded lenses or reectors reduce the light output
and the eectiveness of the lighting system. A lens or reectors showing this type of aging
must be replaced. Failure to follow this warning may result in bodily injury or death.

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Quick Reference
Table 4 Light Head Wiring
Wire Internal Flasher Mode External Flasher Mode
Red To +VDC for Mode 1 To +VDC for Color 1 Steady
White To +VDC for Mode 2 To +VDC for Color 2 Steady
Brown To +VDC for Mode 3 To +VDC for Color 3 Steady
Green FSLink Sync To - Chassis Ground
+VDC for
Programming
Black To - Chassis Ground To - Chassis Ground
Table 5 Programming Quick Reference
Program Wire Held Feedback Programming Sel.
Less than 1 Second 1 Flash Pattern Select
Between 1-2 Seconds 2 Flashes FSLink Sync or Alt
Between 2-3 Seconds 3 Flashes Flash Color(s) Select
Between 3-4 Seconds 4 Flashes Color Order Select
Between 4-5 Seconds 5 Flashes Split Flash Select
Between 5-6 Seconds 6 Flashes Brightness Select
Between 6-7 Seconds 7 Flashes Default ALL Modes
Table 6 Internal Flasher Mode Defaults
Mode 1 - Flash Pattern #10 Steady Burn, Cruise Intensity
Mode 2 - Flash Pattern #1 Triple 92.3 FPM, All Colors
Mode 3 - Flash Pattern #10 Steady Burn, Full Intensity
Table 7 Flash Patterns
No. Description Flash Pattern Compliance
1 Triple 92.3 SAE/NFPA/TRIPLE-K
2 Triple 90 SAE/NFPA/TRIPLE-K
3 Single 122 SAE/R65/NFPA/TRIPLE-K
4 Single 75 SAE/TITLE13/NFPA/TRIPLE-K
5 Single 90 SAE/TITLE13/NFPA/TRIPLE-K
6 Single 113 SAE/TITLE13/NFPA/TRIPLE-K
7 Cruise Flicker n/a
8 Mega 375 -
9 Random SAE/TITLE13
10 Steady Burn n/a
11 Single 75 SAE/TITLE13/NFPA/TRIPLE-K
12 Single 120 SAE/TITLE13/NFPA/TRIPLE-K
13 Double 80 SAE/TITLE13/NFPA/TRIPLE-K
14 Double 120 SAE/TITLE13/R65/NFPA/
TRIPLE-K
15 Triple 80 SAE/TITLE13/NFPA/TRIPLE-K
16 Triple 120 SAE/TITLE13/NFPA/TRIPLE-K
17 Quad 60 SAE/TITLE13
18 Quad 75 SAE/TITLE13/NFPA/TRIPLE-K
19 Quad 95 SAE/TITLE13/NFPA/TRIPLE-K
20 FedPulse 75 SAE/TITLE13
21 Quint 75 SAE/TITLE13/NFPA/TRIPLE-K
22 Seven X 80 SAE/TITLE13/NFPA/TRIPLE-K
23 SingleQuad 120 SAE/TITLE13/NFPA/TRIPLE-K
24 Decelerating 60 SAE/TITLE13
25 Accelerating 60 SAE/TITLE13

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Getting Technical Support
For technical support, please contact:
Federal Signal Corporation
Service Department
Phone: [phone]
Fax: [phone]
Email: [email protected]
Getting Repair Service
The Federal Signal factory provides technical assistance with any problems that cannot be handled
locally. Any product returned to Federal Signal for service, inspection, or repair must be accompanied
by a Return Material Authorization (RMA). Obtain a RMA from a local Distributor or Manufacturer’s
Representative. Provide a brief explanation of the service requested, or the nature of the malfunction.
Address all communications and shipments to the following:
Federal Signal Corporation
Service Department
2645 Federal Signal Dr.
University Park, IL 60484-3167

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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 info@fedsig.
com 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 fitness 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]
© Copyright 2020-2021 Federal Signal Corporation
All product names or trademarks are properties of their respective owners.