Federal Signal Siracom II Siren/Control System Product Manual

 SIGNAL DIVISION
Federal Signal Corporation
ODELS PA2050 & PA2100
SIRACOM Il
SIREN/CONTROL SYSTEM
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INSTALLATION AND SERVICE INSTRUCTIONS
PRICE $2.00
NOTE
This service manual describes the PA2100. However,
the PA2050 and PA2100 are identical except the PA2050
does not have provision for accommodating the option-
al lighted pushbutton switches. Therefore, all descrip-
tions, specifications, and service data apply equally to
both models.
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Federal Signal Corporation will be sole judge of what constitutes defec- y
tive material and workmanship.
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у The Federal Signal Corporation warrants each of its new electronic к
3 sirens to be free from defective material and workmanship for a period of : —
‘ one year from date of purchase. Federal Signal Corporation will remedy p>
у any defect which under normal installation and operation discloses such =>
у defect; provided the unit is delivered, transportation prepaid by owner, =
y to our factory for examination and such examination reveals that in our ==
‘ judgment a defect in material and/or workmanship exists. In all cases, >=
OY
Defects of workmanship and material under this warranty will be
corrected at no cost to you for labor and material.
This warranty does not extend to any electronic siren which has
been subjected to abuse, misuse; improper installation or violation of any
instructions supplied by us, nor extended to units which have been ser-
viced or modified at any facility other than our factory.
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This warranty takes precedence over all other warranties expressed
or implied and no representative or other person is authorized to assume
for Federal Signal Corporation any other liability in connection with the
sale of our electronic sirens.
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SECTION I
GENERAL DESCRIPTION
29047032
Figure 1-1. Model PA2100 Siren/Control System.
1-1. GENERAL.
The Federal Model PA 2100 SIRACOM
П (figure 1-1) is a precision-built, com-
pact Siren/Control System of advanced de-
sign. It consists of a Siren Module and a
Control Module.
The PA 2100 is designed to operate
from a nominal 12 volt DC, negative ground
electrical system. The speaker terminals,
on the rear panel of the unit, in conjunction
with a slide switch on the rear of the siren
module inside of the housing, allow the use
of either 100 watt or 58 watt speakers.
The Siren Module produces three dis-
tinct sounds. This module also has provi-
sions for public address (PA), amplification
of radio messages (radio rebroadcast), and
manual siren operation,
If it is desired to make use of the pro-
visions for PA and radio rebroadcast, a
Federal Model MNCT Microphone or the
vehicle's two-way radio microphone and
the appropriate adapter module are re-
quired. The Model MNCT Microphone and
a line of adapter modules to fit most popular
makes of two-way radio microphones are
available as options from Federal. The
adapter modules include the wiring required
to interconnect the PA 2100 with the micro-
phone and the two-way radio.
The Siren Module can be easily re-
moved from the vehicle without disturbing
the wiring to the control switches and with-
out disabling the vehicle accessories (horn,
lights, radio, gun lock, etc.).
The Control Module contains all of
the circuitry and devices necessary to con-
trol the entire vehicle warning light system
and accessories. The Control Module also
routes power to the Siren Module.
An external 50 ampere, automatic re-
set circuit breaker is supplied to protect the
vehicle warning light system.
A panel light and a pilot light are illumi-
nated whenever the vehicle ignition switch is
on.
1-2. SIREN MODULE.
Most of the solid state electronic cir-
cuitry in the Siren Module is mounted on
printed circuit boards. This circuitry pro-
vides a high level of performance and relia-
bility over a wide range of environmental
conditions. The circuitry incorporates feed-
back that maintains high audio quality for
the PA and radio rebroadcast functions. The
electronic circuitry in the Siren Module is
protected by a 20 ampere fuse.
The Siren Module produces three dis-
tinct siren sounds; WAIL, YELP, and
HI-LO. In addition, it also has provisions
for public address (PA) and radio rebroad-
cast. A LED indicator illuminates when the
SELECTOR is set to RADIO (radio rebroad-
cast). A manual SIREN pushbutton switch is
included for control of the Manual Wail sig-
nal.
The siren can also be operated by an
auxiliary switch such as the vehicle horn
switch or a foot switch. The unit can still
be operated manually by depressing the
SIREN button if an auxiliary switch is in-
stalled.
The TAP II Instant Yelp feature provides
'hush-on"', "push-off" operation when the
auxiliary switch is operated while the
MASTER switch is in position 3 and the
SELECTOR switch is in the WAIL, YELP
or HI-LO positions.
The PA 2100 can be used with a Model
MNCT microphone or in common with the
microphone included with the two-way radio
installed in the vehicle. The Model MNCT
microphone is a transistorized, noise can-
celling microphone that has the character-
istics necessary to drive the audio ampli -
fier in the PA 2100. A Model FN900
Adapter Module is required when the MNCT
Microphone is used with the PA 2100.
In common microphone operation, an
optional adapter module connects the siren
directly to the two-way radio. The common
microphone is electrically connected to the
two-way radio in all SELECTOR switch po-
sitions except PA. When the SELECTOR
switch is set to PA, the microphone is con-
nected to the siren amplifier so that mes-
sages can be announced over the siren
speaker system.
1-3. CONTROL MODULE.
A. General
The Control Module is designed
to be used as a central connection and con-
trol location for all vehicle emergency warn-
ing devices along with the distribution of
power and control of other emergency and
safety devices normally found in an emer-
gency vehicle.
B. MASTER Switch
The four position MASTER rotary
switch is used to control the emergency warn-
ing light system andthe siren. Any com-
bination of lights can be controlled by the
MASTER switch. For example, position 1
can be used to operate the vehicle's flashing
lights; position 2 can control the rotating
lights and the siren is controlled by posi-
tion 3. (Position 3 also transfers the horn
ring circuit from the horn to the siren). Po-
sition 0 is the "off" position.
A maximum of three switched
circuits can be controlled by any given posi-
tion of the MASTER switch. The actual de-
vices controlled by a given position of the
MASTER switch can be programmed by
means of a nine section miniature rocker
switch inside of the Control Module. The
switched circuits can be reprogrammed
if requirements change.
C. Accessory Control Switches
(PA 2100 Only)
A maximum of four optional, lighted,
pushbutton type switches can be provided by
Federal for installation on the front panel of
the Control Module. These switches can be
used for controlling vehicle accessories
such as the spotlight, gunlock, brake lights,
trunk lid, etc. These switches are available
in two types. The switch types and their
typical applications are shown in Chart 1-1.
MODEL TYPE / CONTACT ARRANGEMENT TYPICAL APPLICATION
DPDT, PUSH-PUSH, ISAMP, LIGHTED RED AUXILIARY LIGHTS
Бе A а ALLEY LIGHTS
AS | 72 69 o 3 B E LIGHT
ca 3 70 2 ‚ о— 4 OR
aso 5 BACK -UP LIGHT
17-——e CUT-OFF
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DPST, MOMENTARY, ISAMP, LIGHTED RED
GUN LOCKS
= | | — {| — 8 TRUNK LOCK
AS? =e у 2 : 4 MECHANICAL. SIREN
ras ga 7 — — —о^' о Б BRAKE
NOTE: THE MODEL CLK ACCESSORY KIT IS ALSO AVAILABLE. THIS LENS KIT
CONTAINS ONE EACH OF THE FOLLOWING! RED, YELLOW, GREEN, AND BLUE
LENSES. THE STANDARD RED LENS PROVIDED WITH EACH SWITCH 1S
,. FACETED, WHEREAS ALL LENSES IN THE KIT ARE TRANSLUCENT.
Chart 1-1.
D. Terminal Positions
Most of the electrical connections
to the PA 2100 are made by means of 16
screw terminals. As indicated in figure
1 - 2, all terminal positions on the rear
panel of the Control Module are clearly
labeled on a legend plate. The function and
current capacity of each terminal are listed
in Chart 1-2,
E. Flasher Option
can also be used as a single light flasher.
The flash or alternating rate is approxi-
An optional internal alternating mately 90 flashes or alternations per
flasher is available for use with the PA minute. The flash or alternating rate is
2100. This flasher is capable of switching independent of the voltage, load, and temper-
a maximum of 12 amperes. The flasher ature.
Figure 1-2. Model PA2100 Rear View.
Terminal Function Current Capacity
FLA IN Flasher input 12A
FLA OUT (2) Flasher output 12A
RING Vehicle horn ring 2A
HORN Vehicle horn 2A
A Flasher Off override -
B Flasher On override _
C Not connected -
1 MASTER Circuit 1 30A
2 MASTER Circuit 2 30A
3 MASTER Circuit 3 30A
4 Not connected -
IGN Ignition switch connection 10, 5A
RC Radio Control (for radio rebroadcast) 10A
SPKR Speaker Terminals —
Chart 1-2.
SECTION II
SPECIFICATIONS
2-1. GENERAL.
Input Voltage . e. e e + + e e + « » 10VDC to 16VDC (16VDC opera-
tion limited to 15 min.)
Polarity. . e e. e el se e + e e e 0 Negative ground only
Standby Current (MASTER . e. e e e e + 0 mA. (not including panel lamp)
switch set to position 0)
Operating Temperature Range . . e . . e -309C to +65°C
Dimensions (HWD - excluding . . e. . . . 2-3/8" x 7-7/8" x 8"
heat sink, knob and rear trim) (6cm x 20cm x 20.3cm)
Weight (approx.) . e. e e e e + + + e 10 Ib. (4. 5kg.)
2-2. SIREN.
Operating Current (14. 0VDC - WAIL)
1 low Power Speaker . . e. e + +. + 5 amperes
2 Low Power Speakers or
1 High Power Speaker
2 High Power Speakers . .
Frequency Range . . . e. e.
Cycle Rate Ld . + . > » .
Voltage Output (approx.)
1 Low Power Speaker. . .
2 Low Power Speakers . .
1 High Power Speaker +
2 High Power Speakers . .
2-3. AUDIO.
10 amperes
15 amperes
550 to 1500Hz
WAIL - 10 cycles/min.
YELP - 180 cycles/min.
HI-LO - 50 cycles/min.
45V P-P
40V P-P
64V P-P
60V P-P
14. 0VDC supply voltage. Radio potenti-
ometer and GAIN control at maximum
Frequency Range . . e e. o
Harmonic Distortion . . . e
Input Impedance . +. e e .
Signal input voltage required to
obtain 20 Vrms across a 5.5
ohm load
300 to 10,000Hz
10% max. at all power levels
from .5 to 70 watts (frequency
response +3dB)
Radio - 3.6K ohms
Carbon Mic. ~ 3.6K ohms
Magnetic Mic. - 10K ohms
Radio - 0.45 Vrms
Carbon Mic. - 0.165 Vrms
Magnetic Mic. - 0.025 Vrms
Model MNCT
Model FN900
Model FN901
Model FN902
Model FN903
Model FN904
Model FN905
Model FN906
Model FN907
Model FN908
Model FN909
Model FN910
Model FN 911
Model FN 912
Model FN913
3-1. UNPACKING.
2-4. ACCESSORIES (OPTIONAL).
Transistorized Noise Cancelling Microphone
Federal Model MNCT Microphone Adapter Module
Federal Model MNC or MR Microphone Adapter Module
Federal Model VPII Microphone Adapter Module
Motorola Microphone Adapter Module
Motorola Micor Microphone Adapter Module
RCA Microphone Adapter Module
RCA 500 Microphone Adapter Module
GE Microphone Adapter Module
GE Master II Microphone Adapter Module
GE TPL Microphone Adapter Module
Federal Duty Patrol Microphone Adapter Module
Aerotron MPAC 6,7 or 8. Adapter Module
RF Communications Model RF-498 Adapter Module
Motorola "Converta-Com" Microphone Adapter Module
SECTION II
INSTALLATION
3-3. CONTROL MODULE ACCESSORY
After unpacking the Model PA 2100,
examine it for damage that may have occur-
red in transit. If the equipment has been
damaged, file a claim immediately with the
carrier stating the extent of the-damage.
Carefully check all envelopes, shipping
labels and tags before removing or destroy-
ing them. If an adapter module was ordered,
it is packed in a separate carton,
3-2. GENERAL.
Before connecting any wires to the
PA 2100 install all revolving and flashing
lights, gunlocks, trunk locks and other de-
vices that will be controlled by the PA 2100.
Route all wiring to the mounting location of
the PA 2100, allowing 8 to 12 inches of
extra wire at the siren location. Install the
vehicle speakers and route the speaker
leads (AWG 18 wire) to the siren location.
Run leads to the vehicle's horn ring circuit.
Install the 50 ampere circuit breaker pro-
vided between the battery and the firewall,
and as close to the battery as practical. In-
stall leads between the battery and the cir-
cuit breaker and the siren location using
wire no smaller than AWG 10. Install the
wiring between the ignition switch and the
siren installation site. If desired, all
leads at the PA 2100 may be terminated
with crimp-on spade connectors.
SWITCHES. (PA 2100 Only)
A. General.
The PA 2100 Control Module is de-
signed to accommodate up to four optional
customer installed pushbutton switches.
These switches are used to control various
vehicle mounted devices. There are two
types of switches available. Switches that
meet the customer's requirements are
selected at the placement of the order.
Switch types, their descriptions, and typical
applications are listed in Chart 1-1.
B. Installation.
If no accessory switches are to be
installed in the front panel of the Control
Module, disregard the procedure that follows:
CAUTION
Do not change any factory
wiring in the PA 2100 when
the optional accessory switches
are being installed. Any change
in the existing wiring may over-
load the circuitry and damage
the unit.
1. In order to wire the accessory
switches, it is necessary to remove the top
cover from the chassis. To remove the
cover, loosen the two hex head captive
screws on the bottom of the unit and slide
the cover off.
2. Remove one hole plug for each
switch to be installed on the front panel of
the Control Module. Push the plugs out
from the inside of the unit.
3. Install the switches by inserting
them into the desired holes in the front pan-
el in accordance with the instructions pro-
vided with the switches. Press the switches
into the front panel until they snap in place.
4. Pass all wiring to the accessory
switches through the 1' hole in the rear
panel of the Control Module. Refer to Chart
1-1 for information concerning the wiring
of the switches. The wiring to each switch
is determined by the device that the switch
controls. Follow the installation instruc-
tions included with the devices and ensure
that the device is properly fused.
3-4. BRACKET MOUNTING.
The siren is shipped with a swing-
ing mounting bracket that makes it possible
to mount the unit in a variety of positions.
Positioning the bracket above the unit allows
mounting on the underside of the dash.
Positioning the bracket below the unit per-
mits mounting on any horizontal surface or,
in conjunction with Federal's TU70 Tunnel
Mount, on the vehicle's transmission hump.
Mount the siren in a location that is con-
venient and comfortable to the operator and
where it will not interfere with the safe
operation of the vehicle. Keep visibility and
accessibility of controls in mind when choos-
ing a mounting location. To install the
bracket 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 the siren near
heater ducts.
A. Use the mounting bracket as a tem-
plate and scribe two drill positioning marks
at the selected mounting location under the
dash.
B. Drill two 1/4-inch diameter holes
at the position marks.
С. Secure the mounting bracket to
the dash using two each of the following:
1/4 - 20 x 3/4 hex head screws, 1/4" split
lockwashers and 1/4 - 20 nuts as shown in
figure 3-1.
D. Set the siren on the floor of
the vehicle as close as possible to its final
mounting location. DO NOT secure the
PA 2100 to the mounting bracket at this time.
1/4 SPLIT LOCKWASHER
MOUNTING UNDER DASH
1/4-20 HEX NUT Ga
y
A
1/4-20 X 3/4 HEX HD. CAP SCREW
1/4-20X 3/8 HEX HD, CAP SCREW
1/4 SPLIT -
EFO AO
Installation of Siren Under the Dash.
6-
Figure 3-1.
When installing the PA 2100 on the
transmission hump, a Federal Model TU70
Tunnel Mount is recommended. The TU70
is drilled and tapped to accept the PA 2100
mounting bracket. Follow the installation
instructions packed with each unit.
3-5. POWER CONNECTIONS.
NOTE
The PA 2100 can be installed only
in vehicles that have a negative
ground electrical system.
A. Install the 50 ampere circuit break-
er provided in the vehicle engine compart-
ment. Mount the circuit breaker as close as
practical to the battery.
B. Connect the red power lead of the
PA 2100 to one side of the circuit breaker.
If necessary, splice additional AWG 8, or
heavier, wire to the heavy red lead using
the splice connector supplied.
C. Use AWG 8, or heavier, wire to
connect the other side of the circuit break-
er to the vehicle battery.
D. Connect the black wire directly to
the vehicle frame as close as possible to
the siren.
3-6. SPEAKER CONNECTIONS.
Either 58 watt or 100 watt speakers
may be used with the PA 2100. The PA
2100 is also capable of driving a single 200
watt speaker such as the Federal TS200.
P30! SW302 — J302
fcc ie
2304/0339
Figure 3-2. Siren Module Rear View.
If one or two 58 watt speakers such as
Federal's CP 25 or TS 24 are being installed,
set the speaker HI/LOW switch, SW302, to
LOW. See figure 3-2 for the location of
SW302. Connect the speaker leads to the SPKR
terminals with AWG 18 wire, as shown in
figure 3-3.
CAUTION
When using 58 watt speakers,
ALWAYS be sure that the Speaker
switch is set to LO. If the speaker
switch is set to HI, the 58 watt
speakers will probably be damaged
or destroyed.
When 100 watt speakers such as Federal's
CP100 or TS100 are being installed, set
SW302 to HI before connecting the speakers
to the siren. Use AWG 18 wire as indicated
in figure 3-3.
When two speakers are used, it is nec-
essary to connect the speakers in parallel
and in phase for optimum performance. This
can be accomplished by connecting the speak-
er leads marked "1" to the same SPKR ter-
minal on the siren and the two leads marked
"2" to the other SPKR terminal (see figure
3-3).
The PA 2100 is capable of driving only
one TS200 speaker. Therefore, if a TS200
is to be used with the siren, DO NOT con-
nect any other speaker to the siren. Follow
the instructions packed with the TS200 and
set the speaker switch to HI before connect-
ing the speaker to the siren with AWG 18
wire (see figure 3-4).
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Figure 3-3. 58 Watt and 100 Watt Speaker Connections.
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SIREN MODULE ADAPTER MODUL
MICROPHONE
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CHANNEL
2904/0289
Figure 3-4. TS200 Speaker Connections.
3-7. RADIO INTERCONNECTIONS.
NOTE
Refer to Section IV for a
description of the operation
of the PA override and com-
mon microphone features.
The PA 2100 can be easily
set for operation in either
of these modes. If required,
the mode of operation can be
changed at a future date.
A. PA Override Connections.
In order to take advantage of the
PA override feature, separate microphones
are required for the two-way radio and
the siren PA function. If PA override op-
eration with rebroadcast of radio messages
is desired, proceed as follows (see figure
3-5):
1. Slide the Siren Module from the
PA 2100 chassis.
2. Slide the optional FN900 Adapter
Module into the Adapter Module Channel.
3. Start the sheet metal screw pro-
vided through the hole in the channel and
into the hole in the bottom of the Adapter
Module.
4, Replace-the Siren Module in the
PA 2100 chassis. Make sure that the con-
nector on the Siren Module mates proper-
ly with the connector on the Adapter Mod-
ule. Tighten the sheet metal screw that
was inserted in step 3.
Figure 3-5. Adapter Module Installation.
5, Connect the brown zip cord across
the two-way radio's speaker voice coil ter-
minals.
6. Plug the Model MNCT Microphone
into the Adapter Module. The PA 2100 is
now set for PA override operation,
B. Common Microphone Connections.
1. Obtain the Adapter Module that is
appropriate for the make of two-way radio
in the vehicle. Install the Adapter Module
in accordance with the instructions supplied
with the module.
2. Plug the two-way radio micro-
phone into the receptacle on the Adapter
Module. The PA 2100 is now set for com-
mon microphone operation.
C. Modification of Siren Amplifier for
Positive PTT Circuits.
Perform the following modification
only if the radio on your vehicle has a posi-
tive PTT circuit (refer to the instructions
provided with the adapter module).
1. Slide the Siren Module out of the
housing.
2. Remove the Main Circuit Board from
the module by removing the mounting screws
and unplugging the Main Circuit Board from
the Front Circuit Board. Disconnect the
rear connector (J303) from the Main Board
and lift the board away from the Chassis.
3. Solder a length of AWG 22 bare wire
between P201 and P202 on the foil side
of the Front Circuit Board in the Siren Mod-
ule. See figure 3-6 for the location of P201
and P202.
4. Replace the Main Circuit Board in
the Siren Module chassis. When reconnect-
ing J303, make sure that the color dot on
the connector is next to the color dot on the
board.
5. Replace the Siren Module in the
housing.
3-8. IGNITION CIRCUIT.
Connect the terminal labelled IGN to
the vehicle ignition or accessory circuit
using AWG 16 wire. This terminal supplies
power to the panel light and pilot Light as
well as the radio control circuit when the
ignition switch is turned on.
3-9. HORN RING CIRCUIT.
To connect the vehicle's horn ring cir-
cuit so that the horn ring controls the si-
ren's Manual Wail operation in MANUAL
and TAP II operation in WAIL, YELP, and
HI-LO, proceed as follows (see figure 3-7):
A. Locate the wire that connects the
horn ring to the horn relay or the horns.
Cut this wire and, if necessary, splice addi-
tional wire to each end so that these wires
can be terminated on the rear of the PA
2100,
B. Connect the wire that is connected
to the horn ring switch to the PA 2100 ter-
minal labelled RING.
pu
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29041025
Figure 3-6. P201 and P202 Location.
C. Connect the wire from the horn
relay or horn(s) to the HORN terminal on
the rear of the PA 2100. The siren auto-
matically compensates for both positive
and negative horn ring circuits without any
adjustments.
3-10. RADIO CONTROL CIRCUIT.
NOTE
Before performing the procedure in
this paragraph, ensure that the in-
structions in paragraph 3-8 have
been performed.
Proper connection of the radio control
circuitry allows power to be supplied to the
two-way radio whenever the vehicle's igni-
tion is on or when the SELECTOR switch is
set to RADIO (radio rebroadcast). To per-
form this connection, proceed as follows
(see figure 3-8).
A. Connect a wire from the vehicle's
two-way radio relay control circuit to the
RC terminal on the rear of the PA 2100. If
necessary, refer to the two-way radio ser-
vice manual to locate this wire in the radio.
TO BATTERY
| CUT WIREN
TO HORN, OR TO HORN
HORN RELAY SWITCH
29041023
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REAR PANEL OF
SIRACOM I CONTROL MODULE
Figure 3-7. Horn Ring Connections.
B. If the two-way radio draws more
than 10 amperes of current, install a 12V
DC relay in the circuit. Connect one end
of the relay coil to the RC terminal on the
rear of the siren module. Ground the other
end of the relay coil. Use the relay contacts
to control power to the radio. See figure 3-8,
NOTE
FCC Rules and Regulations re-
quire the use of a key-lock switch
to control the power to a mobile
transmitter. Therefore, wire the
PA 2100 RC terminal to control
power to the receiver only. Wiring
to accomplish this type of control
varies with the type of two-way
radio. Refer to the radio manu-
facturer's service manual.
3-11. MASTER SWITCH.
Terminals 1,2, and 3, on the rear panel
of the PA 2100 are controlled by the MASTER
switch. Any combination of terminals can
be controlled by a given position of the
MASTER switch. The actual terminals con-
trolled by a given position of the MASTER
switch are programmed by means of the nine
section miniature rocker switch inside of
the Control Module. To make use of this
capability, proceed as follows:
A. Connect the devices to be controlled
by the MASTER switch, SW 401, to terminals
1,2, or 3 on the rear of the unit (terminal 4
is not connected to SW 401). For example,
flashing lights may be connected to terminal
1; rotating lights to terminal 2; and the op-
tional flasher to terminal 3. If desired,
several devices may be connected to a given
terminal, provided that the 30 ampere cur-
rent capacity of the terminal is not exceeded.
RELAY NOT NEEDED IF RADIO
DOES NOT DRAW OVER 10 AMPS.
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Figure 3-8. Radio Control Connections.
-10-
NOTE
The MASTER switch is programmed
by means of the nine section minia-
ture rocker switch, SW501. As
shown in figure 3-9, each section
of the switch is labeled to indicate
the terminal and the MASTER po-
sition that it programs. ONE,
TWO, and THREE indicate the
terminal programmed by each
group of three switch sections.
The numerals "1", "2", and "3"
denote the MASTER position con-
trolled by the individual rocker
switch sections. For example,
the closed contact of ONE-1
programs terminal 1 for MASTER
Position 1, the ONE-2 contact pro-
grams terminal 1 for MASTER po-
sition 2; etc. Therefore, when
ONE-1 is depressed, the device(s)
connected to terminal 1 is (are) en-
ergized when the MASTER switch
is set to position 1; when ONE-2
is depressed, the device(s) con-
nected to terminal 2 is(are) ener-
gized in MASTER position 2; etc.
B. Determine which device(s) is(are)
to be controlled by each MASTER switch
position. Using the example in step A, it
may be desired to activate the flashing
lights in MASTER switch position 1, rotating
lights in position 2, and all three devices in
position 3.
To program the example described in
steps A and B of this paragraph, close
switches ONE-1 and ONE-3 to program ter-
minal 1 (flashing lights) for MASTER posi-
tions 1 and 3, respectively. Close TWO-2
and TWO-3 to program terminal 2 (rotating
lights) for positions 2 and 3 respectively.
Close THREE-3 to program terminal 3
(optional flasher) for MASTER position 3
(see figure 3-9).
C. Remove the top cover of the chas-
sis by loosening the hex head captive screws
and sliding off the cover.
D. Program the MASTER switch by
depressing the appropriate sections of
SW501 with a pencil point or similar pointed
tool. As indicated in figure 3-9, the switch
contacts are closed when the upper half of
the rocker is pressed. Any combination of
terminals can be controlled by any given
MASTER switch position.
E. Replace the top cover on the chas-
sis.
MASTER CONTROL POSITIONS
1-2-3 1-2-3 1-2-3
TERMINALS
2904/0248
Figure 3-9. MASTER Switch Programming.
3-12. FLASHER OPTION.
Those sirens designated PA 2100*012F
on the rear legend plate include the factory-
installed Flasher option. If your siren is
NOT designated PA 2100*012F, disregard
the procedure in this paragraph.
The flasher circuitry has an On Over-
ride and an Off Override feature. When a
positive voltage is applied to terminal B,
on the rear panel of the PA2100, the lamp(s)
connected to the FLA OUT terminals are
illuminated continuously, regardless of the
voltage present at FLA IN. Conversely, a
positive voltage at terminal A, on the rear
panel, causes the lamp(s) connected to
FLA OUT to be off continuously, regardless
of the voltage present at FLA OUT or ter-
minal B.
Figure 3-10 shows the wiring diagram
of a typical headlight flashing circuit, This
circuit is configured so that the flasher cir-
cuitry inthe siren is defeated when the
headlight switch is turned on.
A. Single Flasher Operation.
1. Connect a flasher control switch
that is capable of controlling 12VDC such as
a Control Module Accessory Switch or a
MASTER CONTROL switch terminal, to the
FLA IN terminal on the rear of the Control
Module.
2. Connect the circuit to be flashed
to the FLA OUT terminal closest to the
FLA IN terminal.
B. Alternating Flasher Operation.
1. Connect a flasher control switch
that is capable of controlling 12VDC, such
as a Control Module Accessory Switch or
a MASTER switch terminal, to the FLA IN
terminal on the rear of the Control Module.
2. Connect the circuits to be alter-
nated to the FLA OUT terminals, one cir-
cuit to each of the terminals,
-11-
LEFT SHUTS OFF FLASHER WHEN HEADLIGHT
SWITCH IS ON. { iF REQUIRED IN YOUR STATE }
VEHICLE HEADLIGHTS
HIGH BEAM
LOW BEAM
RED HIGH BEAM "(5
HIGH
BEAM
DIMMER
SWITCH
TO VEHICLE
HEADLIGHT
SWITCH
RIGHT
TURNS HIGH BEAM tL AMPS ON STEADY,
SHUTS OFF FLASHER WHEN DIMMER
SWITCH IS SET FOR HIGH
16 GA] “— 16 GA
6 2 © @ © © @
FLA FLA FLARING HORN A B C
La —
IN “OUT PAZIOO X OI2
| 2 3 4 1GN RC -SPKR,
[e 8s 22 0 0 0 0]
TO FLASHER POWER
SWITCH (PA2100
MASTER SWITCH,
ACCESSORY CONTROL
SWITCH, OR OTHER
CUSTOMER SUPPLIED
SWITCH).
2504 1348
Figure 3-10. Typical Headlight Flashing Circuit.
3-13. RELATIVE PA LOUDNESS ADJUST-
MENT.
After all of the electrical wiring to the
PA2100 is complete, set the SELECTOR
switch to PA. Depress the microphone
push-to-talk switch, speak in a normal
voice, and adjust the front panel GAIN con-
trol for the desiréd sound level outside the
vehicle. Turn on the two-way radio and ad-
just the volume for a comfortable listening
level inside the vehicle, Set the siren
SELECTOR switch to RADIO. Stand out-
side of the vehicle and note the radio rebroad-
cast loudness. If it is too loud, or too soft,
adjust R142, accessible through a hole in the
top of the unit (see figure 3-11), for the de-
sired level.
Clockwise rotation of R142 decreases
the sound level. Counterclockwise rotation
increases the sound level.
When this adjustment is completed, the
loudness of the radio rebroadcast and public
address may be controlled with the front
panel GAIN control.
Secure the PA2100 to the mounting
bracket with 1/4 - 20 x 3/4" hex head screws
and 1/4" split lockwashers. Tilt the PA
2100 to the desired position and tighten the
Figure 3-11. PA 2100 Top View.
SECTION IV
OPERATION
| PA2100 FEDERAL
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MANUAL—y
SELECTOR
28041033
Figure 4-1. PA2100 Front View
4-1. GENERAL.
As shown in figure 4-1, all PA 2100 op-
erating controls are located on the front
panels of both the Siren Module and the Con-
trol Module.
A line of optional adapter modules allows
the user the option of using either the siren's
own microphone (PA override) or the two-way
radio microphone (common microphone).
The optional Model MNCT Microphone
and Model FN900 Adapter Module are re-
quired when PA override operation is used.
When the siren is connected for PA over-
ride operation, the two-way radio and the
siren each have their own separate micro-
phones. In addition the public address is
available in any SELECTOR switch position,
except RADIO, when the microphone push-
to-talk switch is depressed.
In common microphone operation, the
radio microphone is used for both the siren
and the two-way radio in the vehicle. A
Federal adapter module, that is designed to
accommodate the two-way radio microphone
connects the siren directly to the radio.
The common microphone is electrically con-
nected to the two-way radio in all SELEC-
TOR switch positions except PA. When
the SELECTOR switch is set to PA, the
two-way radio microphone is connected to
the siren amplifier so that announcements
can be made over the siren speaker system.
-12-
4-2. MASTER SWITCH.
The MASTER switch is a four position
rotary switch that is used to control the
vehicle's emergency warning light system
and the electronic siren. The equipment
controlled by a given MASTER switch po-
sition depends upon the configuration of
the individual installation.
In a typical installation, secondary
warning lights (flashing lights) are ener-
gized when the MASTER switch is set to
position 1. Revolving lights are ordinarily
installed so that they function in position
2. In position 3, the siren can be activated
when the siren's SELECTOR switch is set
to one of the siren positions. In addition,
any combination of warning lights that are
activated in positions 1 or 2 or additional
warning lights can be energized when the
MASTER CONTROL is in position 3.
The MASTER switch position is indi-
cated by three red LED'S (light emitting
diodes) on the front panel of the Control
Module. The "0" position of the switch is
the "off" position and all of the LED'S are
extinguished. When the MASTER switch is
in position 1, one of the LED'S illuminate;
in position 2, two LED'S are illuminated,
and in position 3, all three LED'S illumi-
nate.
If your installation was wired as de-
scribed in paragraph 3-9 of this manual,
the horn ring activates the vehicle's horn
when the MASTER switch is set to position 0,
1, or 2, However, when the MASTER switch
is set to position 3, the horn ring or other
auxiliary switch operates the TAP II feature
if the SELECTOR switch is set to WAIL,
YELP or HI-LO. The TAP I feature is
operated by actuating the auxiliary switch,
causing the siren to "Yelp"' until the auxili-
ary switch is operated again.
The Manual Wail signal is operational
in all four MASTER switch positions pro-
vided that the SELECTOR switch is in the
MANUAL position. When the MASTER switch
is in positions 1 or 2, and the SIREN switch,
SW201, is depressed, the siren sounds until
SW201 is released. When SW201 is released,
the siren signal ceases immediately. The
operation of the Manual Wail signal when the
MASTER switch is in position 3 is similar
except that when SW201 is released, the
frequency of the siren signal ''coasts down"
to approximately 550Hz before it ceases.
If your installation has been wired as
described in paragraph 3-8,power is applied
to the two-way radio whenever the vehicle
ignition switch is on. In addition, the front
panel of the PA 2100 is illuminated and the
green LED above the MASTER switch is
lit, indicating that power is applied to the
siren.
4-3. GAIN CONTROL.
The GAIN control controls the loudness
of the sound output from the siren speaker(s)
when the siren is being usedas a public
address or radio rebroadcast amplifier.
Clockwise rotation of the GAIN control in-
creases the sound level from the speaker.
The GAIN control does not control the vol-
ume of the siren.
The maximum usable setting of the
GAIN control is determined by the setting
of the control where feedback or "squeal"
occurs. The sound level at which "squeal"
occurs depends upon microphone gain, spea-
ker placement, the proximity of reflective
surfaces, etc. Adjust the GAIN control to
the position just below the point at which
feedback occurs, or as desired.
-13-
4-4. SELECTOR SWITCH.
The SELECTOR switch is a six-posi-
tion rotary switch that selects the siren
function. The following describes the six
positions of the SELECTOR switch:
A. RADIO
When the SELECTOR is in this po-
sition, incoming radio messages are ampli-
fied by the siren amplifier and rebroadcast
over the siren speaker system. Volume
is controlled by the GAIN control. An
LED indicator illuminates to indicate that
the SELECTOR switch is set to RADIO.
If the system is wired as described
in paragraph 3-8, power is always supplied
to the two-way radio, even if the ignition
switch is off.
B. PA
When the SELECTOR is set to the
PA position, the siren amplifier may be
used as a public address amplifier. In those
installations where the siren and the two-
way radio share the same microphone, the
PA position is the only SELECTOR switch
position that connects the microphone to
the siren amplifier.
C. MANUAL
This position of the SELECTOR
switch allows operation of the siren with
the front panel SIREN pushbutton switch.
The siren can also be activated by means
of an auxiliary switch, such as a foot
switch ox horn ring switch.
D. WAIL
In this position the siren produces
a continuous "wailing' sound, up and down
in frequency.
E. YELP
This position of the SELECTOR
switch causes the siren to produce a rapid
"warbled' tone.
F. HI-LO
In this switch position the siren pro-
duces a two-tone signal. This distinctive
signal may be reserved for any special in-
dication or situation.
4-5. SIREN BUTTON.
The SIREN button activates the siren
when the SELECTOR switch is set to the
MANUAL position.
SECTION Y
SIREN MODULE CIRCUIT DESCRIPTION
5-1. GENERAL.
Refer to the Siren Module Functional
Block Diagram, figure 5-1, and the Siren
Module Schematic Diagram, figure 6-4,
while reading the following paragraphs.
5-2. TONE CONTROL OSCILLATOR.
A. General
When the SELECTOR switch,
SW301, is set to the WAIL, YELP, or HI-
LO position, IC101 and IC102 control the
siren tone output. The control voltage gen-
erated by IC102 controls the output fre-
quency of the VCO (voltage controlled os-
cillator).
В. WAIL
When SW301 is set to WAIL, the
Wail tone control voltage is initiated by
IC102. IC102 is basically a timing circuit
whose output voltage levels are used to con-
trol the charge and discharge of timing
capacitor, C106. C106 charges through
CR104 and R106 until it reaches I1C102's
threshold voltage (approximately 6.9 volts).
When the voltage on C106 and IC102-6
reaches approximately 6.9 volts, 1C102
changes states and C106 discharges through
R126, R127 and R128. When the voltage on
C106 reaches the trigger voltage of 1C102
(approximately 3.5V), IC102 again changes
states and the cycle repeats. The WAIL
control voltage at IC102-6 is then applied
to Emitter Follower, Q101 and to the
Scaling Amplifier, IC103B.
The Scaling Amplifier expands (scales)
and inverts the control voltage waveform
at the emitter of Q101 to the level necessary
to control the Voltage Controlled Oscillator
(VCO) without significantly affecting the
shape of waveform. The gain of IC103B is
determined by R113 and R116. The scaled
control voltage waveform at IC103B-1 is
coupled through CR108 to the VCO Control
Point, IC104-5.
VCO
HORN —» CONTROL
RING + AUXILIARY TAP IL/ TONE ICIO3A VOLTAGE
CIRCUIT INPUT MANUAL CONTROL CONTROLLED
> 1 WAIL CONTROL |} OSCILLATOR |»
CIRCUIT OSCILLATOR
Icios.alo4 ICI05,SW30IE SW301D,ICIOI, EMITTER 0104
) Q102,Q105 ICI02 CIO6
FOLLOWER
AND SCALING |
MICROPHONE oor T6038 La
PUSH-TO-TALK ? CIRCUIT
CIRCUIT PUSH -TO-TALK ICIOSA
> » OVERRIDE
SW30IE
MICROPHONE
AUDIO FROM FREE
ADAPTER
_ MODULE |
7 ++ A
213 la 5 DRIVER
| 6 AMPLIFIER
9108, 9109
RADIO INPUT 5 УЗОТЕ
FROM GAIN y
MODULE RADIO INPUT © R30! <«{ OUTPUT
N ISOLATION Ll | HM LO AMPLIFIER
7 TRANSFORMER о 9 0—— «1 Q30(,Q302
TION
29041019 [o SPEAKERS P301-5,-6 _
Figure 5-1. Siren Module Functional Block Diagram.
-14-
The output signal from the Voltage Con-
trolled Oscillator, IC104, is a series of
pulses whose frequency is determined by
R119, R120, C105 and the control voltage
at the VCO control point, IC104-5. As
the control voltage at IC104-5 increases,
the frequency of the output of 1C104 de-
creases, Conversely as the control voltage
decreases the output frequency increases.
The output signal from IC1043 is applied
to the + 2 Circuit at IC105A-13.
The + 2 Circuit, IC105A, is a toggle
flip-flop that divides the pulse frequency by
2. The symmetrical output from this cir-
cuit is present at IC105A-15.
When the siren operator turns off the
WAIL tone, the timing capacitor, C106 be-
gins discharging toward zero volts. How-
ever, C106 is connected through CR105 and
R109 to the regulated supply of Q101. As
a result, C106 does not completely dis-
charge to zero volts. Consequently, the
residual charge on C106 is applied to Q101
and IC103B, applying a constant level con-
trol voltage to IC104-5. Simultaneously,
Q101 also applies a sample of the voltage
on C106 to the VCO Control Point, IC103A-5.
When the voltage at IC103A-5 becomes less
positive than the fixed voltage at IC103A-6,
IC103A-7 goes low. This low resets the + 2
Circuit, preventing the constant level con-
trol voltage at IC 104-5 from allowing the
VCO to generate an annoying and false con-
stant frequency tone.
C. YELP.
When SW301 is set to YELP, the op-
eration of the circuitry is similar to WAIL,
except that C106 charges through CR106
and R104 and discharges through R126 and
IC101C. The charge and discharge rate of
C106 is more rapid in YELP than in WAIL.
Consequently, the control voltage varia-
tions and the resultant tone frequency vari-
ations are more rapid in YELP than in
WAIL,
D. HI- LO.
In HI-LO, C106 charges through
CR104 and R105 and discharges through R126,
R127 and IC101D, producing a symmetrical
square wave at IC102-3. When the voltage
at IC102-3 is high, the VCO control voltage
- 15-
developed by R102 and R118 and is applied
directly to the VCO control point, IC104-5.
When IC102-3 is low the voltage at IC104-5
is determined by R102, R103, and R118.
5-3. + AUXILIARY INPUT.
The + Auxiliary Input circuit consists
of CR110, CR111, Q104, IC106, and asso-
ciated components. This circuit allows
the Manual Wail and TAP II circuits to re-
spond to the vehicle's horn ring or other
auxiliary switch without regard to polarity
when the MASTER switch is set to position
3.
In the off state, Q104 is biased off,
causing a low to be present at IC106-3. If
a negative horn ring circuit is used to trig-
ger the + Auxiliary Input Circuit, depres-
sing the horn ring applies a negative (ground)
potential to the cathode of CR111, allowing
CR111 to conduct. The conduction of
CR111 brings Q104 into conduction, caus-
ing IC106 to turn on and produce a high at
IC106-3. This high remains at IC106-3
for the entire time that the horn ring is de-
pressed, plus approximately 200 millisec-
ond after the horn ring is released. The
high at IC101-3 is applied to IC102, allow-
ing the Tone Control Oscillator to operate
as previously described.
If a positive horn ring circuit is used
to activate the + Auxiliary Circuit, the op-
eration of the circuit is similar. When the
horn ring is depressed, the positive voltage
(+14VDC) causes CR110 to conduct so that
a positive voltage is applied to the base of
Q104, bringing Q104 into conduction. Q104
then activates IC106 and the circuitry op-
erates as previously described.
5-4. MANUAL WAIL AND TAP Ц.
The SIREN switch, SW201, can operate
the Manual Wail signal whenever the
SELECTOR switch is set to MANUAL. The
Manual Wail signal can also be activated
by the horn ring or other auxiliary switch
when the MASTER switch is set to position
3.
When SW201 is depressed, the base of
Q107 is grounded through R157 and CR207,
turning on Q107. The conduction of Q107
simultaneously turns on Q106, Q103, and Pre-
amplifier IC107. The conduction of Q103
allows the Tone Control Oscillator to begin
generating a Wail signal. The conduction of
Q106 turns on the Driver Amplifier, Q108
and Q109.
As described in paragraph 5-3, if the
MASTER switch on the Control Module is
set to position 3, the + Auxiliary Input
circuit can activate the Manual Wail signal.
TAP II operation is accomplished by
the + Auxiliary Input circuit in conjunction
with IC105 and IC106. When an input is
applied to the + Auxiliary Input, IC106 ap-
plies a positive pulse to IC105-3 causing
IC105-1 to be grounded. This ground is
applied through R122 to Q102, bringing
Q102 into conduction. The conduction of
Q102 applies positive voltage to CR103 and
R104 to start the Yelp signal. The positive
voltage from Q102 also turns on IC101C,
IC101C, acts as part of the discharge path
for C106.
The Yelp signal continues until the +
Auxiliary Input circuit causes 1C106 to pro-
duce another positive pulse at 1C105-3. As
a result, the voltage at IC105-1 returns to
its high level, turning off Q102, and normal
siren operation resumes.
IC105-7 is held at ground potential for
TAP II operation. However, when the
SELECTOR switch, SW301, is set to RADIO,
PA, or MANUAL, TAP II operation is not
required. Therefore, to prevent the opera-
tion of the TAP II circuitry when SW301 is
set to RADIO, PA, or MANUAL, IC105 is
held reset by the application of the positive
supply voltage to IC105-7. IC105-7 is also
held positive between switch positions so
that IC105 is held reset as the position of
SW301 is changed.
5-5. PREAMPLIFIER AND AMPLIFIER
STAGES.
All siren and audio signals are applied
to the Preamplifier, IC107. Siren signals
are applied through C114 and R147 to
- 16-
IC107-6. Audio signals from the micro-
phone or radio are coupled through C115
and R145 to IC107-2. The amplified output
at IC107-8 is coupled through C118 to the
primary of T102, The secondary of T102
applies a push-pull input to the Driver Am-
plifier Q108 and Q109. The collectors of
this stage are coupled to the output Ampli-
fier, Q301 and Q302. The output of
Q301 and Q302 is coupled through T301 and
P301-5 and 6 to the siren speaker(s). The
HI/LO switch, SW302, is set to HI when a
200 watt speaker or 100 watt speakers are
connected to the siren. SW302 is set to LO
when 58 watt speakers are used,
5-6. PUSH-TO-TALK OVERRIDE.
When the siren and the two-way radio
each have separate microphones, the siren
is set for PA override operation. The PA
override feature allows the siren operator
to use the siren as a public address ampli-
fier when the SELECTOR switch is set to
any position except RADIO.
When the operator depresses the micro-
phone push-to-talk switch, the Push-To-
Talk Line is grounded. This ground poten-
tial is applied through SW301 to IC301A and
through Q101 to IC103B. In addition, the
ground potential is also applied to the Tim-
ing Capacitor, C106, preventing it from
alternately charging and discharging. Asa
result, siren tone generation ceases, allow-
ing microphone audio to be amplified by the
Preamplifier and Amplifier stages.
5-7. ALTERNATING FLASHER.
The optional Alternating Flasher is
located on a printed circuit board in the
Control Module. The schematic diagram
of this circuit is shown in figure 6-12.
The Alternating Flasher is basically
an astable multivibrator that operates at a
nominal rate of 90 cycles per minute.
SECTION VI
SERVICE AND MAINTENANCE
6-1. GENERAL.
Most of the electronic component parts
used in the PA2100 are standard items that
are available from almost any radio or
electronics supply outlet.
The factory can and will service your
equipment or provide technical assistance
with problems that cannot be handled satis-
factorily and promptly locally.
Address all communications and ship-
ments to:
Service Department
Signal Division
Federal Signal Corporation
136th and Western Avenue
Blue Island, Illinois 60406
If any unit is returned for adjustment
or repair, it can be accepted only if we are
notified by mail or phone in advance of its
arrival. Such notice should clearly indi-
cate the service requested and give all per-
tinent information regarding the nature of
the malfunction and, if possible, its cause.
The following diagrams are provided to
assist repair personnel when service to the
equipment is required.
Fig. Diagram
6-1 SELECTOR Switch Diagram
6-2 Siren Module Printed Circuit Board
Removal
6-3 Siren Module Internal View
6-4 Siren Module Schematic Diagram
6-5 Siren Module Main Circuit Board
Parts Location Diagram
6-6 Siren Module Front Circuit Board
Parts Location Diagram
6-7 PA2100 Bottom View
6-8 Control Module Internal View
6-9 Control Module Schematic Diagram
6-10 Control Module Relay Circuit Board
Parts Location Diagram
6-11 Control Module LED Circuit Board
Parts Location Diagram
6-12 Control Module Optional Flasher
Board Schematic Diagram
6-13 Control Module Optional Flasher
Circuit Board Parts Location
Diagram
-17-
6-2. SIREN MODULE.
A. General
Any competent electronic technician
should have little difficulty in tracing and
correcting a malfunction. When trouble-
shooting the PA2100 Table 6-1 may be use-
ful for isolating a malfunction.
When replacing small components,
use care when soldering. Heat easily dam-
ages integrated circuits, transistors,
capacitors and circuit boards. Therefore,
it is advisable to use longnose pliers or
similar heat sink on the component lead
being soldered.
When replacing the Driver Ampli-
fier transistors, Q108 and Q109, or the
Output Amplifier transistors, Q301 and
Q302, insure that a matched pair is used.
In addition, always replace the mica insu-
lators. Use heat sink compound on both
sides of the mica insulators and ensure
that they are properly installed. Improper
installation of the insulator could cause a
short circuit,
Always adjust the symmetry of the
output waveform when Q108 and Q109 or
Q301 and Q302 are replaced. To perform
this adjustment, disconnect the speaker(s)
and connect a 5.5 ohm 200 watt dummy
load across the speaker terminals. Connect
an oscilloscope across the dummy load and
activate the Yelp signal. Adjust R158 for
the best possible square wave. See figure
6-2 for the location of R158.
B. Removal for Servicing.
The Siren Module is easily removed
from the PA2100 chassis. To remove the
Siren Module, loosen two of the hex head
screws on the bottom of the unit, and slide
the Siren Module out (see figure 6-7).
C. Circuit Board Removal.
1. To remove the Main Circuit Board
remove the three screws that hold the board
in the Siren (see figure 6-2). Disconnect the
socket at the rear of the board and lift the
board out of the module. When replacing the
Main Circuit Board, align the socket at the
rear so that the color dot on the socket is
adjacent to the color dot on the circuit board.
Also be sure that the two plugs on the front of
the circuit board mate properly with sockets
on the Front Circuit Board.
2. To remove the Front Circuit
Board, remove the Main Circuit Board as
described in subparagraph 6-2.C.1. Loosen
all control knob set screws and slide the
knobs from their control shafts. Remove
the spanner nuts that hold the SELECTOR
and the GAIN control to the front panel of
the module. Remove the screw that holds
the siren button bracket in place (see figure
6-7) and lift out the Front Circuit Board.
6-3. CONTROL MODULE.
To gain access to the interior of the
Control Module, loosen two hex head screws
on the bottom of the PA2100 (see figure 6-7).
Slide cover off the unit.
Most of the circuitry in the Control
Module is used to control power to ve-
hicle accessories. Therefore, if a mal-
function occurs in a given circuit the prob-
lem is probably external to the Control
Module. However, before troubleshooting
the external circuitry always be sure that
rear panel of the Control Module is properly
wired.
If a malfunctioning device is controlled
by the MASTER switch, SW401, make sure
that SW401 is properly programmed by the
nine section miniature rocker switch, SW
501 (refer to paragraph 3-11).
To remove the Control Module from the
PA2100 housing, it is only necessary to
loosen one hex head screw (see figure 6-17).
If optional accessory switches are in-
stalled to control other vehicle accessories
always check the switches for proper opera-
tion before troubleshooting the external de-
vices.
The optional Alternating Flasher oper-
ates by use of electronic circuitry, If
this circuitry fails, see the schematic dia-
gram figure 6-12 and the parts location dia-
gram figure 6-13,
A-3-4-5-6 0)
Dw
D-40 E 0-3
D-6
Lo
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\ A
ON E-1
F-!
F-2-3-4-5-6
SW30I A-6
SWITCH |
NUMBER
SECTION
A,B,C,D,E,F,G
POSITION
1,2,3,4,5,6,w
(w= WIPER)
WAFER NO. |
NEAREST DETENT
WAFER NO. 2
WAFER NO. 3
REAR WAFER
BACK OF SWITCH
2904/2239
Figure 6-1. MASTER Switch Diagram.
-18-
Table 6-1 lists voltages and waveforms, that appear on the integrated circuits
and transistors in the PA2100 when the SELECTOR switch is set to its various
positions.
abbreviations and their meanings are as follows:
R = RADIO
P = PA
M = MANUAL
Table 6-1.
Abbreviations are used to describe the SELECTOR position. These
W = WAIL
Y = YELP
H = HI-LO
PA2100 Voltages and Waveforms.
When a waveform is present at a given point, the waveform is listed by a cap-
ital letter, its cycle rate and its peak-to-peak voltage.
For example, the wave-
form at IC101-3 is listed as A/45-55,1. Therefore, when an oscilloscope is con-
nected to IC101-3, waveform A having a cycle rate of 45-55 cycles per minute (or
Hz, if specified) and a nominal amplitude of 1 volt peak-to-peak (Var. = varying)
should be observed. All waveforms are illustrated at the end of this table.
1C101 1C102
SELECTOR Voltage or SELECTOR Voltage or
Pin Position Waveform Pin Position Waveform
1 All 10. 5VDC | 2,6 W B/10,3
2 H 10. 5VDC 2,6 Y B/160-190,3
3,4 H A/45-55,1 2,6 H B/45-55,3
5 H 10VDC 3 W A/109.8
6 H 10VDC 3 Y A/160-190,9.8
8 H OV 3 H A/45-55,9.8
11 Y OV 4 All 10.5VDC
12 Y 10.5VDC 5 All 7VDC
13 H 10.5VDC 7 W C/10,7
14 All 10.5VDC 7 Y C/160-190,7
7 H C/45-55, 7
8 All 10. 5VDC
2 M 1. 9IVDC
6 M 1. 9IVDC
7 M OV
IC103
1 Wo Y B/10,2.8 1С104
2 H 10. 5VDC
3 All 5.25VDC 2,6 W,Y,H C/1000-3000Hz, Var.
5 W B/10,3 3 W,Y,H D/1000-3000Hz,9.8
5 Y B/160-190,3 4 All 10.5VDC
5 H B/45-55,3 5 W B/10,3
6 All 2. TVDC Э Y B/160-190,3
7 W,Y,H 9.0VDC, min. О H A/45-55, 0.9
7 M,P,R 0.5VDC 7 W,Y,H E/1000, 3000Hz. Var.
8 All 10. 5VDC 8 All 10. 5SVDC
-19.
IC105 IC106
SELECTOR Voltage or SELECTOR Voltage or
Pin Position Waveform Pin Position Waveform
1 All 10. 5VDC 2 All 10. 0OVDC
3 All OV 3 All OV
5 All 10. 5VDC 4 All 10. 5VDC
6 All 10.5VDC 5 All 7.0VDC
7 W,Y,H OV 6 All OV
7 M,P,R 10.5VDC 7 All OV
10 W,Y,H 9. OVDC 8 All 10. 5VDC
10 M,P,R 0.5VDC
11 W,Y,H 9.0VDC
11 M, P,R 0. 5VDC IC107
12 All 1, 0VDC max. 1 All 6.3VDC
13 W,Y,H D/1000-3000Hz,10 8 W,Y,H F/500-1500Hz, 10
15 W,Y,H A/500-1500Hz, 10. 5 8 P,R G/1000Hz, 1.8
16 All 10.5VDC 14 All 13.6VDC
_Q101
B,E W B/10,3
|В, Е Y B/160-190, 3 _Q103
B,E H B/45-55,3 B All 11.0VDC
B,E P,R 1.5VDC E All 10.5VDC
|В, Е M 1. 9VDC C All 13.6VDC
C All 10.5VDC
_Q106
B All 0.7VDC
_Q108, 109 E All OV
B W,Y,H | A/500-1500Hz,30 C All 0.3VDC
B P,R G/1000Hz,5
E W,Y,H | A/500-1500Hz, 23
E P,R G/1000Hz, 5 _Q107
C W,Y,H A/500-1500Hz, 1.5 B All 12.9VDC
C P,R H/1000Hz, 0.8 E All 13. 6VDC
C All 13.5VDC
D-D PP =
A 4 C E D UY
29041042
y ; NE, ANAL
- 0 -
Е LAF + G Y HILILY
-20-
REMOVE
REMOVE
2904/0388
— R158 (COMPONENT SIDE)
Figure 6-2. Siren Module Printed Circuit Board Removal.
J503
2904/1037
P20! — P202
J2OI
Figure 6-3. Siren Module Internal View.
_21-
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ED, 4303-8 * P20l AND P202 MOUNTED ON CONDUCTOR SIDE OF BOARD.
Figure 6-6. Siren Module Front Circuit Board Parts Location Diagram.
LOOSEN TO REMOVE COVER
LOOSEN FOR SIREN MODULE REMOVAL —
LOOSEN TO REMOVE COVER —
29041036 SIREN BUTTON BRACKET SCREW
Figure 6-7. PA2100 Bottom View.
-24-
290471040
Figure 6-8. Control Module Internal View.
— LED CIRCUIT BOARD
же ен == == == == == == == == == == == == == == == == == == == == == == == == == =ко== == == == ен == == ож т TY EE EE FE == AAA ESA EE ER AR de dd A — — — <
NOTE: FLA FLA FLA
UNLESS OTHERWISE SPECIFIED: | 2 3 4 IGN RCSPKRSPKR INP OUTOUT RNGHORNA B C
ALL RESISTORS ARE IN OHMS, K=1000, *10%, 1/4 WATT. о о о ооо о © | | о о о об д о © |
ALL CAPACITORS ARE IN MICROFARADS (UF). 18702 TB70I
) H503 6 H505 © H 501 ; 7 8
H5046 H506 © H502 | ВВ
1 1 n п
1 — =— === ! u u
1 | kso2| Де) к5оз | {Дас к5о! NC | 12
>; ы a | 70 | ©' ©
ı | CR5i4 CR5I5 CR513 ; +
CL-1 CL-1 CL-1 H509 | RED 8GA.*
©, >
' BLK 14GA..
| H510 9 ı
| 2 \3
| Eb ! но ©—
Y Y + Y Y Y
‚ |CR50I |CR5O2|CR503|CR504/CR505/CR506/CR507|CR508|CR509
! lec-1 |cL-1 [сен |cL-1 fet-1 |cL-1 JeL-r |cL-t |cL-1
' RELAY CIRCUIT BOARD
0 'o 0° 3 0 | Je
Tp suas SW401A
' _H401
Doro Dorr Doro
CR402 CR403 CR404
LED LED LED
j R402 * #403 $ R404 :
470 470 470 CONF 0/
REFN ROP 0, В] 0. о}; | MODULE
) SW401D-X > SW40ID-Y > SW40ID-Z
290C/0/48
Figure 6-9. Control Module Schematic Diagram.
-25-
Figure 6-11. Control Module LED Circuit Board Parts Location Diagram.
-26-
O- > AA
H701 TO FLA IN CR702 | R704 R703
H707 BATTERY + 4 . 3 R708 100 100K 2
IOK 5 %
o a Q 701 +
O a Ta
H702 FLA 11593 R702 C704
OUT | 0001
K7OI CR70I R701! |
CR707 C703
= R705: + ny
© 2:2K1 | c702 T-
H703 FLA C705 СТО! 4.7
О, ОО! O: Ol
K702 | CR703 [CR704 ® 706 1 | SV
) Q703 ll -
2N2925 NOTES:
Q702 SN
TIS92 UNLESS OTHERWISE SPECIFIED:
A Q ALL RESISTORS ARE IN OHMS, 10%,
R706 3 1/4 WATT: K =1,000
H706 ON OVERRIDE "В" 2:2K $R707 ALL CAPACITORS ARE IN MICROFARADS.
O- 1 ОК ALL DIODES ARE CL-1.
o ALL TRANSISTORS AS SPECIFIED.
H705 F OVER "A"
OFF OVERRIDE A _L C706 1 C707
GROUND
T 0.00]
eee
es BATTERY —
ЧО
-
FAC/00
ALTERNATING FLASHER
29041135
Figure 6-12.
Control Module Optional Flasher Circuit Board Schematic Diagram.
TO BATTERY +
TO FLA QUT
TO B'ON' OVERRIDE
TO À 'OFF' OVERRIDE
TO FLA IN
TO BATTERY — GROUND
2904736
Figure 6-13. Control Module Optional Flasher Circuit Board Parts Location Diagram.
-27-
MAIN CIRCUIT BOARD
PARTS LIST
Schematic Schematic
Symbol Description Part No. Symbol Description Part No.
RESISTORS CAPACITORS (Continued)
R101,121,122,123, 10K Ohm 100A207 C105 .047UF, 50V, Mylar 107A418
125,134,136,137, C106 .4TUF, 15V tantalum 107A621
140, 141,154,155, C108 150UF, 15V, tantalum 107A680
156 C113,118 82UF,15V, tantalum 107A650
R102,109,114, 1K Ohm, 2% 100A712 C114,115 .1UF, 100V, Mylar 107A406
115,118,120 C119,120 .0033UF, 100V, disc 107A271
R103 1.8K Ohm 100A 205
R104 1.8K Ohm, 5% 100A705
R105 5.6K Ohm, 2% 100A714
R106,107,119 30K Ohm, 2% 100A717 SEMICONDUCTORS
R108 22K Ohm 100A208
R110 330 Ohm 100A201 1C101 Circuit Integrated, RCA, 128A047
R111,112,126 100K Ohm 100A222 CD4066 AE
R113,116 220K Obm, 2% 100A719 IC102, 104, 106 Circuit Integrated, National, 128A043-02
R124 100 Ohm 100A 236 LM555C
R127 8.2K Ohm, 2% 100A715 IC103 Circuit, Integrated, National, 128A045
R128 12K Ohm, 2% 100A716 LM358
R129 56K Ohm, 2% 100A718 IC105 Circuit, Integrated, RCA, 128A 044
R130 56 Ohm, 1/2 Watt 100A414 CD4027AE
R131 3.9K Ohm 100A273 IC107 Circuit, Integrated, National, 128A046
R132 2.2K Ohm 100A221 LM380N
R133 680 Ohm 100A231 Q101,106 Transistor, NPN, Silicon, 125A119
R135 680 Ohm, 1/2 Watt 100A313 2N2925
R138 47K Ohm 100A 228 Q102,105,110 Transistor, PNP, Silicon, 125A113
R139, 142, 146 1K Ohm 100A 233 2N3702
148,149 Q103 Transistor, NPN, Silicon, 125B415
R143 Potentiometer 5K Ohm 105B204 2N5296
R144,150 10 Ohm 100A251 0104 Transistor ‚NPN ‚Silicon, 125B 132
R145 6. 8K Ohm 100A210 TIS92
R147 33K Obm 100A211 Q107 Transistor, PNP, Silicon, 125A133
R151 27 Ohm, 5% 100A290 TIS93
R152 8.2 Obm, 5% 100A724 Q108,109 Transistor, PNP, Silicon, 125B431
R153 270 Ohm, 2 Watt, WW 103A128 2N6109
R157 8.2K Ohm 100A268 CR101,102,103 Diode, T151 115B101
R158 Potentiometer, 100 Ohm 105A 244 104,105,106,
R159,161,162 39 Ohm 100A286 108,109,113
R160 4.7K Ohm, 1/2 Watt 100A320 114,116
R163,164 „47 Ohm, 2 Watt, WW 103A130 CR110 Diode, Zener,11V,1 Watt 115A245
R165 100K Ohm 100A222 CR111,112,115 Diode ED 3002S (CL-1) 115B301
RT101 Thermistor,200 Ohm 104A111
Unless otherwise specified, all resistors are MISCELLANEOUS
carbon composition, 10%, 1/4 watt. ‚
T101 Transformer, Audio 120B123
T102 Transformer, Driver 120B145
CAPACITORS $101,102, 103 Connector, Wafer 140A170
C101,104,107,109 .001UF, 500V,disc 107A263 Main Circuit Board (without 130D228
C102,110,112,117 10UF, 10V, tantalum 107A634 parts
C103,111,116 .01 UF, 25V,disc 107A226 Main Circuit Board (with parts 200D703
121,122 installed)
FRONT CIRCUIT BOARD
PARTS LIST
Schematic
Symbol Description Part No.
R201 Resistor, 470 Ohm, FC, 10%, 1/4 Watt 100A 255
R202 Resistor, 4.7K Ohm, FC, 10%, 1/4 Watt 100A224
R204, 205 Resistor, 47 Ohm, FC 10%, 1/4 Watt 100A237
C201 Capacitor, 10UF, 10V, tantalum 107A634
CR201 Pilot Light, LED, Red 147A113A-01
CR202, 203,204 Diode, TI51 115B101
205,206,207,208
DS201,202 Lamp, 14V, CM382 8469A665
SW201 Switch, Pushbutton 122A167
SW301D,E Switch, Rotary 122B164
J201,202 Connector, Right Angle 139A161
P201,202 Terminal, USECO 1280BI 233A103
Front Circuit Board (without parts) 130D229
Front Circuit Board (with parts installed) 200D702
RELAY CIRCUIT BOARD
PARTS LIST
CR501-509, Diode, ED3002S (CL-1) 115B301
513-515
K501, 502, 503 Relay, SPDT, 12V 8536A401
Sw501 Switch, Rocker, 9 Section, Miniature 122A165A-02
Relay Circuit Board (without parts) 130D224
Relay Circuit Board (with parts installed) 200D699
-28-
Schematic
Symbol
R301
C301
C302,303
C304, 305
CR117
Q301,302
T301
SW302
F301
P301
J302
3
ob DDR DD DN DD =
Schematic
Symbol
R401, 402,403,
404
R405
CR401
CRA02, 403, 404
DS401
SW401
R701
R702
R703
R704
R705,706
R707,708
C701
C702,703
C704,705,706,
707
1C701
Q701
Q702
Q703
CR701,702,703,
704,705,706,707
K701, 702
CHASSIS MOUNTED COMPONENTS
PARTS LIST
Description
Potentiometer, 10K Ohm
Capacitor, 500 UF, 15V, electrolytic
Capacitor, .001UF, 100V, disc
Capacitor, .005,100V, disc
Diode, 368AR
Transistor, NPN, Silicon 2N5885
Transformer, Output
Switch, Slide, DPDT
Fuse, 20 Ampere, 3AG
Connector, 8-contact (Cinch- Jones) P308-AB
Connector, 12 Contact (Molex 03-06-212)
Fuseholder, 342002
Knob, Control
Knob, GAIN
Connector, PC Board
ACCESSORY KIT
Description
Straight Connector, Two Collar N-35
1/4" - 20 x 3/8 Hex. Head Screw
1/4" - 20 x 1/2" Hex. Head Screw
1/4" - 20" Hex, Nut
Split Lockwasher, 1/4"
8A x 1/2" Phillips, Pan Head, Thread Forming Screw
Circuit Breaker, 12V, 50 Amp
Item Sheet
Accessory Kit, Complete
MISCELLANEOUS PARTS
Assembly, Housing
Bracket, Mounting
LED CIRCUIT BOARD
PARTS LIST
Description
Resistor, 470 Ohm, FC, 10%, 1/4 Watt
Resistor, 47 Ohm, FC, 10%, 1/4 Watt
Pilot Light LED, Green
Pilot Light, LED, Red
Lamp, Clear, 14V, CM 382
Switch, Rotary
LED Circuit Board (without parts)
LED Circuit Board (with parts installed)
OPTION F (ALTERNATING FLASHER)
PARTS LIST
Resistor, 4.7K Ohm, FC, 10%, 1/4 Watt
Resistor, 43K Ohm, FC, 5%, 1/4 Watt
Resistor, 100K Ohm, FC, 5%, 1/4 Watt
Resistor, 100 Ohm, FC, 10%, 1/4 Watt
Resistor, 2.2K Ohm, FC, 10%, 1/4 Watt
Resistor, 10K Ohm, FC, 10%, 1/4 Watt
Capacitor, 0.01 UF, 25V, Disc
Capacitor, 4.7 UF, 15V, Tantalum
Capacitor, 0.001UF, 500V, Disc
Integrated Circuit, LM555C
Transistor, PNP, T1893
Transistor, NPN, T1592
Transistor, NPN, 2N2925
Diode, ED 30028
Relay, SPST, Bosch
Printed Circuit Board (without parts)
Printed Circuit Board (with parts installed)
Part No.
106A121
108A122
107A207
107A211
115A 311
125B432
120C146
122A144
148A127
140A114
140A168
143A106
141A117
141A118
233A126
Part No.
8536A440
7002A 000-06
7003A 307-08
7059A018
7074A015
7011A012-08
8474A138
8536A418
8536A405
8536C408
8536A420
Part No.
100A255
100A237
147A113A-02
147 A113A-01
8469A665
122 B166
130C226
200C701
100A224
100A710
100A262
100A236
100A221
100A207
107A226
107A678
107A263
128A 043-02
1258133
125B132
125A119
115B301
131A125
130C239
200C722
255A 150H Printed in U.S.A.
882