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SA-500-20 28 Volt Installation and Operating Instructions Page 3 of 8
CP4930B 05/07/05
GENERAL DESCRIPTION
The SA500 Siren Amplifier is a premium unit designed for single or dual 100W speaker use. The
primary operating modes are Yelp, Wail, Standby and Radio. A Noise Canceling PA Override and
push-button Horn Override are available in all modes except Radio. Another push-button is pro-
vided for push-on/push-off Phaser operation in the Yelp and Wail modes, and Manual siren con-
trol in the Standby mode. Auxiliary input is provided for connection to horn ring circuit or switch.
Latching siren cutout input is provided for connection to a door switch, etc. to stop siren tones
when exiting the vehicle. Radio and PA volume controls are provided on the front panel. The
front panel is backlit with LED's for night visibility. An internal 8-Position DIP switch allows selec-
tion of various options. This compact unit utilizes short circuit, high voltage, and reverse polarity
protection systems for maximum service life. Output indicator light on face for diagnostics.
SPECIFICATIONS
Input Voltage 18 - 32 VDC (negative ground)
Input Current 4 AMPS (@28 VDC - single 100W speaker)
8 AMPS (@28 VDC - dual 100W speakers)
Standby Current Less than 100 ma
Audio Frequency 200Hz - 10 kHz + 3db
Audio Distortion Less than 7% (@1 kHz - single 100W speaker)
Audio Output 40 watts (@28 VDC - single 100W speaker)
Audio Input 400 ohms + 10%
Output Power 105 WATTS RMS MAX. (30 VDC - single 100W speaker)
180 WATTS RMS MAX. (30 VDC - dual 100W speakers)
Siren Frequency 700Hz - 1500Hz (Two-Tone and Horn = 435 & 585Hz)
High Voltage Protection 32 - 36 VDC will cause siren output to cease, resume at normal
Short Circuit Current 50 AMPS (supply circuit must be capable of supplying this)
Operating Temp. -15° F to +140°F
Controls 4-position rotary mode switch (Yelp, Wail, Standby and Radio).
Momentary push-button Horn switch.
Momentary push-button Manual/Phaser toggle switch.
Front panel PA and Radio volume controls.
Auxiliary input connection programmable for positive or negative activation.
Cutout input connection programmable for positive or negative latching operation.
Internal 8-Position DIP switch option selector.
Connections (10-Pin Conn) (2) Positive, (2) Negative, (2) Speaker, (2) Radio, Cutout, Auxiliary
Size 6-1/8" Wide, 5-7/8" Deep, 2-1/8" High
Weight 4-1/2 LBS.
Tones/Cycle Rates Horn Wail Yelp Phaser Two-Tone
109 CPS 13 CPM 190 CPM 15 CPS 60 CPM
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 dam-
age 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.
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".
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)