Code 3 Motorcycle Sirens 3951, 3955 - Manual (Page 19)

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Introduction
The Model 3955 siren has been designed to meet the special needs of motorcycle applications. This siren
incorporates a rugged waterproof enclosure along with microprocessor based circuitry and MOSFET
technology.
Standard Features
The Model 3955 siren is a highly integrated siren amplifier designed to be operated via user supplied control
switches and common microphone interface. The following features are standard on Model 3959 sirens:
Siren Tones - Industry standard Wail and Yelp tones.
AIR HORN Tone - Electronic AIR HORN sound.
Instant-On- There is no " ON/OFF " switch. Selecting any siren function, or pressing the Push To Talk (PTT)
switch on the user supplied common microphone interface will activate the siren in the appropriate mode,
assuming the siren is connected to a source of +12V and the vehicle's ignition switch is on.
Wail - A continuous positive signal applied to this input from a user supplied switch will cause to siren to
activate in wail mode for as long as the switch remains in the on position.
Airhorn - A continuous positive signal applied to this input from a user supplied switch will cause to siren to
generate the Airhorn signal for as long as the switch remains in the on position.
Instant Public Address - Public Address override of all siren functions when the motorcycle Push-to-Talk (PTT)
key is pressed while the user supplied common microphone interface is set to PA mode.
Automatic Short Circuit Protection- The siren will sense a short circuit on the speaker terminals and
automatically go to standby until the fault is removed. Once the fault is removed the siren will return to normal
operation.
Sirens are an integral part of an effective audio/visual emergency warning system. However,
sirens are only short range secondary warning devices. The use of a siren does not insure
that all drivers can or will observe or react to an emergency warning signal, particularly at
long distances or when either vehicle is traveling at a high rate of speed. Sirens should only
be used in a combination with effective warning lights and never relied upon as a sole warning
signal. Never take the right of way for granted. It is your responsibility to be sure you can
proceed safely before entering an intersection, driving against traffic, or responding at a high
rate of speed.
The effectiveness of this warning device is highly dependent upon correct mounting and
wiring. Read and follow the manufacturer’s instructions before installing or using this device.
The vehicle operator should check the equipment daily to insure that all features of the device
operate correctly.
To be effective, sirens must produce high sound levels that potentially can inflict hearing
damage. Installers should be warned to wear hearing protection, clear bystanders from the
area and not to operate the siren indoors during testing. Vehicle operators and occupants
should assess their exposure to siren noise and determine what steps, such as consultation
with professionals or use of hearing protection should be implemented to protect their
hearing.
This equipment is intended for use by authorized personnel only. It is the user’s responsibil-
ity to understand and obey all laws regarding emergency warning devices. The user should
check all applicable city, state and federal laws and regulations.
Public Safety Equipment, Inc., assumes no liability for any loss resulting from the use of this
warning device.
Proper installation is vital to the performance of the siren and the safe operation of the
emergency vehicle. It is important to recognize that the operator of the emergency vehicle is
under psychological and physiological stress caused by the emergency situation. The siren
system should be installed in such a manner as to: A) Not reduce the acoustical perfor-
mance of the system, B) Limit as much as practical the noise level in the passenger com-
partment of the vehicle, C) Place the controls within convenient reach of the operator so that
he can operate the system without losing eye contact with the roadway.
Emergency warning devices often require high electrical voltages and/or currents. Properly
protect and use caution around live electrical connections. Grounding or shorting of electrical
connections can cause high current arcing, which can cause personal injury and/or severe
vehicle damage, including fire.
PROPER INSTALLATION COMBINED WITH OPERATOR TRAINING IN THE PROPER USE
OF EMERGENCY WARNING DEVICES IS ESSENTIAL TO INSURE THE SAFETY OF
EMERGENCY PERSONNEL AND THE PUBLIC.
WARNING!
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