Federal Signal Corporation PA4000 Manual

MODEL PA4000
ELECTRONIC SIREN
INSTALLATION, OPERATION, AND SERVICE INSTRUCTIONS
Distributed By:

LIMITED WARRANTY
The Signal Division, Federal Signal Corporation (Federal), warrants each
new product to be free from defects in material and workmanship, under
normal use and service, for a period of two years on parts replacement and
one year on labor from the date of delivery to the first user purchaser.
During this warranty period, the obligation of Federal is limited to repairing
or replacing, as Federal may elect, any part or parts of such product which
after examination by Federal discloses to be defective in material and/or
workmanship.
Federal will provide warranty for any unit which is delivered, transported
prepaid, to the Federal factory or designated authorized warranty service
center for examination and such examination reveals a defect in material
and/or workmanship.
This warranty does not cover travel expenses, the cost of specialized
equipment for gaining access to the product, or labor charges for removal
and re installation of the product. Lamps, flash tubes, or batteries are not
covered under warranty.
This warranty does not extend to any unit which has been subjected to abuse,
misuse, improper installation or which has been inadequately maintained,
nor to units which have problems relating to service or modification at any
facility other than the Federal factory or authorized warranty service
centers.
THERE ARE NO OTHER WARRANTIES, EXPRESSED OR IMPLIED,
INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. IN NO EVENT SHALL FEDERAL BE LIABLE FOR ANY
LOSS OF PROFITS OR ANY INDIRECT OR CONSEQUENTIAL
DAMAGES ARISING OUT OF ANY SUCH DEFECT IN MATERIAL OR
WORKMANSHIP.

SECTION I
GENERAL DESCRIPTION
-1-
Figure 1-1. Model PA4000 Electronic Siren.
The Federal Model PA4000 is a precision built,
efficient and economical full-featured electronic siren
of advanced design. It provides ail, yelp and priority
siren tones, as ell as the Tap II feature, public
address (PA), radio rebroadcast and an air horn
sound.
The siren may be installed in negative ground
vehicles ith 12-volt electrical systems. It is pro-
tected against failure modes (including reversed
polarity) by a fuse that is replaceable ithout tools.
No components protrude from the bottom of the siren
to interfere ith mounting arrangements.
The siren is made up of an Amplifier and a
Control Head. The Amplifier is suitable for mounting
in a dry, adequately ventilated location, hile the
Control Head is designed for flush mounting in the
vehicle interior. Communication bet een the t o
units is via an RJ45 telephone connector.
A noise-cancelling microphone is ired-in to
prevent loss or theft. It provides high quality voice
reproduction ithout feedback (squeal). The micro-
phone push-to-talk s itch overrides any siren signal
for instant PA use. PA and radio volume are preset at
the factory for maximum gain.
The Model PA4000 is designed to drive one or
t o 100 att speakers. Using t o 100- att speakers
ill provide maximum traffic clearing po er.
The Tap II feature allo s the driver to change
the siren sound via the vehicle’s horn ring or any
remotely mounted s itch.
A horn ring s itch allo s the driver to deter-
mine the function of the horn ring. LEDs indicate
hen the vehicle horn is disabled and the horn ring
is controlling either Tap II or the air horn tone.
Other special features of the Model PA4000
include:
• High degree of reliability is achieved
through the use of a CMOS microprocessor
and silicon output transistors.
• Control panel is illuminated ith non-glare
lighting.
• Ne ly designed printed circuit board
provides improved performance and dura-
bility under a ide range of environmental
conditions.
• AUX/OUT can drive an external relay for
controlling other devices, such as arning
lights.
• AUX/IN input can activate ail hen the
siren selector is in the manual position.
• Park-Siren Deactivator can deactivate siren
tones hen the vehicle is shifted into
PARK.
• A diagnostic capability for speaker testing
uses t o LEDs for visual indication and
four test tones for audible indication.

SECTION II
SPECIFICATIONS
Input Voltage ..................................................... 11 Vdc to 16 Vdc
Polarity ............................................................... Negative ground electrical systems only
Standby Current ................................................ 250mA (backlighting extinguished)
Operating Current (Control Head & Ampl.) .... 13A ±1A (at 13.6V ith 5.5-ohm load)
Frequency Range ............................................... 725 to 1600 Hz (nominal)
Cycle Rate .......................................................... Wail- 14 cycles/min.
Yelp- 180 cycles/min.
Voltage Output (approx.)................................... 62V peak-to-peak
Audio Frequency Range .................................... 300 to 3KHz
Harmonic Audio Distortion ............................... 10% max. all po er levels from 1/2 to 50 atts
(300-3000Hz) (frequency response ±3dB)
Operating Temperature Range ......................... -30°C to +65°C
Dimensions (HWD)
Control Head ............................................... 2.9" x 6.3" x 1.5"
Amplifier Module ........................................ 3.6" x 6.9" x 4.8"
Shipping Weight (approx.) ................................ 7 pounds
-2-

-3-
SECTION III
INSTALLATION
SAFETY MESSAGE TO INSTALLERS
OF
ELECTRONIC SIRENS
WARNING
The lives of people depend on your proper installation and
servicing of Federal products. It is important to read and
follo all instructions shipped ith the products. In addition,
listed belo are some other important safety instructions and
precautions you should follo :
Before Installation
Qualifications
• To properly install an electronic siren: you must have a
good understanding of automotive electrical procedures
and systems, along ith proficiency in the installation
and service of safety arning equipment. Al ays refer to
the vehicle's service manuals hen performing
equipment installations on a vehicle.
Sound azards
• Your hearing and the hearing of others, in or close to
your emergency vehicle, could be damaged by loud
sounds. This can occur from short exposures to very loud
sounds, or from longer exposures to moderately loud
sounds. For hearing conservation guidance, refer to
federal, state, or local recommendations. OSHA
Standard 1910.95 offers guidance on “Permissible Noise
Exposure.”
• All effective sirens and horns produce loud sounds (120
dB) that may cause permanent hearing loss. Al ays
minimize your exposure to siren sound and ear hearing
protection. Do not sound the siren indoors or in enclosed
areas here you and others ill be exposed to the sound.
• Federal Signal siren amplifiers and speakers are
designed to ork together as a system. Combining a
siren and speaker from different manufacturers may
reduce the arning effectiveness of the siren system and
may damage the components. You should verify or test
your combination to make sure the system orks
together properly and meets federal, state and local
standards or guidelines.
During Installation
• 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 to prevent metal shavings
from entering the unit. Inspect the unit after mounting
to be sure there are no shavings present in or near the
unit.
• 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 iring is shorted to vehicle frame,
high current conductors can cause hazardous sparks
resulting in electrical fires or flying molten metal.
• Be sure the siren amplifier and speaker(s) in your
installation have compatible attage ratings.
• In order for the electronic siren to function properly, the
ground connection must be made to the NEGATIVE
battery terminal.
• Sound output ill be severely reduced if any objects are
in front of the speaker. If maximum sound output is
required for your application, you should ensure that the
front of the speaker is clear of any obstructions.
• Install the speaker(s) as far for ard on the vehicle as
possible, in a location hich provides maximum
signaling effectiveness and minimizes the sound
reaching the vehicle’s occupants. Refer to the National
Institute of Justice guide 500-00 for further information.
• Mounting the speakers behind the grille ill reduce the
sound output and arning effectiveness of the siren
system. Before mounting speakers behind the grille,
make sure the vehicle operators are trained and
understand that this type of installation is less effective
for arning others.
• Sound propagation and arning effectiveness ill be
severely reduced if the speaker is not facing for ard.
Carefully follo the installation instructions and al ays
install the speaker ith the projector facing for ard.
• DO NOT install the speaker(s ) or route the speaker
ires here they may interfere ith the operation of air
bag sensors.
• Installation of t o speakers requires iring speakers in
phase.
• Never attempt to install aftermarket equipment, hich
connects to the vehicle iring, ithout revie ing a
vehicle iring diagram - available from the vehicle
manufacturer. Insure that your installation ill not
affect vehicle operation and safety functions or circuits.
Al ays check vehicle for proper operation after
installation.
• DO NOT install equipment or route iring or cord in the
deployment path of an air bag.
• Locate the control head so the vehicle, controls, and
microphone can be operated safely.
• When drilling into a vehicle structure, be sure that both
sides of the surface are clear of anything that could be
damaged.
After Installation
• After installation, test the siren system and 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 installation has
not affected vehicle operation or changed any vehicle
safety function or circuit.
• After testing is complete, provide a copy of these
instructions to the instructional staff and all operating
personnel.
• File these instructions in a safe place and refer to them
hen maintaining and/or reinstalling the product.
Failure to follo all safety precautions and instructions may
result in property damage, serious injury, or death to you or others.

-4-
3-1. UNPACKING.
After unpacking the Model PA4000, examine it
for damage that may have occurred in transit. If the
equipment has been damaged, file a claim immedi-
ately ith the carrier stating the extent of the
damage. Carefully check all envelopes, shipping
labels and tags before removing or destroying them.
3-2. AMPLIFIER INSTALLATION.
CAUTION
The Amplifier is NOT aterproof. It must be
mounted in a location hich is sheltered from
falling rain, sno , standing ater, etc. Also,
it must be installed in an adequately venti-
lated area. Never install near heater ducts.
Do not mount the Amplifier under the vehicle’s
hood.
A. Select a suitable mounting location for the
Amplifier. Some possible mounting locations are: in
the equipment cabinet, under the front seat, or in the
trunk (under the rear deck, near the rear seat speak-
ers, if vehicle is so equipped). Keep in mind that the
control cable is 15 feet long.
B. Using the mounting holes on the amplifier
as a template, scribe four drill position marks at the
mounting location.
CAUTION
Before drilling holes in ANY part of a vehicle,
be sure that both sides of the mounting sur-
face are clear of parts that could be damaged;
such as brake lines, fuel lines, electrical
iring, or other vital parts.
C. The mounting hard are supplied in the
siren accessory kit provides the siren user ith a
choice of mounting hard are; thread-forming scre s
ith lock ashers or 1/4-20 cap scre s ith
lock ashers and hex nuts. Consequently, the holes
drilled in the mounting surface must be appropriate
for the mounting scre s selected. If the thread-
forming scre s are to be used, drill 3/16" holes at the
drill position marks. Drill 9/32" holes at the position
marks if the 1/4-20 cap scre s, lock ashers and nuts
ill be used.
Secure the Amplifier to the mounting
surface, using the mounting hard are, including
lock ashers.
3-3. CONTROL HEAD INSTALLATION.
WARNING
When installing equipment inside air bag
equipped vehicles, the installer MUST ensure
that the equipment is installed ONLY in areas
recommended by the vehicle manufacturer.
Failure to observe this arning ill reduce the
effectiveness of the air bag, damage the air
bag, or potentially damage or dislodge the
equipment, causing serious injury or death to
you or others.
The Control Head is designed to be flush
mounted in any relatively flat surface. To install,
proceed as follo s:
A. Select a location for the Control Head on
the mounting surface that does not impair the
drivers’ ability to safely drive the vehicle as he
operates the siren. The selected location should
afford good visibility and free accessibility to the
Control Head controls.
B. Place the mounting template, supplied in
the accessory kit, over the selected mounting loca-
tion. Scribe a mark for each of the four mounting
holes. Also, scribe a cut mark along the heavy dark
line on the template.
CAUTION
Before drilling holes in ANY part of a vehicle,
be sure that both sides of the mounting sur-
face are clear of parts that could be damaged;
such as brake lines, fuel lines, electrical
iring, or other vital parts.
C. Drill four 0.120 diameter (#31 drill)
mounting holes at the marks scribed in step B.
D. Using a keyhole sa or sabre sa , sa
into the mounting surface at the cutmark scribed in
step B.
NOTE
Before completing the Control Head installa-
tion, perform the procedures in paragraph
3-4, Electrical Installation.
E. With all iring connections complete,
place the Control Head in position and secure to
mounting surface ith four (4) #6B Phillips head
thread-forming scre s (supplied).

-5-
3-4. ELECTRICAL INSTALLATION.
WARNING
When installing equipment inside air bag
equipped vehicles, the installer MUST ensure
that the equipment is installed ONLY in areas
recommended by the vehicle manufacturer.
Failure to observe this arning ill reduce the
effectiveness of the air bag, damage the air
bag, or potentially damage or dislodge the
equipment, causing serious injury or death to
you or others.
A. Control Cable.
The control cable is designed to be installed
bet een the Amplifier and the Control Head. It
consists of an 8-conductor cable terminated on both
ends ith RJ45 connectors. To install the control
cable, proceed as follo s:
1. Install the one end of the control cable
to the mating connector on the Control Head.
2. Route the control cable to ard the
Amplifier.
WARNING
Before drilling holes in ANY part of a vehicle,
be sure that both sides of the surface being
drilled are clear of parts that could be dam-
aged; such as brake lines, fuel lines, electrical
iring, linkages or other vital parts.
3. If routing the cable requires drilling a
hole in sheet metal or other material, drill a 5/8" hole
in the material. Install a 5/8" grommet (not supplied)
or similar protective device in the hole, to protect the
cable from damage hich sharp edges could cause.
4. Install the other end of the control
cable to the mating connector on the Amplifier.
B. Siren Connections.
The unit is supplied ith an eleven-position
connector to perform the electrical installation. User-
supplied 14-gauge red and black ires are required
for the positive (+) and ground (-) connections. User
supplied 18-gauge ires are required for the speaker,
radio, horn s itch, park s itch, backlighting, and
case ground connections.
To install a ire in the eleven-position
connector, strip 1/4" of insulation from the end of the
ire. Then insert the ire into the connector and
tighten the scre at the appropriate connector
position.
1. Speaker.
The unit is designed to operate ith
one 11-ohm impedance speaker (100W) or t o 11-
ohm impedance speakers (100W).
When using one 100W speaker, use 18
gauge ire and connect the speaker leads to positions
1 and 2 of the eleven-position connector as sho n in
figure 3-1.
CAUTION
Improper diagnostic test indications ill result
if speakers are connected in parallel. DO NOT
connect speakers in parallel.
When using t o 100W speakers, they
must be connected in phase. See figure 3-1. On
FEDERAL speakers, this can be accomplished (using
18 gauge ire) by connecting the t o speaker leads
marked “2” to position 1 of the eleven-position
connector. Connect one of the speaker leads marked
“1” to position 2 of the eleven-position connector.
Connect the other speaker lead marked “1” to posi-
tion 3 of the eleven position connector.
2. Radio.
See figure 3-1. To allo incoming radio
messages to be rebroadcast over the outside speak-
ers, connect user-supplied 18 gauge ires to positions
4 and 5 of the eleven-position connector. Connect the
other end of the 18 gauge ires across the t o- ay
radio’s speaker.
3. Aux In.
This input ill activate the ail siren
tone hen the siren selector is in manual.
To use this feature, connect a user-
supplied 18 gauge ire to position 6 of the eleven-
position connector as sho n in figure 3-1.
4. Park-Siren Deactivator.
IMPORTANT
It is the installer’s responsibility to determine
an appropriate location in the vehicle circuitry
to connect this ire.
This feature automatically deactivates
siren tones hen the vehicle is shifted into PARK.
See figure 3-1. To use this feature,
connect a user-supplied 18 gauge ire to position 7 of
the eleven-position connector. Connect the other end
of the ire to a vehicle circuit that is, depending on
the vehicle, grounded or connected to battery posi-
tive (+) hen the vehicle is shifted into PARK.

Figure 3-1. PA4000 Wiring.
-6-
5. Aux Out.
NOTE
This output is activated any time the siren is
operating in Wail, Yelp, or Priority mode.
This feature can be used to activate an
external relay (200mA maximum) for controlling
arning lights.
To use this feature, connect a user-
supplied 18 gauge ire to position 8 of the eleven-
position connector as sho n in figure 3-1.
6. Ground.
Connect a user-supplied 18 gauge
black ire to position 9 of the eleven-position connec-
tor. Connect the other end of the ire to the negative
battery terminal.
7. Ignition.
Connect a user-supplied 18 gauge ire
to position 11 of the eleven-position connector.
Connect the other end of the ire to a vehicle circuit
that is po ered hen the ignition s itch is “on”.
C. Horn Ring Cable.
The horn ring cable assembly, located in
the accessory kit, is a 4- ire cable terminating in an
orange edge connector. This connector should be
installed on the mating 4-pin connector (J2) located
on the Control Head PC board, and should be ori-
ented so that the hite ire is closest to the RJ45
phone jack. The follo ing paragraphs describe the
installation of the leads at the other end of the horn
ring cable.
1. Horn Ring (figure 3-1).
CAUTION
The horn ring transfer circuit of the siren is
capable of s itching a maximum of 10-amperes.
NOTE
An external relay is not required for horn ring
operation.
If the horn ring ill not be used to
control siren operation, fold back and insulate the
WHT and WHT/YEL ires in the po er cable and
290A2697B
FUSIBLE
LINK
TWO (2)
1/4" INSULATED
FEMALE TERMINALS
WIRE
STRIPPING
TYPICAL
11 PIN
CONNECTOR
CONTROL CABLE
CONTROL EAD
BATTERY
POS. AND NEG.
14 GA.
18 GA.
(10)
1/4"
*
**
**
CONTROL
BATTERY
POS
IGN C ASSIS AUX OUT PARK 200mA
MAX.
AUX IN SPKR 1 SPKR 2 RADIO SPKR COM
NEG
FUSE
20
2345678910111
BATTERY
COMMON
GROUND
+
+
+
+
-
LAMP ORN
ORN RING
CUT WIRE
W T/YEL
BLK
RED
W T
4 3 2 1
RELAY
IGNITION SWITC
DAS LIG T OR IGNITION SWITC
PUS ON
PUS OFF
SW
MOMENTARY SW.
VE ICLE SUPPLIED
PARK/NEUTRAL
12VDC
OR
GROUND
**
*
12VDC
OR
GROUND
12VDC
PA PA4000 RADIO
UNIVERSITY PARK, IL. U.S.A.
SPEAKER
NO. 1
1
2
SPEAKER
NO. 2
2 WAY
RADIO
SPEAKER
INPUT
2
1
END VIEW OF
CONTROL EAD
S OWN ERE

-7-
disregard the procedure in this paragraph. Ho ever,
in order to utilize the Tap II and horn ring controlled
Air Horn features of the siren, the follo ing proce-
dure must be performed.
a. Locate the ire that connects the
vehicle horn ring s itch to the horn or horn relay.
Cut this ire.
b. Splice the hite/yello ire in
the horn ring cable to the horn ring side of the ire
that as cut in step a. Insulate the splice ith a ire
nut (supplied).
c. Splice the hite ire in the horn
ring cable to the horn side of the cut ire. Insulate
the splice ith a ire nut (supplied).
2. Lamp.
a. Connect the red ire to the dash
lights circuit or to a vehicle circuit that is po ered
hen the ignition s itch is “on”. This connection ill
supply po er to the Control Head panel lights
henever the headlights are “on” or the vehicle
ignition key s itch is in the “on” position.
b. Connect the black ire to the
negative battery terminal.
The Control Head can no be secured to the
vehicle dashboard.
D. Amplifier Power Connections.
When making the po er connections to the
PA4000, each ire must be terminated ith an
appropriate 1/4" female, insulated, quick-connect
terminal. Complete the iring to the unit as follo s:
1. Crimp the 1/4" female terminals on
one end of user-supplied 14 gauge red and black
ires. See figure 3-1. Connect the red ire to the
“POS” Amplifier connection. Connect the black ire
to the “NEG” Amplifier connection.
WARNING
Before drilling holes in ANY part of a vehicle,
be sure that both sides of the surface being
drilled are clear of parts that could be dam-
aged; such as brake lines, fuel lines, electrical
iring, linkages or other vital parts.
2. If the Amplifier is installed in the
vehicle passenger compartment, it ill be necessary
to drill a 5/8" hole in the vehicle fire all for the
po er and ground leads.
If necessary, drill a 5/8" hole in the
vehicle fire all. Install a user-supplied 5/8" grommet,
or similar device or material, to protect the iring
and cabling against damage from rough edges.
3. Route the leads from the Amplifier to
an area near the battery. (Do not connect to battery
at this time.) If necessary, pass the lead through the
5/8" hole that as drilled in step 2.
4. Connect the black ire to the negative
battery terminal. A secure mechanical and electrical
connection is required.
3- . INSPECTION AND FINAL INSTALLATION.
A. Plug the eleven-position connector into the
mating connector on the unit, and apply pressure
until it locks into place.
WARNING
If ires are shorted to the vehicle frame or
each other, high current conductors can cause
hazardous sparks resulting in electrical fires
and molten metal.
Verify that no short circuits exist before
connecting to the Positive (+) battery termi-
nal.
DO NOT connect this system to the vehicle
battery until ALL other electrical connections
are made and mounting of all components is
complete.
Failure to observe this WARNING ill result
in fire, burns and blindness.
B. Connect the red (+) ire to the positive (+)
terminal of the po er source. A secure mechanical
and electrical connection is required.
3-6. TESTING AFTER INSTALLATION.
WARNING
All effective sirens and horns produce loud
sounds (120 dB) that may cause permanent
hearing loss. Al ays minimize your exposure
to siren sound and ear hearing protection.
Do not sound the siren indoors or in enclosed
areas here you and others ill be exposed to
the sound.
After installation, test the electronic siren,
including horn operation, to ensure that it is operat-
ing properly.
After testing is complete, provide a copy of this
manual to all operating personnel.

SECTION IV
OPERATION
SAFETY MESSAGE TO OPERATORS OF
FEDERAL SIGNAL ELECTRONIC SIRENS
AND LIGHT/SOUND SYSTEMS
WARNING
The lives of people depend on your safe opera-
tion of Federal products. It is important to
read and follo all instructions shipped ith
the products. In addition, listed belo are
some other important safety instructions and
precautions you should follo :
Qualifications
• To properly use an electronic siren and
speaker(s): you must have a good understanding
of general vehicle operation, a high proficiency
in the use of safety arning equipment, and
thorough kno ledge of state and federal
UNIFORM TRAFFIC CODES.
Sound azards
• Your hearing and the hearing of others, in or
close to your emergency vehicle, could be dam-
aged by loud sounds. This can occur from short
exposures to very loud sounds, or from longer
exposures to moderately loud sounds. For
hearing conservation guidance, refer to federal,
state, or local recommendations.
OSHA Standard 1910.95 offers guidance on
“Permissible Noise Exposure.”
• All effective sirens and horns produce loud
sounds (120 dB) that may cause permanent
hearing loss. Al ays minimize your exposure to
siren sound, roll up your indo s and ear
hearing protection. Do not sound the siren
indoors or in enclosed areas here you and
others ill be exposed to the sound. Only use
the siren for emergency response situations.
Sound Limitations
• Before using the vehicle, check to see if the
siren speakers are concealed from vie . If the
siren speaker is not in clear vie on the front of
the vehicle, use extra caution hen operating
the vehicle. A concealed siren speaker installa-
tion is less effective at arning others.
• Maximum sound output ill be severely re-
duced if any objects are in front of the speaker.
If your installation has obstructions in front
of the speaker, drive even more cautiously.
• Frequently inspect the speaker to ensure that
it is clear of any obstruction, such as mud or
sno , hich ill reduce maximum sound
output.
Signaling Limitations
• Be a are that the use of your visual and au-
dible signaling devices does not give you the
right to force your ay through traffic. Your
emergency lights, siren, and actions are
REQUESTING the right-of- ay.
• Although your arning system is operating
properly, it may not alert everyone. People
may not hear, see, or heed your arning signal.
You must recognize this fact and continue
driving cautiously.
• Situations may occur hich obstruct your
arning signal hen natural or man-made
objects are bet een your vehicle and others.
This can also occur hen you raise your hood
or trunk lid. If these situations occur, be espe-
cially careful.
Driving Limitations
• At the start of your shift, you should ensure
that the light/sound system is securely attached
to the vehicle and operating properly.
• If the unique combination of emergency vehicle
equipment installed in your vehicle has
resulted in the siren controls being installed
in a position that does not allo you to operate
them by touch only, OPERATE CONTROLS
ONLY WHILE YOUR VEHICLE IS STOPPED.
• If driving conditions require your full atten-
tion, you should avoid operating the siren
controls hile the vehicle is in motion.
Continuing Education
• File these instructions in a safe place and
refer to them periodically. Give a copy of these
instructions to ne recruits and trainees.
Failure to follo these safety precautions may
result in property damage, serious injury, or death to
you, to passengers, or to others.
-8-

-9-
Figure 4-1. PA4000 Control ead.
MAN
RAD
SPKR TEST
FEDERAL SIGNAL CORPORATION
WAIL
PRTY
YELP
290A2925
LR
A/SIREN
ORN RING
AIR ORN
MANUAL
4-1. GENERAL.
All controls utilized during normal operation of
the Model PA4000 are located on the Control Head
(see figure 4-1).
4-2. SELECTOR SWITCH.
The Selector s itch is a five-position rotary
s itch used to select the mode of operation. The
follo ing are positions on the Selector s itch.
A. RADIO.
In this position, incoming radio messages
are amplified by the siren and rebroadcast over the
outside speaker.
B. MAN.
In this position, it is possible to operate the
siren by activating the AIR HORN/MANUAL paddle
s itch. The siren can also be activated by means of
an auxiliary s itch, such as the horn ring button
(refer to paragraph 4-6).
C. WAIL.
In this position, the siren produces a
continuous “ ailing” sound , up and do n in fre-
quency.
D. YELP.
In this position, a continuous rapid
“ arbled” tone is generated.
E. PRIORITY.
In this position, a continuous extremely
rapid “ arbled” tone is generated.
NOTE
Pressing the microphone push-to-talk s itch
ill override any function and provide instant
public address operation.
4-3. HORN RING SWITCH.
The horn ring s itch determines the function
of the vehicle horn ring.
1. In the center position, the vehicle’s horn
ill sound. Both red LEDs are extinguished.
2. In the left (SIREN) position, the red LED
on the left is illuminated. Pressing the vehicle’s
horn ring activates the Tap II function and changes
the audible siren sound. The vehicle horn ill not
sound.
3. In the right (A/H) position, the red LED on
the right is illuminated. Pressing the vehicle’s horn
ring ill sound the air horn tone. The vehicle horn
ill not sound.
4-4. AIR HORN/MANUAL SIREN SWITCH.
The AIR HORN/MANUAL s itch activates the
electronic air horn sound (up) in any selected
position, except RADIO, and the peak-and-hold
sound (do n) in the MAN position.
4- . TAP II FUNCTIONS.
Tap II allo s the driver to change the audible
siren sound via the vehicle’s horn ring. This feature
is especially effective for clearing traffic. The chart
belo demonstrates ho the horn ring can be used
to change the siren sound.
TAP II FUNCTIONS
Selector First Horn Second Horn
S itch Ring Tap Ring Tap
Position Produces Produces
Wail Yelp Wail
Yelp Priority Yelp
4-6. PRESS-AND-HOLD FUNCTION.
NOTE
For the press and hold functions to operate
ith the horn ring, the Control Head horn
ring s itch must be in the SIREN position.
Additional alternate sounds can be activated
hen the Selector s itch is set to MAN or PRTY.
While depressing and holding the horn ring and the
Selector s itch set to MAN, peak-and-hold siren
ill sound. In the PRTY position, the air horn ill
sound. Releasing the horn ring ill cause the siren
to revert back to the original function.

-10-
The TAP II functions can also be activated by
depressing the MANUAL SIREN s itch, as sho n
belo :
1st Tap 2nd Tap
Selector (MANUAL) (MANUAL)
WAIL Yelp Wail
YELP Priority Yelp
PRTY Air Horn Air Horn
NOTE
Peak-and-hold siren and air horn are the
“Press and Hold” features.
4-7. AUX IN FUNCTION.
If installed, set the selector to s itch to the
MAN position. Activate the installed auxiliary s itch
to sound the ail tone. To deactivate the ail tone,
move the selector s itch to the WAIL position and
back to the MAN position.
4-8. AUX OUT FUNCTION.
If installed, this function ill activate arning
lights any time ail, yelp, or priority is sounding.
4-9. SPEAKER DIAGNOSTIC TEST.
To test the speakers, set the selector s itch to
RAD. Press the AIR HORN/MANUAL paddle s itch
do n. Four rapid beeps should be heard and the
yello LEDs should flash four times. Note that the
yello LEDs ill illuminate hen a siren tone is
sounding.
4-10.PARK-SIREN DEACTIVATOR.
If installed, shifting the vehicle into PARK ill
silence the siren tones. Move the shift lever to an-
other position to sound the siren tone.
4-11.PA AND RADIO GAIN ADJUSTMENT.
The PA4000 comes from the factory ith the PA
and radio gain set to maximum. To decrease the gain
settings, proceed as follo s hile referring to figure
3-1.
1. Locate the PA and radio potentiometers on
the logic PC board near the RJ45 jack.
2. Using a small flat blade scre driver, rotate
the appropriate potentiometer to a desired volume
setting.

SECTION V
SERVICE AND MAINTENANCE
SAFETY MESSAGE TO PERSONNEL SERVICING
FEDERAL SIGNAL ELECTRONIC SIRENS
WARNING
The lives of people depend on your proper servic-
ing of Federal products. It is important to read
and follo all instructions shipped ith the
products. In addition, listed belo are some
other safety instructions and precautions you
should follo :
• Read and understand all instructions in this
manual before servicing the electronic siren
or speaker.
• To properly service an electronic siren or
speaker: you must have a good understanding
of automotive electrical procedures and systems,
along ith proficiency in the installation and
service of safety arning equipment. Al ays
refer to the vehicle's service manuals hen
performing service on a vehicle.
• Electronic circuit and speaker repairs must be
performed by a qualified and competent elec-
tronic technician.
• Your hearing and the hearing of others, in or
close to your emergency vehicle, could be dam-
aged by loud sounds. This can occur from short
exposures to very loud sounds, or from longer
exposures to moderately loud sounds. For
hearing conservation guidance, refer to federal,
state, or local recommendations.
OSHA Standard 1910.95 offers guidance on
“Permissible Noise Exposure.”
• All effective sirens and horns produce loud
sounds (120 dB) that may cause permanent
hearing loss. Al ays minimize your exposure
to siren sound and ear hearing protection.
Do not sound the siren indoors or in enclosed
areas here you and others ill be exposed to
the sound.
• DO NOT connect this system to the positive
terminal of the battery until servicing is com-
plete, and you have verified that there are no
short circuits to ground.
• In order for the electronic siren to function
properly, the ground connection must be made
to the NEGATIVE battery terminal.
• After repair, test the electronic siren and
speaker system to ensure that it is operating
properly.
• Federal Signal siren amplifiers and speakers
are designed to ork together as a system.
Combining a siren and speaker from different
manufacturers may reduce the arning effec-
tiveness of the siren system and may damage
the components. You should verify or test your
combination to make sure the system orks
together properly and meets both federal, state
and local standards or guidelines.
Failure to follo all safety precautions and
instructions may result in property damage, serious
injury, or death to you or others.
-1. GENERAL.
Most of the component electronic parts used in
the Model PA4000 are standard items that can be
obtained from any radio or electronics supply shop.
In order to reduce equipment do n-time, Federal
recommends that the entire Amplifier po er printed
circuit board (Part No.2001191A-01) or Amplifier
logic circuit board (Part No. 2001191A-02) be re-
placed. The printed circuit boards are relatively
inexpensive allo ing you to keep an adequate supply
in your repair shop.
The factory can and ill service your equipment
or assist you ith technical problems, should any
arise, that cannot be handled satisfactorily and
promptly locally.
Communications and shipments should be
addressed to:
Service Department
Federal Signal Corporation
2645 Federal Signal Drive
University Park, IL 60466
1-800-433-9132
(In Illinois) 1-708-534-3400
If any unit is returned for adjustment or repair,
it can be accepted only if e are notified by letter or
phone in advance of its arrival. Such notice should
clearly indicate the service requested and give all
pertinent information regarding the nature of mal-
function and, if possible, its cause.
-2. SIREN.
A. General.
Any competent electronic technician should
-11-

-12-
have little difficulty in tracing and correcting a
malfunction, should any occur. For emergency
replacement of any of the small components, care
must be used hen soldering. Heat easily impairs
transistors, capacitors and circuit boards. It is
therefore advisable to use longnose pliers or a similar
heat sink on the lead being soldered.
B. Removal for Servicing.
To remove the electronic assembly, located
inside the Amplifier chassis, for servicing; proceed as
follo s :
1. Remove the t o phillips head scre s
on the amplifier’s side hich secure the cover to the
Amplifier chassis.
2. Remove the cover by sliding it a ay
from the chassis.
C. Removal of Circuit Board.
The Amplifier logic circuit board (top circuit
board) is secured to the chassis by four Phillips head
scre s. Unplug the eleven-position connector, the
RJ45 connector, and the red and black connectors
before removing the scre s.
D. Replacement of Output Transistors.
Failure of one or both of the output transis-
tors (Q106, Q109) is usually the result of a defective
speaker (short circuited voice coil). Rebroadcast of
the unsquelched radio or music for long periods ill
also have a detrimental effect on the output transis-
tors, and is therefore not recommended.
Federal recommends that both output
transistors be replaced should only one device prove
to be defective. This practice ill insure long periods
of service bet een failures.
When installing ne output transistors,
insure that the Sil-Pad insulators are installed
bet een the heat sink and transistors.
CAUTION
Before reinstalling the repaired PA4000,
make certain that the speaker(s) is (are) not
defective.
WARNING
If ires are shorted to the vehicle frame or
each other, high current conductors can cause
hazardous sparks resulting in electrical fires
and molten metal.
Verify that no short circuits exist before
connecting to the Positive (+) battery termi-
nal.
DO NOT connect this system to the vehicle
battery until ALL other electrical connections
are made and mounting of all components is
complete.
Failure to observe this WARNING ill result
in fire, burns and blindness.
E. Testing.
WARNING
All effective sirens and horns produce loud
sounds (120 dB) that may cause permanent
hearing loss. Al ays minimize your exposure
to siren sound and ear hearing protection.
Do not sound the siren indoors or in enclosed
areas here you and others ill be exposed to
the sound.
After servicing is complete, perform a test
of all functions to ensure siren is operating properly.

-3. REPLACEMENT PARTS LIST.
Reference Description Part Number
Designation
Q106, Q109 Transistor, TIP35C, NPN, Po er 125B437B
F1 Fuse, 20A, 32V 148A142A
LP1, 2 Lamp, Panel 149A120
Insulator (Q106, Q109) 235A150A
Amplifier Po er Circuit Board, PA4000 2001191A-01
( ith parts installed)
Amplifier Po er Circuit Board, PA4000NY 2005002A-02
( ith parts installed)
Amplifier Logic Circuit Board 2005001B
( ith parts installed)
Control Head Circuit Board 2001190A
( ith parts installed)
Chassis 85361107A
Cover 85361103A
Amplifier Assembly, PA4000 85361108A
Amplifier Assembly, PA4000NY 85361108A-02
Control Assembly 85361106A
Accessory Kit 85361109A
Microphone 258B577A-02
Output Transformer 120258A
-13-

255292C
REV. C 405 Printed in U.S.A.