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SECTION X - TWO-TONE SYSTEMS

          For Models 280K & 480K

REQUIRED EQUIPMENT

1. Control Unit - Any existing 280K or 480K

control unit can be used. No modifications or

additional switches are required.

2. Amplifiers - Two amplifiers, each housed in a

separate cabinet, are required.

3. Cables - A UMCO30T cable is needed for

interconnecting the two amplifiers. UMCO30K

(4’ or 15’ long) is needed for interconnecting

both amplifiers with the control unit.

4. Siren Speakers - At least one speaker must be

used with each amplifier. Two speakers may be

used as indicated by dotted lines in drawing.

Note: A speaker having one horn, but two driver

units (such as a 200 watt speaker), is electrically

the same as two speakers.

AMPLIFIER INSTALLATION

1. Install first amplifier as indicated in drawing.

2. Set slide switch on bottom of amplifier

chassis to match power rating of speakers

to be used.

3. Install amplifier with 4 inches maximum

between cabinets.

Page 11

PRELIMINARY CONNECTIONS

1. Interconnect AIR HORN wires from both 3 - pin

amplifier connectors using the appropriate

connector.

2. Intrusion Alarm - See Section VIII.

3. Connect one terminal (either one) of one siren

speaker to vehicle chassis (-). Connect same number

terminal of remaining speakers to vehicle chassis(-).

4. Of the two SIREN SPEAKER wires coming

from  the 12-pin control unit pigtail connector,

connect either one to vehicle chassis (-), and the

other to the speaker.

FINAL CONNECTIONS

a) see drawings.

1. The RED primary wire from the added amplifier

must connect directly to the positive (+) battery post

or to an appropriate power distribution terminal.

2. It is vitally important for proper siren operation

that a 12-ga (minimum) “jumper” be placed across the

RED primary wires of each amplifier as indicated.

Summary of Contents for Unitrol 280 Series

Page 1: ...AN 80K REV 14 FEB 03 80K AMPLIFIER Sirens Sirens with P A Sirens with P A and Switching INSTALLATION OPERATION FS UNITROL 1108 RAYMOND WAY ANAHEIM CA 92801 714 871 3336 Fax 714 871 3418 WWW UNITROL CO...

Page 2: ...ions Section VIII pg 9 P A Kit Installation Section IV pg 4 Model183K Standard Optional Features Section IV pg 5 Siren Warning Light Control Section IV pg 5 Rear Connections Section IV pg 5 Horn Ring...

Page 3: ...W OUTPROOFTRANSISTORPROTECTION 1 Output transistors blown out in normal sirens by failures of the siren speaker or its wiring are protected in the Unitrol 80K by automatic circuitry a Short circuited...

Page 4: ...hing Kawasaki wire colors with amplifier harness wires AIRHORN 1 12V applied to the amplifier s AIR HORN wire 3 pin power connector operates the air horn 12V can be supplied by a separate switch or th...

Page 5: ...o match horn button polarity Connect other side of switch to terminal 9 OptionalConnectionsorEquipmentcaninclude a AIR HORN See item 3 below b Microphone radio P A See Section V c Intrusion Alarm See...

Page 6: ...de by pressing the microphone button and talking Siren sounds are stopped until mic button is released INSTALLATION 1 Locate area for jack installation Allow 1 diameter clearance space for back portio...

Page 7: ...ition 1 2 3 turn on warning lights Position 3 turns on the siren and horn ring controls The toggle switch controls the siren s mode of operation during slide switch position 3 OFF No Siren MAN Allows...

Page 8: ...ontrols siren as follows During MAN Siren rises and falls only as horn ring is manually pressed and released During WAIL Horn ring activates 5 second Yelp During HI LO Horn ring activates 5 second Het...

Page 9: ...ntain blades audio connections will be established when radio cable is plugged into radio head 2 Radio Control If radio power control is desired locate the radio s transmit and receive control wires a...

Page 10: ...for warning lights SUGGESTEDCONNECTIONS 1 Since there are no uniform lighting arrangements there are no set rules for connecting wires Instructions appearing below are only suggestions You may prefer...

Page 11: ...is undesirable the positive output may be used to operate siren sounds or the air horn Page 9 c Connect one terminal either one of system on off switch to desired pin in amplifier 12 pin connector see...

Page 12: ...switch on bottom of amplifier chassis to match power rating of speakers to be used 3 Install amplifiers with 4 inches maximum between cabinets PRELIMINARYCONNECTIONS 1 Interconnect AIR HORN wires fro...

Page 13: ...g 2 Set slide switch on bottom of amplifier chassis to match power rating of speakers to be used 3 Install amplifier with 4 inches maximum between cabinets Page 11 PRELIMINARYCONNECTIONS 1 Interconnec...

Page 14: ...watts by vehicle voltage 13 volts nominal The result will be amperes 5 Motors Relays Most motors used in warning light bars draw 1 ampere or less Most relays draw 3 amperes or less 6 Keep in mind that...

Page 15: ...r on which unauthorized repairs or modifications have been made nor does it cover units that have been abused or used beyond limits stated in specifications FIVE YEARWARRANTY LIMITATIONS TECHNICAL SUP...

Page 16: ...longer exposures to moderately loud sounds For hearing conservation guidance refer to Federal State or local recommendations OSHA Standard 1910 95 offers guidance on Permissible Noise Exposure All ef...

Page 17: ...age rating In order for the electronic siren to function properly the ground connection must be made to a solid chassis component and not to an insulated point Page 15 Sound output will be severely re...

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