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SC-407-10 Ver. B Installation and Operating Instructions Page 3 of 12
CP4842C 05/07/05
GENERAL DESCRIPTION
The SC-407 Light Control/Siren is a premium unit designed for single or dual 100W speaker use
and lighting control. The primary siren 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. A push-button is provided for push-on/push-off Phaser operation in the Yelp and Wail
modes, and Manual siren control in the Standby mode. The Phaser function can be optionally
replaced by Two-Tone or disabled entirely with program jumpers. Another option allows cycling
through Wail, Yelp, and Phaser by pressing the horn ring when the function switch is in the
Standby position (Horn Ring Cycler 2). A latching siren cutout input is provided for connection to
a door switch, etc. to disable the siren when exiting the vehicle. Radio and PA volume controls
are provided on the front panel. The front panel is backlighted with LED's for night visibility. This
compact unit utilizes short circuit, high voltage, and reverse polarity protection systems for maxi-
mum service life.
The SC-407 provides a 4-position lever switch with LED indicators for primary lighting system
control of up to 60 amps total, and four illuminating rocker switches provide additional lighting
control with 20 amp per switch rating. The lever switch provides automatic Wail or Yelp siren
activation in position 3 (can be disabled). The light controls are directly connected via heavy lead
wires to assure high reliability.
SPECIFICATIONS
Siren Section
Input Voltage 9 - 16 VDC (negative ground)
Input Current 8 AMPS (@14 VDC - single 100W speaker)
16 AMPS (@14 VDC - dual 100W speakers)
Standby Current Less than 300 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 - 1450Hz (Two-Tone and Horn = 435 & 585Hz)
Tones / Cycle Rates Horn Wail Yelp Phaser Two-Tone
Cycle Rates 109 CPS 15 CPM 210 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 3-position siren mode rocker switch (Yelp, Standby and Wail).
3-position power mode rocker switch (On, Off and Radio).
Momentary push-button Horn switches.
Momentary push-button Manual/Phaser toggle switch.
Auxiliary input connection jumper-programmable for positive or negative Horn,
Manual/Phaser or Horn Ring Cycler 2 operation.
Cutout input connection jumper-programmable for positive or negative latching
cutout operation.
Connections (10-Pin
Conn.)
(2) Positive, (2) Negative, (2) Speaker, (2) Radio, Cutout, Auxiliary
Light Control Section
Voltage 9 - 16 VDC (negative ground)
Controls 4-position lever switch with position 3 siren activation and LED indicators
4 - illuminated on/off rocker switches
Current (Lever Switch) 30 AMPS per circuit, 60 AMPS total
Current (Rocker Sw.) 20 AMPS per switch
Connections
(8" Min. Leads)
Lever Switch - (1) #10 AWG input, (3) #14 AWG outputs
Rocker Switches - (1) #14 AWG input and (1) #14 AWG output per switch
EXTERNAL FUSING REQUIRED
Size 6-1/8" Wide, 5-7/8" Deep, 2-3/4" High
Weight 5-1/2 LBS.
General