Whelen Engineering Company ISP74 User manual

Page 1
©1997 Whelen Engineering Company Inc.
Form No.13221D (022502) For warranty information regarding this product, visit www.whelen.com/warranty
• Proper installation of this product requires the installer to have a good understanding of automotive electronics, systems and procedures.
• Whelen Engineering requires the use of waterproof butt splices and/or connectors if that connector could be exposed to moisture.
• Any holes, either created or utilized by this product, should be made both air- and watertight using a sealant recommended by your vehicle
manufacturer.
• Failure to use specified installation parts and/or hardware will void the product warranty.
• If mounting this product requires drilling holes, the installer MUST be sure that no vehicle components or other vital parts could be damaged
by the drilling process. Check both sides of the mounting surface before drilling begins. Also de-burr the holes and remove any metal shards
or remnants. Install grommets into all wire passage holes.
• If this manual states that this product may be mounted with suction cups, magnets, tape or Velcro®, clean the mounting surface with a 50/50
mix of isopropyl alcohol and water and dry thoroughly.
• Do not install this product or route any wires in the deployment area of your air bag. Equipment mounted or located in the air bag deployment
area will damage or reduce the effectiveness of the air bag, or become a projectile that could cause serious personal injury or death. Refer to
your vehicle owner’s manual for the air bag deployment area. The User/Installer assumes full responsibility to determine proper mounting
location, based on providing ultimate safety to all passengers inside the vehicle.
• For this product to operate at optimum efficiency, a good electrical connection to chassis ground must be made. The recommended
procedure requires the product ground wire to be connected directly to the NEGATIVE (-) battery post (this does not include products that use
cigar power cords).
• Do not attempt to activate or control this device in a hazardous driving situation.
• Use only soap and water to clean the outer lens. Use of other chemicals could result in premature lens cracking (crazing) and discoloration.
Lenses in this condition have significantly reduced effectiveness and should be replaced immediately. Inspect and operate this product
regularly to confirm its proper operation and mounting condition. Do not use a pressure washer to clean this product.
• It is recommended that these instructions be stored in a safe place and referred to when performing maintenance and/or reinstallation of this
product.
• FAILURE TO FOLLOW THESE SAFETY PRECAUTIONS AND INSTRUCTIONS COULD RESULT IN DAMAGE TO THE PRODUCT OR VEHICLE
AND/OR SERIOUS INJURY TO YOU AND YOUR PASSENGERS!
Automotive: Power Supplies
Warnings to Installers
Whelen’s emergency vehicle warning devices must be properly mounted and wired in order to be effective and safe. Read and follow all of Whelen’s written
instructions when installing or using this device. Emergency vehicles are often operated under high speed stressful conditions which must be accounted for
when installing all emergency warning devices. Controls should be placed within convenient reach of the operator so that they can operate the system without
taking their eyes off the roadway. Emergency warning devices can require high electrical voltages and/or currents. Properly protect and use caution around
live electrical connections.Grounding or shorting of electrical connections can cause high current arcing, which can cause personal injury and/or vehicle
damage, including fire. Many electronic devices used in emergency vehicles can create or be affected by electromagnetic interference. Therefore, after
installation of any electronic device it is necessary to test all electronic equipment simultaneously to insure that they operate free of interference from other
components within the vehicle. Never power emergency warning equipment from the same circuit or share the same grounding circuit with radio
communication equipment. All devices should be mounted in accordance with the manufacturer’s instructions and securely fastened to vehicle elements of
sufficient strength to withstand the forces applied to the device. Driver and/or passenger air bags (SRS) will affect the way equipment should be mounted. This
device should be mounted by permanent installation and within the zones specified by the vehicle manufacturer, if any. Any device mounted in the deployment
area of an air bag will damage or reduce the effectiveness of the air bag and may damage or dislodge the device. Installer must be sure that this device, its
mounting hardware and electrical supply wiring does not interfere with the air bag or the SRS wiring or sensors. Mounting the unit inside the vehicle by a
method other than permanent installation is not recommended as unit may become dislodged during swerving; sudden braking or collision. Failure to follow
instructions can result in personal injury. Whelen assumes no liability for any loss resulting from the use of this warning device. PROPER INSTALLATION
COMBINED WITH OPERATOR TRAINING IN THE PROPER USE OF EMERGENCY WARNING DEVICES IS ESSENTIAL TO INSURE THE SAFETY OF
EMERGENCY PERSONNEL AND THE PUBLIC.
Warnings to Users
Whelen’s emergency vehicle warning devices are intended to alert other operators and pedestrians to the presence and operation of emergency vehicles and
personnel. However, the use of this or any other Whelen emergency warning device does not guarantee that you will have the right-of-way or that other
drivers and pedestrians will properly heed an emergency warning signal. Never assume you have the right-of-way. It is your responsibility to proceed safely
before entering an intersection, driving against traffic, responding at a high rate of speed, or walking on or around traffic lanes. Emergency vehicle warning
devices should be tested on a daily basis to ensure that they operate properly. When in actual use, the operator must ensure that both visual and audible
warnings are not blocked by vehicle components (i.e.: open trunks or compartment doors), people, vehicles, or other obstructions. It is the user’s responsibility
to understand and obey all laws regarding emergency warning devices. The user should be familiar with all applicable laws and regulations prior to the use of
any emergency vehicle warning device. Whelen’s audible warning devices are designed to project sound in a forward direction away from the vehicle
occupants. However, because sustained periodic exposure to loud sounds can cause hearing loss, all audible warning devices should be installed and
operated in accordance with the standards established by the National Fire Protection Association.
Safety First
This document provides all the necessary information to allow your Whelen product to be properly and safely installed. Before beginning the installation and/or
operation of your new product, the installation technician and operator must read this manual completely. Important information is contained herein that could
prevent serious injury or damage.
WARNING: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer and birth defects or
other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Installation Guide:
ISP74 Intelligent Strobe Power Supply
51 Winthrop Road
Chester, Connecticut 06412-0684
Phone: [phone]
Internet: www.whelen.com
Sales e-mail: [e-mail]
Customer Service e-mail: [email protected]
®
ENGINEERING COMPANY INC.

Page 2
This ISP74 Intelligent Strobe Power Supply can be installed in
many different types of vehicles. The guidelines for the installation
of this product are written so that no matter what vehicle is being
used, the installation and operation of the ISP74 will be simple
and straight forward.
Section 1: Selecting a mounting location
A good choice for a mounting area would be a trunk or similar
compartment. However, due to the wide variety of vehicles onto
which the ISP74 can be installed, this is not always possible. The
following guidelines will help the installer select an acceptable
alternative:
• The ISP74 should be mounted on a metal surface to aid
heat dissipation. Be sure that this surface is not one that
either generates or is exposed to excessive heat during
normal operation of the vehicle.
• Do not select a location where the ISP74 will be exposed
to potential damage from any unsecured or loose
equipment in the vehicle.
• Be sure the area selected will not allow the ISP74 to be
exposed to water.
• When routing the ISP74’s wires, it is important to choose
a path that will keep the wires away from excessive heat
and from any vehicle equipment that could compromise
the integrity of the wires (ex. trunk lids, door jams, etc.).
• Be sure your mounting location does not block the
cooling fan in the rear of the unit. (Fig. 1)
• When the best mounting location has been determined,
securely fasten the ISP74 to it’s mounting surface using
the supplied hardware.
IMPORTANT! All customer supplied wires, that connect to
the positive (+) terminal of the battery, must be sized to
supply at least 125% of the maximum operating current, and
fused “at the battery” to carry the load.
WARNING! When extending the communication wires
(BLUE & GREY), use either the Whelen 25ft cable (P/N 46-
9641638-250) or similar “twisted pair” wires.
Caution:As it will be necessary to drill holes into the
mounting surface, the installer MUST be sure that no
vehicle components or other vital parts could be
damaged by the drilling process. Check both sides of
the mounting surface before drilling begins.
Section 2: Operating Instructions:
The ISP74 has been designed to emulate the operations of four
different types of power supplies:
Alternating Outlets. . . . . . . . . . . . . . . . . . . . . Alt. 2X2
Simultaneous Outlets (by pairs). . . . . . . .Simul. 2X2
Simultaneous Outlets . . . . . . . . . . . . . Simul. 2X1X1
S.C. (Serial Communication). . . . . . . . . . . . . Custom
Select the desired operational mode by configuring dip switches
1, 2 & 5, located on the front panel of the power supply. The use of
dip switches 3 & 4 is explained in the “Hi-Lo Power” section.
The following will explain how to place the ISP74 into each of
these respective modes, as well as outline the operational
procedures for each mode.
Emulation Modes
Mode 1: Alternating Outlets (default configuration)
Dip Switches
Dip Switch configuration for Alternating Outlet-mode:
Dip Switch 1 - OFF
Dip Switch 2 - OFF
Dip Switch 5 - OFF
Control Wires
In this configuration, applying +12VDC to the control wires (using
customer supplied switches) will have the following results:
Control Wire #1 = Outlets 1 & 2 enabled
Control Wire #2 = Outlets 3 & 4 enabled
Control Wire #3 = All Outlets enabled
Control Wire #4 = (See Section 3:Hi/Lo Power)
Flash Patterns: See Section 4.
Mode 2: Simultaneous Outlet Mode
Dip Switches
Dip Switch configuration for Simultaneous Outlet-mode:
Dip Switch 1 - ON
Dip Switch 2 - OFF
Dip Switch 5 - OFF
Control Wires
In this configuration, applying +12VDC to the control wires (using
customer supplied switches) will have the following results:
Control Wire #1 = Outlets 1 & 3 enabled
Control Wire #2 = Outlets 2 & 4 enabled
Control Wire #3 = All Outlets enabled
Control Wire #4 = See Section 3: Hi/Lo Power
Flash Patterns: See Section 4.

Page 3
Mode 3: Simultaneous Mode
Dip Switches
Dip switch configuration for Simultaneous -Mode:
Dip Switch 1 - OFF
Dip Switch 2 - ON
Dip Switch 5 - OFF
Control Wires
In this configuration, applying +12VDC to the control wires (using
customer supplied switches) will have the following results:
Control Wire #1 = Outlets 1 & 3 enabled
Control Wire #2 = Outlet 2 enabled
Control Wire #3 = Outlet 4 enabled
Control Wire #4 = See Section 3: Hi/Lo Power
Flash Patterns: See Section 4.
Mode 4: S.C. (Serial Communication) Mode
NOTE: When the ISP74 is configured for S.C. mode, it is
important to understand that the connections and operational
procedures used are quite different from any of the other modes.
In S.C. mode, Comet Flash is the only available pattern.
Dip Switches
S.C. emulation is accomplished by placing Dip Switch 5 in the ON
position. At this point, the remaining Dip Switches (1 thru 4) are
used to configure the address of the ISP74 for use in a S.C.
system. The addressing properties function as follows:
To Configure Address 1: To Configure Address 2:
Dip Switch 1 - ON Dip Switch 1 - OFF
Dip Switch 2 - OFF Dip Switch 2 - ON
Dip Switch 3 - OFF Dip Switch 3 - OFF
Dip Switch 4 - OFF Dip Switch 4 - OFF
To Configure Address 3: To Configure Address 4:
Dip Switch 1 - OFF Dip Switch 1 - OFF
Dip Switch 2 - OFF Dip Switch 2 - OFF
Dip Switch 3 - ON Dip Switch 3 - OFF
Dip Switch 4 - OFF Dip Switch 4 - ON
Control Wires
In this configuration, control wires 1, 2 , 3 & 4 are not used to
enable outlets or control Hi/Lo power activation, as with the
previous modes. Outlet control and Hi/Lo power activation is
handled by the S.C. Multi-Purpose Controller.
Section 3: Hi/Lo Power
Hi/Lo power activation and functionality can be configured in any
of 4 available modes, depending upon how Dip Switches 3 & 4
are positioned. Table 2 on Page 4 outlines each of the 4
configurations and their attributes. NOTE: In S.C. emulation
mode, Hi/Lo power activation is controlled with an S.C. Multi-
Purpose Controller.
Section 4: Flash Patterns
The ISP74 can generate up to 16 flash patterns by activating the 4
Pattern Control wires, either individually or in combination. NOTE:
in S.C. mode, Comet Flash is the only available pattern. Table 1
on page 4 outlines all of the available patterns and the wire
activations needed to produce them.
Section 5: Diagnostix™ (Optional)
The optional Diagnostix™ display allows the operator to confirm
proper operation of not only the 4 outlets on the ISP74, but of the
strobe light and strobe cable connected to these outlets as well.
Each LED indicator on the Diagnostix™ display, provides
diagnostic information for one outlet. For example; LED #1
monitors Outlet #1, etc. The LED’s appearance indicates the
condition of it’s corresponding outlet. Refer to Table 3 on Page 4.

Page 4
CONTROL SWITCHES (SUPPLIED BY CUSTOMER)
WHELEN
DIAGNOSTIC
INDICATOR
4
3
2
1
INDICATOR PANEL
TO DIAGNOSTIC
PATTERN 4
PATTERN 2
PATTERN 1
WHITE
BROWN
ORANGE PATTERN 3
GREY
BLUE
CTRL 3
DIP SWITCH
CONFIGURATION
COMM.
CONTROL
PATTERNS
POWER
1-CTRL 1
2-CTRL 2
3-CTRL 3
4-LO PWR 3&4
1&2 + BAT.
GROUND
ALTERNATING ALTERNATING
OUTLETS
12 3 4
RED
RED
BLACK
BLACK
VIOLET
YELLOW
GREEN
WHITE
RED
BLACK
TO DESIRED LIGHTHEAD
ASSEMBLY.
(TYP. 4 PLACES)
12V BATTERY
+12VGROUND
CTRL 1
CTRL 2
LO PWR
(SUPPLIED BY
3 AMP FUSE
CUSTOMER)
15 AMP FUSE
(SUPPLIED BY
CUSTOMER)
®
DIAGNOSTIC
12345 V-INPUT
I-IN @12.8V
FLASHRATE
JOULES HI
JOULES LO
OUTPUT POWER
OUTPUT PER OUTLET
UNIT SPECIFICATIONS
12.8VDC 20%
7 AMPS TYP.
ALT. 2X2
SIMUL. 2X2
SIMUL. 2X1X1
S.C.
6/2/2/2(TYP)
2/2/2/2(MIN)
70 WATTS (TYP)
17.5 WATTS (TYP)
±
150 FPM, COMET
140 FPM, COMET
140 FPM, COMET
150 FPM, COMET
25 ft. Communication Cable
(Twisted Pair)
P/N 46-9641638250
GREY
BLUE
FUSE
BLUE:
to RS485A
GREY:
to RS485B
TO
S.C.
Network
FLASH PATTERNS:
=+12VDC
TRIPLE FLASH
MICRO-BURST 3
MICRO-BURST 2
SEQUENTIAL
MODU-FLASH
RAPID RANDOM
DOUBLE FLASH
COMET FLASH*
* Only pattern available in
Serial Communication mode
4
3
2
1
K.A. COMET FLASH
K.A. DOUBLE FLASH
RAPID RANDOM
K.A. MODU-FLASH
K.A. SEQUENTIAL
KA MICRO-BURST 2
KA MICRO-BURST 3
Pattern Wire 1 = BROWN
Pattern Wire 2 = WHITE
Pattern Wire 3 = GREY
Pattern Wire 4 = ORANGE
K.A. TRIPLE FLASH
PATTERN
WIRE PATTERN TYPE
If the
LED is...
OFF
ON continuously
ON continuously
with a single flash
every few seconds
Flashing
rapidly
Either the outlet in question is not enabled, or the power supply is not turned on.
The outlet, strobe cable and strobe light in question are functioning properly.
Either the outlet, strobe cable and/or strobe light in question are malfunctioning.
In this condition, further investigation of the components is strongly recommended
The ISP74 is operating in Lo power mode.
then...
ISP74 Wiring Diagram
Hi/Lo Mode
Type
Latched
Level
Toggle
DISABLED
Momentary
Momentary
NONE
Single Pole/
Single Throw
Apply +12VDC to
VIOLET control wire
Apply +12VDC to
VIOLET control wire
Apply +12VDC to
VIOLET control wire
No Lo Power Operation
In This Mode
Turn all strobe outlets
off and then on.
Apply +12VDC to
VIOLET control wire
Not
Applicable
Remove +12VDC from
VIOLET control wire
OFF
ON
OFF
ON
OFF
OFF
ON
ON
Recommended
Switch type To Enable Lo Power Operation To Restore Hi Power Operation Dip Switch 3Dip Switch 4
Table 2
Table 1
Table 3