22-PDC305-00
Rev 03/05
Power Distribution Center
PDC-305
Installation Manual
FS UNITROL•1108 Raymond Way•Anaheim, CA. 92801•(714) 871-3336•(800) 854-3375
WWW.UNITROL.COM
LIMITED WARRANTY
FS UNITROL , a unit of Federal Signal Corporation, warrants each new product to be free from defects in
material and workmanship under normal use and service for a period of one year on parts replacements and
labor from the date of purchase.
During this warranty period, the obligation of UNITROL is limited to repairing or replacing, as UNITROL
may elect, any part or parts of such products which, after examination by Unitrol, is found to be defective in
material and/or workmanship.
UNITROL will warrant any unit that is delivered, prepaid, to the UNITROL factory or designated authorized
warranty service center for examination within the warranty period. If such examination reveals a defect in
material and/or workmanship, UNITROL will complete the necessary repairs under warranty.
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.
Warranty will not be extended to any unit that has been subjected to abuse, misuse, improper installation, or to
one that has been inadequately maintained. Warranty does not apply to units that have problems relating to
service or modification at any facility other than the UNITROL 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 UNITROL BE LIABLE FOR ANY LOSS OF PROFITS OR ANY
INDIRECT OR CONSEQUENTIAL DAMAGES ARISING OUT OF ANY SUCH DEFECT IN MATERIAL
OR WORKMANSHIP.
2
TABLE OF CONTENTS
Section
Title
Page
i
Warranty
2
ii
Table of Contents
3
I
General Description
4
II
Safety Message to Installers
5
III
Installation
6-7
IV
Safety Message for Service
8
V
Service
9
3
SECTION I
GENERAL INFORMATION
General:
Features:
The UNITROL PDC-305 module is
designed to distribute 250 amps of protected
power from the Battery, through an ignition
controlled 200amp solenoid to up to nine (9)
fuses or ATC style circuit breakers, (breakers
can be either automatic or manually
resetting). Three of the fuses can be hooked
up for direct battery power. Additionally,
there is a 50amp circuit breaker, which
derives power directly from the battery and
an additional 25amp circuit breaker, which is
powered from the ignition controlled
solenoid.
4

Economical, powerful, small and
compact.

5 _ by 5 _ inches (L x W)

Can be mounted virtually anywhere.

High reliability.

Cleans up vehicle wiring.

Activation switch protection from fly
back voltage spikes.
SECTION II
SAFETY MESSAGE TO INSTALLERS OF
FEDERAL SIGNAL LIGHT AND SOUND SYSTEMS
WARNING
The lives of people depend on your safe 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.
•
Install the speaker in a location which provides
maximum signaling effectiveness and minimizes the
sound reaching the vehicle’s occupants.
•
Never attempt to install aftermarket equipment which
connects to the vehicle wiring, without reviewing a
vehicle wiring diagram – available from the
manufacturer. Insure that your installation will not
affect vehicle operation or mandated safety functions or
circuits.
•
DO NOT install equipment, route wiring or cord in the
deployment path of an air bag.
•
Locate the siren so the vehicle controls 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.
•
If wiring is shorted to vehicle frame, high current
conductors can cause hazardous sparks resulting in
electrical fires or flying molten metal.
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.
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 and
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,
which may, in certain situations, cause permanent
hearing loss. You should minimize your exposure times
and wear suitable hearing protection.
After Installation
During Installation
•
After installation, test the electronic siren and speaker
system to ensure that it is operating properly.
•
Test all vehicle functions, including horn operation and
vehicle light systems, to ensure proper operation.
Ensure that installation has not affected vehicle
operation or changed any mandated 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.
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.
• Be sure the siren amplifier and speaker in your
installation have compatible wattage ratings.
•
•
•
In order for this electronic siren to function
properly, the ground connection must be made to
the NEGATIVE battery terminal.
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.
Failure to follow all safety precautions and instructions
may result in property damage, serious injury, or death to
you or others.
5
SECTION III
INSTALLATION
Figure 1
3-1 PHYSICAL INSTALLATION
3-2 ELECTRICAL CONNECTIONS
CAUTION
WARNING
Before drilling holes in ANY part of the vehicle,
be sure that both sides of the mounting surface
are clear of parts that could be damaged; such as
break lines, electrical wiring or other vital parts.
Failure to observe this WARNING may
result in fire, burns or blindness.
If shorted to vehicle frame, high current
conductors can cause hazardous sparks
resulting in electrical fires or molten metal.
A. Mounting
Mount the PDC-305 into the vehicle utilizing
the four (4) mounting holes in the base plate of
the unit.
DO NOT connect this system to vehicle
battery until ALL other electrical
connections are made and mounting of all
components is complete.
Verify that no short circuits exist before
connecting to the Positive (+) battery terminal.
6
SECTION III
INSTALLATION (continued)
S-1
S-2
CB1
CB2
200amp
Solenoid
W-1
T-1
T-2
W-2
T-3
T-4
T-5
T-6
T-7
T-8
T-9
3.3 Power connections
Terminals T-1, T-2 and T-3 can be switched to
ignition controlled simply by moving the RED
power wire from solenoid terminal S-1 to
Solenoid terminal S-2
Disconnect the battery from the vehicle.
Terminals T-1, T-2 and T-3 are powered directly
from the battery. Insert an appropriate rated fuse
or circuit breaker into the slot on the fuse block
1, directly above the screw terminal to be used.
3.4 Solenoid switch connections
Connect terminal G of the solenoid to vehicle
ground, i.e. battery ground. The solenoid will
not function without this connection.
Terminals T-4 through T-9 are powered through
the solenoid only after activation. Insert the
appropriate fuse or circuit breaker into the slot
on fuse block directly above the screw terminal
to be used.
Connect terminal I of the solenoid to an
ignition source or to the positive output of a
user supplied switch. This is the activation
switch for the solenoid.
Circuit Breaker 1, (labeled CB1), allows for an
output of 50 amps directly from the battery.
Connect the solenoid post labeled S-1 to the
positive side of the vehicle battery.
Circuit Breaker 2, (labeled CB2), allows for an
output of 25 amps after the solenoid has been
activated.
Reconnect the vehicle battery.
7
SECTION IV
SAFETY MESSAGE TO PERSONNEL SERVICING
FEDERAL SIGNAL ELECTRONIC EQUIPMENT
WARNING
The lives of people depend on your safe servicing
of 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.
To properly service 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.
Electronic circuit 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, which may
cause, in certain situations,
permanent hearing loss. You
should take appropriate safety
precautions such as wearing
hearing protection.
•
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.
Failure to follow all safety precautions
and instructions may result in property
damage, serious injury, or death to you
or others.
8
SECTION V
SERVICE
Trouble shooting assistance:
The Unitrol factory can and
will service your equipment or
assist you with technical
problems that cannot be handled
satisfactorily and promptly
locally.
1.Troubleshooting assistance is
readily available during normal
work hours by phoning our tollfee numbers. Outside California,
call 800-854-3375. Inside
California, call 714-871-3336.
Offices are open Monday
through Friday 7:00 AM to 3:30
PM, Pacific Coast Time.
If the unit is not working
properly, disconnect all electric
connections. Remove the unit
from the vehicle. Send the unit
to Unitrol‘s repair department.
2. Should it become necessary to
send the siren in for service
please include the following:
a) Your name
b) Company name
c) Phone number
d) A brief description of the
problem
e) Any special instructions
3. Send the siren unit to:
FS/Unitrol
ATTN: Service Dept.
1108 Raymond Way
Anaheim, CA 92801
9