SC-550-10 Installation and Operating Instructions Page 3 of 12
CP4818B 05/07/05
GENERAL DESCRIPTION The SC-550 Remote Siren Amplifier with integrated Lighting Control is a premium unit designed
for single or dual 100W speaker use. A remote hand control is connected to the amplifier with a
thin cable. A 6-position rotary switch controls the primary operating modes of Phaser, Yelp, Wail,
Manual, Horn and Radio. A siren button and auxiliary siren input is provided for control of the
output tone, depending on the rotary switch setting. An integral microphone provides PA function.
The power switch is combined with the PA volume control. A hole is provided in the amplifier to
adjust Radio volume. A 4-position progressive slide switch controls primary lighting and may
automatically activate the siren. Non-progressive slide switch outputs provided for tailored light-
ing. Four auxiliary output pushbuttons provide for controlling additional lighting or other devices.
A latching siren cutout input is provided for connection to a door switch, etc. to disable the siren
when exiting the vehicle. An 8-position DIP switch on the amplifier allows selection of various
options: Two-Tone to replace Phaser, Phaser disable, Horn disable , short Manual, and Horn Ring
Cycler 2 (HRC2). Auxiliary siren and cutout input activation polarity along with disabling automatic
siren and slide switch reverse are additional options. The hand control is backlighted with LED's
for night visibility. The siren amplifier utilizes short circuit, high voltage, and reverse polarity pro-
tection systems for maximum service life over a wide temperature range. The slide switch and
auxiliary outputs are fused individually.
Siren Amplifier
Input Voltage 11 - 16 VDC (negative ground)
Input Current 8 AMPS (@14 VDC - single 100W speaker)
16 AMPS (@14 VDC - dual 100W speakers)
Standby Current Less than 200 ma
Audio Frequency 200Hz - 10 kHz + 3db
Audio Distortion Less than 3% (@1 kHz - single 100W speaker)
Audio Output 40 watts (@14 VDC - single 100W speaker)
Audio Input 400 ohms + 10%
Output Power 105 WATTS RMS MAX. (15 VDC - single 100W speaker)
180 WATTS RMS MAX. (15 VDC - dual 100W speakers)
Siren Frequency 700Hz - 1500Hz (Two-Tone and Horn = 435 & 585Hz)
Tones / Cycle Rates Horn Wail Yelp Phaser Two-Tone
Cycle Rates 109 CPS 13 CPM 190 CPM 15 CPS 60 CPM
High Voltage Prot. 16 - 18 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 6-position rotary mode switch (Phaser, Yelp, Wail, Manual, Horn and Radio).
Momentary push-button Siren swi tch.
PA volume with Power switch on Hand Control, Radio volume on Amplifier.
Auxiliary input connection programmable for positive or negative activation.
Cutout input connection programmable for positive or negative latching cutout opera-
tion.
Connections
(10-Pin Conn.)
(2) Negative, (2) Speaker, (2) Radio, Cutout, Auxiliary Siren, (2) non-progressive slide
switch outputs (500mA Max. per output)
Note: positive siren connection is through high current input
Light Controls
Voltage 11 - 16 VDC (negative ground)
Controls 4-position progressive slide switch with automatic siren activation
(4) auxiliary pushbuttons
High Current Input (2) pressure terminals, 140 AMPS Max. not including siren input current
Slide Switch Outputs (3) pressure terminals, 20 AMPS Max. per terminal
4 Auxiliary Outputs (4) pressure terminals, 20 AMPS Max. per terminal
General
Size Hand Control: 2-3/4" Wide, 1" Deep, 6" High
Amplifier: 7-1/2" Wide, 6-3/4" Deep, 2-1/8" High
Weight 5-1/2 LBS.