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Carson Manufacturing Co., Inc.
5451 North Rural Street
Indianapolis, IN 46220
Phone: (888) 577-6877 Fax: (317) 254-2667
www.carsonsirens.com
TECHNICAL BULLETIN
HORN
RADIO
MAN
WAIL
SIREN
ELP
PHASER
POWER
OFF
ON
SA450
INSTALLATION AND
OPERATING MANUAL
SA-450-80 WITH PA VOLUME ON SIDE
(OLD VERSION)
SA-450-80 14V
SA-450-80 PG (Positive GND)
Carson is a trademark of Carson Manufacturing Company, Inc.
Sound Hazard - Sound level from siren speaker (>120dBA @ 10 feet) may cause hearing damage.
Do not operate siren without adequate hearing protection for you and anyone in immediate vicinity.
(Ref. OSHA 1910.95 for occupational noise exposure guidelines)
TB0328B Page 1 of 7 10/18/03
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SA-450-80 (old version) SPECIFICATIONS
INPUT POWER: 11-16 Volts DC, 8 Amps DC
SIREN MODE
OUTPUT POWER: 105 Watts RMS (15 VDC input, 100W speaker)
AUDIO MODE
OUTPUT POWER: 40 Watts RMS (14 VDC input, 100W speaker)
SIREN
FREQUENCY: 450Hz - 1500Hz Nominal
CYCLE RATES: WAIL - 14 cycles/min
YELP - 190 cycles/min
PHASER - 15 cycles/sec
AUDIO
RESPONSE: 200Hz - 10KHz +/-3db
Harmonic Distortion Less than 3% @ 1KHz
RADIO INPUT
SENSITIVITY: 0.75VAC Input Min. for 40 Watts RMS Output
OPERATING
TEMPERATURE: -15° F to +140° F
SIZE: 5-1/8" Wide X 2-3/8" High X 5-7/8" Deep
WEIGHT: 4 pounds
NIGHT VISIBILITY: Power light
PROTECTION: High Voltage – Siren output stops with input voltage above highest rating
Stops high output power from blowing speaker
Reverse Polarity - Fuse blows when power is wired backwards
Shorted Output – Fuse blows if speaker shorts (a common problem)
NOTICE
Due to continuous product improvements, we must reserve the right to change any specifications and information,
contained in this manual at any time without notice.
Carson Manufacturing Co., Inc. makes no warranty of any kind with regard to this manual, including, but not limited to,
the implied warranties of merchantability and fitness for a particular purpose.
Carson Manufacturing Co., Inc. shall not be liable for errors contained herein or for incidental or consequential
damages in connection with the furnishing, performance, or use of this manual.
TB0328B Page 2 of 7 10/18/03
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INSTALLATION
Proper installation of the unit is essential for years of safe, reliable operation. Please read all instruction before
installing the unit. Failure to follow these instructions can cause serious damage to the unit or vehicle and may void
warranties.
SAFETY PRECAUTIONS
For the safety of the installer, vehicle operator, passengers and the community please observe the following safety
precautions. Failure to follow all safety precautions and instructions may result in property damage, injury or
death.
Qualifications - The installer must have a firm knowledge of basic electricity, vehicle electrical systems and
emergency equipment.
Sound Hazard - Sound level from siren speaker (>120dBA @ 10 feet) may cause hearing damage.
Do not operate siren without adequate hearing protection for you and anyone in immediate vicinity.
(Ref. OSHA 1910.95 for occupational noise exposure guidelines)
Mounting - Mount the unit for easy access by the vehicle operator. DO NOT mount in air bag deployment area.
Assure clearances before drilling in vehicle. To prevent internal damage mounting bolts must not enter case more
than 1/4".
Wiring - Use wiring capable of handling the current required. Make sure all connections are tight. Route wiring to
prevent wear, overheating and interference with air bag deployment. Install and check all wiring before connection to
vehicle battery.
Testing - Test all siren functions after installation to assure proper operation. Test vehicle operation to assure no
damage to vehicle.
Keep These Instructions - Keep these instructions in the vehicle or other safe place for future reference. Advise the
vehicle operator of the location.
MOUNTING
The mounting bracket supplied can be installed above or below the unit. Choose a mounting location convenient to
the operator and away from any air bag deployment areas. Inspect behind mounting area for clearance. Assure
adequate ventilation to prevent overheating. Consider wire routing and access to connections, as well as microphone
bracket placement. Install mounting bracket to vehicle using 1/4" hardware (not supplied).
If mounting in a rack or console, make sure that mounting bolts do not enter case more than 1/4".
May need to set PA and RADIO VOLUME ADJUST on side of unit before final mounting and installation
A microphone clip along with mounting screws (CP3633) holds the microphone in place.
CP3676 Mounting Bracket
1/4-20 Bolt
(CP3966)
Bolt must not pass through
cover more than 1/4”
TB0328B Page 3 of 7 10/18/03
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j
A
A
A
ELECTRICAL CONNECTIONS
Disconnect vehicle battery before making any electrical connections.
Electrical connections to the amplifier are made using the wiring harness supplied. If the amplifier needs service the
connector can be easily removed without unwiring the harness. The power supply for the amplifier must be capable of
delivering peak currents up to 50 amps for adequate short circuit protection and reliable operation. The preferred
source is directly at the vehicle battery. A fuse on the unit protects from overload.
Wire Size and Termination - The diagram shows the minimum wire size used for each connection. If the wire is
longer than 10 ft. use the next larger wire size. Use only high quality crimp connectors for installation on the vehicle.
Negative Connection (Black) - Connect to negative battery connector or high current buss.
Positive Connection (Red) - Connect to positive battery connector or high current buss. A power relay may be used.
Speaker Connection (Brown) - Both leads must be used. Connect 1 lead to each terminal or lead of the speaker.
Optional Radio Input Connection (Blue) - Connect 1 lead to each terminal of the radio speaker or output connector.
The input is isolated and polarity is not important. May need to set RADIO VOLUME ADJUST inside the unit.
Optional Auxiliary Input Connection (White) - The Auxiliary Input allows an external source to activate the Siren
push button function. The diagram shows a horn ring connection example. Activated by positive or negative input.
NOTE: Permanent disconnection of the vehicle horn is NOT recommended.
+
-
#14 AWG RED
Extend with #12
#14 AWG BLK
Extend with #12
BAT
(2) #18 AWG BRN
RADIO
(2) #18 AWG BLU
Connect to output
ack, terminals or
speaker of radio
UX
#18 AWG WHT
IRING HARNESS CONNE C TIONS
WHITE TO AUX
CP3886
CABLE
Switch
HORN
RING
SWITCH
HORN RING
CONNECTION
dded
SPDT
UX
HORN
SIREN SWITCH
BLUE TO TWO
RED TO +VDC
BROWN
TO SPKR
WAY RADIO SPKR
BLACK TO -VDC
TB0328B Page 4 of 7 10/18/03
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OPERATION
Sound Hazard - Sound level from siren speaker (>120dBA @ 10 feet) may cause hearing damage.
Do not operate siren without adequate hearing protection for you and anyone in immediate vicinity.
(Ref. OSHA 1910.95 for occupational noise exposure guidelines)
HORN
RADIO
MAN
WAIL
ELP
PHASER
SIREN
POWER
OFF
ON
SA450
The OFF/ON Toggle Power Switch controls the siren power. The siren may be left on any time the vehicle is in
operation. The power should be turned off when vehicle is not being used to conserve battery power.
The Rotary Function Switch selects various operating modes. These modes are as follows:
RADIO - This mode reproduces, or repeats, the output of a radio. The radio must be connected and
HORN - Also considered a standby mode. Horn and PA Override available in this mode.
MAN - The siren tone is controlled Manually with SIREN button. PA Override available in this mode.
RADIO VOLUME ADJUSTed for this mode to function. No overrides available in this mode.
WAIL - The siren produces a normal rise-fall tone pattern. This mode should be used on highways or
areas with constant traffic flow. Yelp and PA Override available in this mode.
YELP - The siren produces a moderate warble tone. This mode should be used in lightly congested
areas. Horn and PA Override available in this mode.
PHASER - The siren produces a very fast warble tone. This mode should be used at intersections or in
highly congested areas. Horn and PA Override available in this mode.
OVERRIDE FUNCTIONS
PUBLIC ADDRESS
(PA) OVERRIDE - By pressing the microphone button any siren tone output is turned off, allowing the operator to
use the siren as a public address amplifier. The siren tone resumes when the button is
released. (Hold the microphone close to your lips for proper operation and set PA VOLUME
ADJUST)
HORN OVERRIDE - By pressing the SIREN button the siren tone output is replaced by the horn tone. The siren
tone resumes when the button is released. (This feature is not available in WAIL mode.)
YELP OVERRIDE - Available only in WAIL mode. By momentarily pressing the SIREN button the tone output is
switched to the Yelp tone. Pressing the button again switches the tone output back to Wail.
PA and RADIO VOLUME ADJUST
Access the PA and RADIO VOLUME ADJUST through a hole on the side of the unit.
The PA VOLUME ADJUST is a one time setting depending on the users voice.
Switch siren to HORN mode and turn on the power. While pressing the mic button
and speaking into the mic, set the PA VOLUME ADJUST for desired level.
The RADIO VOLUME ADJUST is a one time setting which depends on the radio
connected and its normal volume. Switch siren to RADIO mode and turn on the
power. With the volume on the radio itself set to normal level, set the RADIO
VOLUME ADJUST to the desired level.
RADIO VOLUME ADJUST
(PA VOLUME ADJUST OTHER SIDE)
TB0328B Page 5 of 7 10/18/03
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SERVICE
This unit is designed to provide years of reliable service under even the worst conditions. Many times there may
appear to be a problem with the unit when the true problem is in the speaker or improper installation. The following
chart shows typical symptoms and possible causes.
A blown internal fuse doesn't necessarily mean that the unit is bad. If a speaker or speaker lead is shorted this fuse
will blow before the unit is damaged. Disconnect the speaker leads and replace the fuse. If the siren emits a sound
when in the Yelp position it is OK. Check the speaker or leads for possible shorting.
Check or replace the internal fuse by removing the two screws holding the cover to the bottom of the case. The fuse
is a standard automotive type rated 15AMP.
PROBLEMS
Symptom Possible Cause Check
No Power or siren output Power switch not turned on
Bad Speaker
Connector or connections loose
Internal fuse blown
Loose connection at power source
No siren tone –
PA works
No PA PA volume not set properly
Distorted siren sound Speaker assembly loose
Intermittent siren tone High Voltage Protection
Horn or manual stuck on Siren switch stuck
No Radio Unit not connected to a radio
High Voltage Protection
Mic Button stuck
Function switch in Radio
Intermittent Aux Input connection
Low Vehicle voltage
Connector loose
Loose connection at power source
Mic Button activation
Circuit breaker in supply
connection
Aux Input improperly connected
Radio volume too low
Does Power LED come on?
Do you hear a “pop” when turned on?
With siren on, yelp selected, listen for tone in
amplifier.
Is an external fuse or circuit breaker used?
Are the power leads connected to a good buss?
The input voltage must be less than highest rating.
Does Mic Button release properly?
Try adjusting the internal PA volume control.
PA is not available in Radio position.
Is the speaker bell or tip loose?
Is the Aux Input used and wired properly?
The input voltage must be greater than lowest rating.
Is the vehicle voltage regulator working properly?
Is the connector tight on the back of the unit?
Check for loose leads back to power source.
Is something lying on the microphone?
Is a circuit breaker used with at least 50A rating?
Does the Siren pushbutton switch return fully when
released?
Is the Aux Input used and wired properly?
Is the radio connected properly to the unit?
Can you hear the radio in the vehicle?
Try adjusting the internal radio volume control.
RETURN
If you have any questions concerning this or any other Carson product, please contact our Technical Service
Department at (888) 577-6877. Many issues can be handled over the phone. We can also be reached via e-mail at
service@carsonsirens.com
If a product must be returned for any reason, please contact our Technical Service Department to obtain a Returned
Merchandise Authorization number (RMA#) before you ship the product to Carson. Please write the RMA# clearly on
the package near the mailing label. Be sure to provide a return address, contact and phone number, along with a brief
description of the problem.
TB0328B Page 6 of 7 10/18/03
Page 7
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PARTS
4
1
5
MAN
HORN
RADIO
WAIL
ELP
PHASER
SIREN
6
POWER
OFF
ON
3
7
SA450
2
8
Item Part # Description
CP3966 Bolt, mounting, 1/4-20 X 3/8 (2 required)
CP3676 Bracket, mounting
1 #8941 Button, red (C&K #894103000) (for pushbutton switch)
CP3886 Cable, wiring harness
2 640584-1 Connector, power (AMP #640584-1)
CP3675-1 Cover
3 CP4852 Knob, rotary function switch
4 CP3690 Label, front panel for SA-450-80 (some sirens had laser etched panel instead)
CP3691 Microphone (Replace with CP3570 microphone)
CP3633 Microphone clip with mounting screws
5 L111132MV02Q Switch, pushbutton siren (C&K # L111132MV02QA)
6 2FA53-73TABS Switch, toggle power (Carling Switch #2FA53-73/TABS)
7 CP3585 Switch, rotary function (top tabs folded and soldered)
8 CP4119 Transistor, output (2 required) (Industry standard TIP36C, Not Texas Instruments)
TB0328B Page 7 of 7 10/18/03
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