PA300LM-CAN

Model PA300LM-CAN

ELECTRONIC SIREN

Price $4.00

INSTALLATION AND OPERATING INSTRUCTIONS

LIMITED WARRANTY

The Signal Division, Federal Signal Corporation (Federal), warrants each new product to be free from defects in material and workmanship, under normal use and service, for a period of two years on parts replacement and one year on labor from the date of delivery to the first user-purchaser.

During this warranty period, the obligation of Federal is limited to repairing or replacing, as Federal may elect, any part or parts of such product which after examination by Federal discloses to be defective in material and/or workmanship.

Federal will provide warranty for any unit which is delivered, transported prepaid, to the Federal factory or designated authorized warranty service center for examination and such examination reveals a defect in material and/or workmanship.

This warranty does not cover travel expenses, the cost of specialized equipment for gaining access to the product, or labor charges for removal and re-installation of the product. Lamps, flash tubes, or batteries are not covered under warranty.

This warranty does not extend to any unit which has been subjected to abuse, misuse, improper installation or which has been inadequately maintained, nor to units which have problems relating to service or modification at any facility other than the Federal factory or authorized warranty service centers.

THERE ARE NO OTHER WARRANTIES, EXPRESSED OR IMPLIED,

INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES

OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR

PURPOSE. IN NO EVENT SHALL FEDERAL BE LIABLE FOR ANY

LOSS OF PROFITS OR ANY INDIRECT OR CONSEQUENTIAL

DAMAGES ARISING OUT OF ANY SUCH DEFECT IN MATERIAL OR

WORKMANSHIP.

SECTION I

GENERAL DESCRIPTION

290A4127-01

Figure 1-1. Model PA300LM-CAN Electronic Siren.

The Federal Model PA300LM-CAN (figure 1-1) is a precision built, efficient and economical, fullfeatured electronic siren of advanced design. It provides wail, yelp and hi-lo siren tones, as well as the Tap II feature, public address (PA), radio rebroadcast and an air horn sound. An optional

MNCT-SB microphone is available for the PA function.

The siren may be installed in positive or negative ground vehicles with 12-volt electrical systems.

It is protected against failure modes (including reversed polarity) by a fuse that is replaceable without tools. No components protrude from the bottom of the siren to interfere with mounting arrangements.

The optional MNCT-SB microphone provides high quality voice reproduction without feedback

“squeal”. The microphone push-to-talk switch overrides any siren signal for instant PA use. PA and radio volume are adjustable by means of a front panel GAIN control. Radio inter-connect wires are built-in. No additional cables are required.

The Model PA300LM-CAN can drive one or two

11-ohm impedance, high power (100W) or low power

(58W) speakers. When two speakers are used, they must be connected in parallel and in phase.

The Tap II feature allows the driver to change the siren sound from wail to yelp (or vice-versa) via the vehicle’s horn ring. Tap II provides especially effective traffic clearing capability. In addition to Tap

II, additional alternate sounds can be activated in two other selector switch positions by depressing and holding the horn ring for as long as the alternate sound is desired. The charts in Section IV of this manual illustrate the operation of these features more fully.

Other special features of the Model

PA300LM-CAN include:

• High degree of reliability is achieved through the use of integrated circuits and silicon output transistors.

• Control panel is illuminated with non-glare lighting.

-1-

SECTION II

SPECIFICATIONS

Input Voltage ...............................................................

11VDC to 15VDC.

Polarity .........................................................................

Negative or positive ground.

Standby Current ..........................................................

120ma. max. (not incl. panel light).

Operating Temperature Range ...................................

-30

°

C to +65

°

C.

Operating Current (Wail mode) ..................................

10 amperes, max.

(11 ohm load, @ high power)

Frequency Range .........................................................

725 to 1600Hz.

Cycle Rate ....................................................................

Wail- 12 cycles/min.

Yelp- 180 cycles/min.

Hi-Lo- 60 cycles/min.

Voltage Output (approx.) .............................................

64V peak-to-peak.

Dimensions (HWD) ......................................................

2-1/2" (6.35cm) x 6-1/2" (16.51cm) x 8-1/2" (21.59cm).

Net Weight (incl. microphone) ....................................

4-1/2 lbs. (2.04kg).

Shipping Weight ..........................................................

6-1/2 lbs. (2.94kg).

NOTE

The following parameters were obtained with the radio input potentiometer and GAIN control set at maximum.

Audio Frequency Range ..............................................

300 to 10,000Hz.

Harmonic Audio Distortion (300-3,000Hz) .................

10% max. all power levels from 1/2 to 50 watts (frequency

response

±

3dB).

Input Impedance (Radio) .............................................

2000 ohms.

Input voltage required to obtain 20VRMS across

speaker load (Radio) ..................................................

0.55VRMS.

-2-

WARNING

The lives of people depend on your proper installation and servicing of Federal products. It is important to read and follow all instructions shipped with the products. In addition, listed below are some other important safety instructions and precautions you should follow:

Before Installation

Qualifications

• To properly install an electronic siren: you must have a good understanding of automotive electrical procedures and systems, along with proficiency in the installation and service of safety warning equipment. Always refer to the vehicle's service manuals when performing equipment installations on a vehicle.

Sound Hazards

• Your hearing and the hearing of others, in or close to your emergency vehicle, could be damaged by loud sounds. This can occur from short exposures to very loud sounds, or from 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 effective sirens and horns produce loud sounds (120 dB) that may cause permanent hearing loss. Always minimize your exposure to siren sound and wear hearing protection. Do not sound the siren indoors or in enclosed areas where you and others will be exposed to the sound.

• Federal Signal siren amplifiers and speakers are designed to work together as a system. Combining a siren and speaker from different manufacturers may reduce the warning effectiveness of the siren system and may damage the components. You should verify or test your combination to make sure the system works together properly and meets federal, state and local standards or guidelines.

During Installation

• DO NOT get metal shavings inside the product. Metal shavings in the product can cause the system to fail. If drilling must be done near the unit, place an ESD approved cover over the unit to prevent metal shavings from entering the unit. Inspect the unit after mounting to be sure there are no shavings present in or near the unit.

• DO NOT connect this system to the vehicle battery until

ALL other electrical connections are made, mounting of all components is complete, and you have verified that no shorts exist. If wiring is shorted to vehicle frame, high current conductors can cause hazardous sparks resulting in electrical fires or flying molten metal.

• Be sure the siren amplifier and speaker(s) in your installation have compatible wattage ratings.

• In order for the electronic siren to function properly, the ground connection must be made to the NEGATIVE battery terminal.

SECTION III

INSTALLATION

SAFETY MESSAGE TO INSTALLERS

OF

ELECTRONIC SIRENS

• Sound output will be severely reduced if any objects are in front of the speaker. If maximum sound output is required for your application, you should ensure that the front of the speaker is clear of any obstructions.

• Install the speaker(s) as far forward on the vehicle as possible, in a location which provides maximum signaling effectiveness and minimizes the sound reaching the vehicle’s occupants. Refer to the National

Institute of Justice guide 500-00 for further information.

• Mounting the speakers behind the grille will reduce the sound output and warning effectiveness of the siren system. Before mounting speakers behind the grille, make sure the vehicle operators are trained and understand that this type of installation is less effective for warning others.

• Sound propagation and warning effectiveness will be severely reduced if the speaker is not facing forward.

Carefully follow the installation instructions and always install the speaker with the projector facing forward.

• DO NOT install the speaker(s ) or route the speaker wires where they may interfere with the operation of air bag sensors.

• Installation of two speakers requires wiring speakers in phase.

• Never attempt to install aftermarket equipment, which connects to the vehicle wiring, without reviewing a vehicle wiring diagram - available from the vehicle manufacturer. Insure that your installation will not affect vehicle operation and safety functions or circuits.

Always check vehicle for proper operation after installation.

• DO NOT install equipment or route wiring or cord in the deployment path of an air bag.

• Locate the control head so the vehicle, controls, and microphone can be operated safely.

• When drilling into a vehicle structure, be sure that both sides of the surface are clear of anything that could be damaged.

After Installation

• After installation, test the siren system and light system to ensure that it is operating properly.

• Test all vehicle functions, including horn operation, vehicle safety functions and vehicle light systems, to ensure proper operation. Ensure that installation has not affected vehicle operation or changed any vehicle safety function or circuit.

• After testing is complete, provide a copy of these instructions to the instructional staff and all operating personnel.

• File these instructions in a safe place and refer to them when maintaining and/or reinstalling the product.

-3-

Failure to follow all safety precautions and instructions may result in property damage, serious injury, or death to you or others.

CAUTION

Damage to unit will occur if not properly fused. If a chassis mounted fuse is NOT installed, ensure that an in-line fuse (20A) and fuseholder are installed in the red control cable lead (P5, pin 6).

3-1. UNPACKING.

After unpacking the Model PA300LM-CAN, examine it for damage that may have occurred in transit. If the equipment has been damaged, file a claim immediately with the carrier stating the extent of damage. Carefully check all envelopes shipping labels and tags before removing or destroying them.

Before proceeding with installation, ensure that the following parts have been included in the carton.

Qty.

Description

1 Cable Assembly

2 Lockwasher, 1/4

2 Screw, 1/4-20 x 1/2

3-2. MOUNTING BRACKET.

WARNING

When installing equipment inside air bag equipped vehicles, the installer MUST ensure that the equipment is installed ONLY in areas recommended by the vehicle manufacturer.

Failure to observe this warning will reduce the effectiveness of the air bag, damage the air bag, or potentially damage or dislodge the equipment, causing serious injury or death to you or others.

The electronic siren comes equipped with a swinging bracket which enables it to be mounted in variety of positions. Positioning the bracket above the unit allows mounting to the underside of the dash.

Positioning the bracket below the unit will permit mounting on any horizontal surface.

The unit should be mounted in a position that is both comfortable and convenient to the operator.

Keep visibility and accessibility of controls in mind.

To install the unit under the dash, determine the mounting location and proceed as follows (see figure

3-1).

CAUTION

The unit must be installed in an adequately ventilated area. Never install near heater ducts.

MOUNTING UNDER DASH

1/4-20 HEX NUT

CAUTION

1/4-20 x 1/2"

HEX HD. CAP

SCREW WITH

LOCKWASHER

MUST BE USED

AS SHOWN

LONGER SCREW

WILL CAUSE

CIRCUITRY

DAMAGE.

1/4" SPLIT

LOCKWASHER

1/4-20 x 3/4" HEX

HD CAP SCREW

MOUNTING

BRACKET

1/4-20 x 1/2" HEX

HD. CAP SCREW

1/4" SPLIT

LOCKWASHER

HO

RN

Fe de ral S

MA

NU

AL

RA

DIO tio n ign al C orp ora

W

AI

YE

L

LP

HI

-LO

OF

F

GA

IN

SIR

EN

NOTE:

ONLY ONE BRACKET

IS SUPPLIED

1/4-20 x 1/2"

HEX HD. CAP

SCREW

1/4" SPLIT

LOCKWASHER

290A4127-02

Figure 3-1. Installation of PA300 Under Dash.

A.

Use the mounting bracket as a template and scribe two drill positioning marks at the selected mounting location under the dash.

CAUTION

Before drilling holes in ANY part of a vehicle, be sure that both sides of the mounting surface are clear of parts that could be damaged; such as brake lines, electrical wiring or other vital parts.

B.

Drill two 1/4-inch diameter holes at the position marks.

C.

Secure the mounting bracket to the dash with user-supplied 1/4-20 x 3/4 hex head screws, 1/4 split lockwashers and 1/4-20 hex nuts as shown in figure 3-1.

D.

Secure the electronic siren to the mounting bracket with 1/4-20 x 1/2 hex head screws and 1/4" split lockwashers as shown in figure 3-1.

CAUTION

To avoid damage to the unit, the 1/4-20 x 1/2 hex head cap screws and the 1/4 split lockwashers must be used as shown in figure 3-1.

E.

Tilt the unit to the desired position.

Tighten the 1/4-20 x 1/2 hex head screws.

-4-

3-3. POWER CABLE INSTALLATION.

CAUTION

Wiring changes have been made which requires the replacement of the old power cable, to achieve optimum siren performance. If this unit is used as a replacement in a two-speaker installation, you MUST remove the original power cable and install the new power cable

(supplied).

The power cable included in the carton is equipped with a twelve-prong plug (P5) that mates with the connector (J5) on the rear of the electronic siren (see figure 3-2). The various wires on the connector must be connected as follows:

A.

Speaker.

The unit is designed to operate with one 11ohm impedance speaker or two 11-ohm impedance, low power (58W) or high power (100W), speakers connected in parallel and in phase. On FEDERAL speakers, this can be accomplished by connecting the two speaker leads marked “1” to the SPEAKER

COMMON control cable lead and the two speaker leads marked “2” to the SPEAKER HIGH POWER or

SPEAKER LOW POWER control cable leads. See figure 3-3.

CAUTION

Damage to the unit will occur if speaker wires are improperly connected. NEVER CONNECT the brown SPEAKER HIGH POWER (100W) wire and orange SPEAKER LOW POWER

(58W) wire together to the speaker(s).

Using 18 gauge wire, connect the speaker leads (58W speakers to SPEAKER LOW POWER and

100W speakers to SPEAKER HIGH POWER) as

CAUTION

SYSTEM MUST BE FUSED WITH

20A IN LINE FUSE(SUPPLIED)

DO NOT EXCEED 2A MAX. ON

HORN RING CIRCUIT. SEE

INSTALLATION INSTRUCTIONS.

J5

Figure 3-2. Rear View of PA300.

290A4127-03

1

4

7

10

2

5

8

11

3

6

9

12

BLU

ORN

BRN

*

*

BLK (4-8)

GRN

RED (6-11)

WHT/YEL

WHT

BRN

SPEAKER, COMMON

SPEAKER, LOW POWER(58W)

SPEAKER, HIGH POWER(100W)

(NEG.) (-)

CHASSIS GROUND

(POS.) (+)

HORN RING

HORN

VEHICLE TWO-WAY

BRN

RADIO SPEAKER

*

NEVER CONNECT THE BROWN AND ORANGE SPEAKER

WIRES TOGETHER TO THE SPEAKER(S).

290A4127-04

Figure 3-3. Control Cable Wiring Diagram.

shown in the Control Cable Wiring Diagram, figure

3-3.

B.

Radio.

To allow incoming radio messages to be rebroadcast over the outside speakers, connect the two brown zip cord leads (P5, pins 9 and 12) across the two-way radio’s speaker.

C.

Horn Ring.

In order to utilize the Tap II and Press-and-

Hold features of the siren, the following procedure must be performed.

1.

Locate the wire that connects the vehicle horn ring switch to the horn or horn relay.

Cut this wire.

2.

See figure 3-4. Splice the white/yellow control cable wire (P5, pin 7) to the horn ring side of the wire that was cut in step 1. Insulate the splice with user-supplied wire nuts.

CAUTION

The horn ring transfer circuit of the siren is capable of switching a maximum of 2amperes. Some vehicles do not have a horn relay and, consequently, will draw more than 2-amperes when the vehicle horn is activated. Consult your vehicle service manual or a qualified mechanic to determine the current required to activate the horn. If it is less than 2-amperes, perform the procedure in step 3. If it is greater than

2-amperes, perform steps 4 through 10.

3.

Splice the white control cable wire (P5, pin 10) to the horn side of the cut wire. Insulate the splice with a user-supplied wire nut.

-5-

VEHICLE HORNS STEERING COLUMN

RELAY (USER SUPPLIED)

SW

TO BATTERY

CUT WIRE

WHT

TO HORN, OR HORN RELAY

CONTROL CABLE ASSEMBLY

WHT/YEL TO HORN SWITCH

290A4127-05

Figure 3-4. Horn Ring Connections.

4.

Obtain a SPST relay of sufficient contact current capacity to activate the vehicle horn.

Refer to figure 3-4 while performing the following steps.

5.

Mount the relay in a suitable location.

6.

Connect the horn side of the wire cut in step 1 to the relay contact terminal.

7.

Determine the “sense” of the vehicle’s horn ring activation circuit, i.e., does the horn circuit require a switched positive voltage or switched ground for activation.

8.

Connect the relay wiper terminal to the positive or negative potential determined in step

7.

9.

Connect the white control cable wire to one end of the relay coil.

10. Connect the other end of the relay coil to the opposite potential of that connected to the wiper in step 8.

D.

Connection to Power Source.

CAUTION

Damage to the unit will occur if not properly fused. Ensure that an in-line fuse (20A) and fuseholder are installed in the control cable leads (P5, pin 6) for negative ground, or (P5, pin 4) for positive ground, installations.

The PA300LM-CAN can operate from any

12-volt positive or negative ground vehicle electrical system. Therefore, before making any electrical connections, determine the polarity of the vehicle electrical system ground.

Power for the siren can be obtained from the vehicle’s power distribution center or directly from the vehicle battery. If power is going to be obtained directly from the vehicle battery, drill a hole in the vehicle firewall for the power lead to enter the engine compartment. Place a grommet or similar device in the hole to protect the wire against damage from rough edges.

CAUTION

Before drilling holes in ANY part of the vehicle, ensure that both sides of the surface are clear of parts that could be damaged; such as brake lines, fuel lines, electrical wiring or other vital parts.

If your vehicle has a negative ground electrical system, perform the procedure in paragraph 1. Perform the procedure in paragraph 2, if the vehicle has a positive ground system.

1.

Negative Ground.

a.

Connect the green (P5, pin 5) control cable lead to the vehicle chassis as close as practical to the siren. Scrape paint away from the selected bolt hole to ensure a good electrical connection to the chassis.

b.

Route the red (P5, pin 6) and the black (P5, pin 4) control cable leads, through the previously drilled hole, into the engine compartment.

Route the wires through existing clamps and holders toward the battery.

c.

To protect the red wire when connected to the battery terminal, use an in-line fuseholder and 20-ampere fuse (not supplied). The fuseholder should be installed as close as practical to the battery. If necessary, additional #14 gauge or heavier wire can be spliced to the red lead.

WARNING

If wires are shorted to the vehicle frame or each other, high current conductors can cause hazardous sparks resulting in electrical fires and molten metal.

Verify that no short circuits exist before connecting to the Positive (+) battery terminal.

DO NOT connect this system to the vehicle battery until ALL other electrical connections are made and mounting of all components is complete.

Failure to observe this WARNING will result in fire, burns and blindness.

d.

Connect the in-line fuseholder lead to the positive (+) battery terminal.

-6-

e.

Connect the black wire to the negative terminal of the battery.

2.

Positive Ground.

a.

Connect the green (P5, pin 5) control cable lead to the vehicle chassis as close as practical to the siren. Scrape paint away from the selected bolt hole to ensure a good electrical connection to the chassis.

b.

Route the black (P5, pin 4) and the red (P5, pin 6) control cable leads, through the previously drilled hole, into the engine compartment.

Route the wire through existing clamps and holders toward the battery.

c.

To protect the black wire when connected to the battery terminal, use an in-line fuseholder and 20-ampere fuse (not supplied). The fuseholder should be installed as close as practical to the battery. If necessary, additional #14 gauge or heavier wire can be spliced to the black lead.

WARNING

If wires are shorted to the vehicle frame or each other, high current conductors can cause hazardous sparks resulting in electrical fires and molten metal.

Verify that no short circuits exist before connecting to the Positive (+) battery terminal.

DO NOT connect this system to the vehicle battery until ALL other electrical connections are made and mounting of all components is complete.

Failure to observe this WARNING will result in fire, burns and blindness.

d.

Connect the in-line fuseholder lead to the negative (hot) battery terminal.

e.

Connect the red wire to the positive terminal of the battery.

3-4. AIR HORN PRESS-AND-HOLD

MODIFICATION.

The unit comes from the factory set so that the peak-and-hold sound will be heard when the Selector switch is set to MANUAL and the vehicle horn ring is activated. To change the sound to air horn, merely move jumpers JU1 and JU2 from the "PEAK" position on the P.C. board to the “AIR” position (see figure 3-5).

3-5. RELATIVE PA LOUDNESS ADJUSTMENT.

After the electronic siren is completely installed in the vehicle, set the Selector switch to MANUAL.

Depress the microphone push-to-talk switch, speak in a normal voice, and adjust the GAIN control for the desired sound level outside the vehicle. Turn-on the vehicle’s two-way radio and adjust the volume to a comfortable listening level inside the vehicle. Then set the Selector switch to RADIO. Stand outside of the vehicle and note the radio rebroadcast loudness.

If the sound volume is too loud or too soft, adjust R11 through the hole at the bottom of the siren (see figure

3-6) to the desired sound level.

After the adjustment is completed, the loudness of the radio rebroadcast and public address may be varied with the front panel GAIN control.

C1

R8

JU1

PEAK PEAK

JU2

R7

K1

CR5

C3

AIR

Q1

AIR

R18

R19

R20

R21

Q2

C9

Q3

R22

I C6

CR3

FRONT

I C1

C7

C2

CR4

C6

Figure 3-5. Press and Hold Modification.

290A4127-06

-7-

3-6. TESTING AFTER INSTALLATION.

WARNING

All effective sirens and horns produce loud sounds (120 dB) that may cause permanent hearing loss. Always minimize your exposure to siren sound and wear hearing protection.

Do not sound the siren indoors or in enclosed areas where you and others will be exposed to the sound.

After installation; test the electronic siren, including horn operation, to ensure that it is operating properly.

After testing is complete, provide a copy of this manual to all operating personnel.

R11

290A4127-07

Figure 3-6. Relative PA Loudness Adjustment.

-8-

SECTION IV

OPERATION

SAFETY MESSAGE TO OPERATORS OF

FEDERAL SIGNAL ELECTRONIC SIRENS

AND LIGHT/SOUND SYSTEMS

WARNING

The lives of people depend on your safe operation of Federal products. It is important to read and follow all instructions shipped with the products. In addition, listed below are some other important safety instructions and precautions you should follow:

• Frequently inspect the speaker to ensure that it is clear of any obstruction, such as mud or snow, which will reduce maximum sound output.

Qualifications

• To properly use an electronic siren and speaker(s): you must have a good understanding of general vehicle operation, a high proficiency in the use of safety warning equipment, and thorough knowledge of state and federal

UNIFORM TRAFFIC CODES.

Sound Hazards

• Your hearing and the hearing of others, in or close to your emergency vehicle, could be damaged by loud sounds. This can occur from short exposures to very loud sounds, or from 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 effective sirens and horns produce loud sounds (120 dB) that may cause permanent hearing loss. Always minimize your exposure to siren sound, roll up your windows and wear hearing protection. Do not sound the siren indoors or in enclosed areas where you and others will be exposed to the sound. Only use the siren for emergency response situations.

Signaling Limitations

• Be aware that the use of your visual and audible signaling devices does not give you the right to force your way through traffic. Your emergency lights, siren, and actions are

REQUESTING the right-of-way.

• Although your warning system is operating properly, it may not alert everyone. People may not hear, see, or heed your warning signal.

You must recognize this fact and continue driving cautiously.

• Situations may occur which obstruct your warning signal when natural or man-made objects are between your vehicle and others.

This can also occur when you raise your hood or trunk lid. If these situations occur, be especially careful.

Driving Limitations

• At the start of your shift, you should ensure that the light/sound system is securely attached to the vehicle and operating properly.

• If the unique combination of emergency vehicle equipment installed in your vehicle has resulted in the siren controls being installed in a position that does not allow you to operate them by touch only, OPERATE CONTROLS

ONLY WHILE YOUR VEHICLE IS STOPPED.

• If driving conditions require your full attention, you should avoid operating the siren controls while the vehicle is in motion.

Sound Limitations

• Before using the vehicle, check to see if the siren speakers are concealed from view. If the siren speaker is not in clear view on the front of the vehicle, use extra caution when operating the vehicle. A concealed siren speaker installation is less effective at warning others.

• Maximum sound output will be severely reduced if any objects are in front of the speaker.

If your installation has obstructions in front of the speaker, drive even more cautiously.

Continuing Education

• File these instructions in a safe place and refer to them periodically. Give a copy of these instructions to new recruits and trainees.

Failure to follow these safety precautions may result in property damage, serious injury, or death to you, to passengers, or to others.

-9-

4-1. GENERAL.

All controls utilized during normal operation of the Model PA300LM-CAN are located on the front panel (see figure 4-1).

The optional MNCT-SB plug-in microphone provides high quality voice reproduction in the public address mode. The microphone push-to-talk switch will override all siren functions, except radio rebroadcast, for instant PA use.

4-2. GAIN CONTROL.

The GAIN control is used to turn the siren on and off. Also, it is used to control the volume when the siren is used for public address or radio amplification. Clockwise rotation of the knob increases voice volume in the public address or radio amplification mode. The GAIN control does not control the volume of the siren signals.

The maximum clockwise setting of the control will be determined, in most cases by the point at which feedback or “squeal” occurs. This will depend upon the microphone gain, open windows, speaker placement, proximity of reflecting surfaces (building or other vehicles), etc. Adjust the GAIN control to a position just below the point at which feedback occurs or as desired.

4-3. SELECTOR SWITCH.

The Selector switch is a five-position rotary switch used to select the mode of operation. The following are positions on the Selector switch.

A.

RADIO.

In this position, incoming radio messages are amplified by the siren and rebroadcast over the outside speaker.

B.

MANUAL.

In this position, it is possible to operate the siren by activating the HORN/SIREN switch. The siren can also be activated by means of an auxiliary switch, such as the horn ring button (refer to paragraph 4-6).

FEDERAL SIGNAL CORPORATION

HORN

MANUAL

RADIO

WAIL

YELP

HI-LO

SIREN

SW3 SW2

Figure 4-1. Front View.

OFF

PA300

GAIN

R37

290A4127-08B

-10-

C.

WAIL.

In this position, the siren produces a continuous “wailing” sound, up and down in frequency.

D.

YELP.

In this position; a continuous, rapid “warbled” tone is generated.

E.

HI-LO.

In this position, a two-tone sound will be heard. This distinctive tone may be reserved for any special indication or situation.

4-4. HORN/SIREN SWITCH.

The HORN/SIREN switch, located on the left side of the front panel, activates the electronic air horn sound (up) or peak-and-hold sound (down) in any siren mode except radio.

4-5. TAP II FUNCTIONS.

Tap II allows the driver to change the siren sound via the vehicle’s horn ring. This feature is especially effective for clearing traffic. The chart below demonstrates how the horn ring can be used to change the siren sound:

TAP II FUNCTIONS

Selector

Switch

Position

First Horn

Ring Tap

Produces

Second Horn

Ring Tap

Produces

Wail

Yelp

Yelp

Wail

4-6. PRESS AND HOLD FUNCTIONS.

Wail

Yelp

Additional alternate sounds can be activated in two other Selector switch positions, by depressing and holding the horn ring for as long as the alternate sound is desired. The chart below shows these additional “Press and Hold” functions:

PRESS AND HOLD FUNCTIONS

Selector

Switch

Position

Hi-Lo

Manual

Press on

Horn Ring

Produces

Air Horn

Peak and

Hold or

Air Horn

Release of

Horn Ring

Produces

Hi-Lo

Coast down and silence or silence

SECTION V

SERVICE AND MAINTENANCE

SAFETY MESSAGE TO PERSONNEL SERVICING

FEDERAL SIGNAL ELECTRONIC SIRENS

WARNING

The lives of people depend on your proper servicing of Federal products. It is important to read and follow all instructions shipped with the products. In addition, listed below are some other safety instructions and precautions you should follow:

• Read and understand all instructions in this manual before servicing the electronic siren or speaker.

• To properly service an electronic siren or speaker: you must have a good understanding of automotive electrical procedures and systems, along with proficiency in the installation and service of safety warning equipment. Always refer to the vehicle's service manuals when performing service on a vehicle.

• Electronic circuit and speaker repairs must be performed by a qualified and competent electronic technician.

• Your hearing and the hearing of others, in or close to your emergency vehicle, could be damaged by loud sounds. This can occur from short exposures to very loud sounds, or from 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 effective sirens and horns produce loud sounds (120 dB) that may cause permanent hearing loss. Always minimize your exposure to siren sound and wear hearing protection.

Do not sound the siren indoors or in enclosed areas where you and others will be exposed to the sound.

• DO NOT connect this system to the positive terminal of the battery until servicing is complete, and you have verified that there are no short circuits to ground.

• In order for the electronic siren to function properly, the ground connection must be made to the NEGATIVE battery terminal.

• After repair, test the electronic siren and speaker system to ensure that it is operating properly.

• Federal Signal siren amplifiers and speakers are designed to work together as a system.

Combining a siren and speaker from different manufacturers may reduce the warning effectiveness of the siren system and may damage the components. You should verify or test your combination to make sure the system works together properly and meets both federal, state and local standards or guidelines.

Failure to follow all safety precautions and instructions may result in property damage, serious injury, or death to you or others.

5-1. GENERAL.

For warranty service, contact your local Distributor.

The factory can and will service your equipment or assist you with technical problems that cannot be handled satisfactorily and promptly locally.

Communications and shipments should be addressed to:

Service Department

Federal Signal Corporation

2645 Federal Signal Drive

University Park, IL 60466

1-800-433-9132

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5-2. REPLACEMENT PARTS LIST.

Reference

Designation

Q7, Q8

T2

F1

DS1

SW2

SW3

J5

Description

Transistor, But 70, NPN, Power

Transformer, Output

Fuse, 20A, 3AG, 32V

Lamp, 14V, #1893

Switch, Rotary

Switch, Paddle

Connector, 12-pin Molex (Chassis Mount)

Molex Pin, Male (Use with 139A152)

Microphone, Optional

Microphone Clip

Knob, GAIN control

Knob, Selector

Circuit Board (with parts installed)

Gain Control

Harness, Wiring

Installation Accessory Kit

Bracket, Mounting

Face Plate Logo

Face Plate

BLACK

RED

WHITE

J2 J3

FACE PLATE

PADDLE SWITCH

Part Number

125467

120C165-04

148A127

149A121

122B215

122358

139A152

233A129

MNCT-SB

85361082

141A102

141A111

2001220

106A116

175684-03

8537312

8536B022

8146B892-01

8146C893

OUTPUT TRANSISTOR

SELECTOR KNOB

OUTPUT TRANSFORMER

ROTARY SWITCH

GAIN CONTROL KNOB

J1 J4

FACE PLATE LOGO

GAIN CONTROL RED TERMINALS J1 BLACK TERMINALS J4

OUTPUT TRANSISTOR

J5

290A4127-09B

Figure 5-1. Internal View.

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255338D

REV. D 601 Printed in U.S.A.