INSTALLATION AND MAINTENANCE INSTRUCTIONS
SpectrAlert Selectable Output Series
Wall Speaker/Strobes for
Fire Protective Signaling Systems
For use with models: SP3R1224MC and SP3W1224MC.
U.S. Patent Nos. 5,593,569; 5,914,665; 5,850,178; 5,598,139; 6,049,446; 6,127,935; 6,522,261; 6,856,241
Specifications: Speaker
Mechanical
Input Terminals: 12 to 18 AWG
Speaker Size: 4 inches (101 mm)
Overall Dimensions: 8.25˝ × 4.9˝
Automatic selection for 12 or 24 volt rated operation (DC or
Full-Wave Rectified)
Electrical
For Strobes
Voltages: Regulated 12 DC/FWR and
Regulated 24 DC/FWR
Operational Voltage Ranges: 8-17.5 Volts and 16-33 Volts
Synchronous Applications
with MDL Module: 9-17.5 Volts and 17-33 Volts
Flash Rate: 1 flash per second
Operating Temperature: 32° F to 120° F (0° C to 49° C)
Storage Temperature: –20°C to 70°C
Operational Humidity Range: 10 – 93% RH (non-condensing)
Selectable Light Outputs: All candelas are selectable
via a manual slide switch.
12/24 Volt Applications: 15 or 15/75 candela
24 Volt Application: 15,15/75, 30, 75, 110 candela
15/75 is listed at 15 candela per UL 1971 but will pro
vide 75 candela on axis (straight ahead). 15, 30, 75,
or 110 are rated for that candela.
Maximum Supervisory
Voltage (Speaker): 50 VDC
Sound Output:
Sound output levels are established at Underwriters
Laboratories in their reverberant room. Always use
the sound output specified as UL Reverberant Room
when comparing products.
Listings: UL S5512 (Strobe);
UL S4048 (Speaker/Strobe)
Note for Strobes: Do not exceed; 1) 8-17.5 or 16-33 voltage
range limit; 2) maximum number of 70 strobe lights when
connecting the MDL Sync module with a maximum line impedance of 4 ohms per loop and; 3) maximum line impedance as required by the fire alarm control manufacturer.
NOTE: The SP3 Series is suitable for dry and damp
environments.
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
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NOTICE: This manual shall be left with the owner/user of
this equipment.
General Description
The SpectrAlert SP3 series speaker/strobes are designed to
meet the requirements of most agencies governing these
devices, including: NFPA, ADA, The National Fire Alarm
Code, UL, CSFM, MEA. Also, check with your local Authority Having Jurisdiction for other codes or standards that
may apply.
The SpectrAlert SP3 series speakers can be operated with
distribution amplifiers having an output voltage of either
25 volts or 70.7 volts.
The speakers operate at any one of four input power levels.
The output sound level is selected at the time of installation, but can be changed, if necessary.
The speaker is also equipped with a capacitive input to allow for DC supervision.
The SpectrAlert SP3 series strobe can be installed in systems
using 12 or 24-volt panels having DC or full-wave rectified
(FWR) power supplies. The strobes can also be installed
in applications requiring synchronization (module MDL or
compatible equivalent required) or applications that do not
require synchronization (no module required).
Power Supply Considerations For Strobes
Panels typically supply DC filtered voltage or FWR (fullwave rectified) voltage. The system design engineer must
calculate the number of units used in a zone based on the
type of panel supply. Be certain the sum of all the device
currents do not exceed the current capability of the panel.
Calculations are based on using the device current found
in Table 2 and must be the current specified for the type of
panel power supply used.
Wire Sizes
The designer must be sure that the last device on the circuit
has sufficient voltage to operate the device within its rated
voltage. When calculating the voltage available to the last
device, it is necessary to consider the voltage drop due to
the resistance of the wire. The thicker the wire, the smaller
the voltage drop. Generally, for purposes of determining the
wire size necessary for the system, it is best to consider all
of the devices as “lumped” on the end of the supply circuit
(simulates “worst case”).
Typical wire size resistance:
18 AWG solid: Approximately 8 ohms/1,000 ft.
16 AWG solid: Approximately 5 ohms/1,000 ft.
14 AWG solid: Approximately 3 ohms/1,000 ft.
12 AWG solid: Approximately 2 ohms/1,000 ft.
D900-42-00 1 I56-2811-000R
Example: Assume you have 10 devices on a zone and each
TO NEXT
STROBE OR EOL
INPUT FROM
POWER SUPPLY
INPUT FROM
AMPLIFIER
TO NEXT
SPEAKER OR EOL
STROBESPEAKER
25.0V
70.7V
2W
1W
1/2W
1/4W
25.0V
70.7V
2W
1W
1/2W
1/4W
CORRECT
SW1
SW1
INCORRECT
CAUTION
requires 50 mA average and 2000 Ft. of 14 AWG wiring (total length=outgoing+return). The voltage at the end of the
loop is 0.050 amps per device × 10 devices × 3 ohms/1,000
ft. × 2000 ft =3 volts drop.
The same number of devices using 12 AWG wire will produce only 2 volts drop. The same devices using 18 AWG
wire will produce 8 volts drop. Consult your panel manufacturer’s specifications, as well as SpectrAlert’s operating
voltage range to determine acceptable voltage drop.
Note: If class “A” wiring is installed, the wire length may be
up to 4 times the single wire length in this calculation.
Installation
All wiring must be installed in compliance with the National Electrical Code (NEC) and applicable local codes as
well as special requirements of the authority having jurisdiction, using the proper wire size. This also includes all
applicable NFPA Standards, ANSI/UL 1480, UL 1971 and
NEC 760.
Electrical
1. Connect the speaker/strobe as shown in Figure 1. Keep
in mind that even though the speaker and strobe are
a single mechanical unit, they are electrically independent and require separate power sources.
NOTE: Do NOT loop electrical wiring under terminal
screws. Wires connecting the device to the control panel
must be broken at the device terminal connection in order
to maintain electrical supervision.
Figure 1. Electrical connections:
2. See Figure 2 as an example of how to select a 1⁄4 Watt
input when a 25 volt amplifier is being used. Notice that
the header, SW1, has two shunts. One shunt is used to select either 25 or 70.7 volts input. The other shunt is used
to select input power of 1⁄4, 1⁄2, 1 or 2 Watts. Table 1
lists the UL reverberant and anechoic output sound levels
for each power tap on the SP3 series speaker/strobes.
Figure 2. Speaker Voltage and Power Selection:
A0102-00
Table 1. Sound levels for each transformer power tap:
UL
2W 1W 1/2W 1/4W
Reverberent
(dBS @10 ft.)
89 87 84 81
Signal levels exceeding 130% rated signal voltage can damage the speaker. Consequently, an incorrect tap connection
may cause speaker damage. This means that if a 25V tap
is selected when a 70.7V amplifier is being used, speaker
damage may result. Therefore, be sure to select the proper
taps for the amplifier voltage/input power level combination being used.
A0101-00
NOTE: Supply power for strobe must be continuous for
proper operation.
Table 2. Strobe current draw measurements – 12/24 Volt applications:
NOTE: All models were only tested at the 8-17.5 and 16-33 Volt-FWR/DC limits. This does not include the 80% low-end
or 110% high-end voltage limits.
Model No.
Speaker/Strobe
SP3R1224MC
SP3W1224MC
D900-42-00 2 I56-2811-000R
Candela
Setting
15 112 64 127 59
15/75 135 74 127 69
30 93 90
75 158 160
110 208 209
FWR Operating
Current–Strobe
(mA RMS)
12V 24V 12V 24V
DC Operatng
Current–Strobe
(mA RMS)
4-INCH
B
ACK BOX
SNAP LEVER
LOCKING RIBLOCKING RIB SLOT
INSERT REMOVAL TOOL
Candela Selections:
Viewing Window
WARNING
Figure 3. For strobe candela selections, adjust slide
switch located on the rear of the product while
watching the viewing window on the side of the
reflector.
A0133-00
NOTE: SpectrAlert Selectable Output strobes, set at 15 and 15/75cd,
automatically work on both 12V and 24V power supplies.
NOTE: The strobe is not listed for 12V operating voltages
when set to 30, 75 or 110 candela. Use only those settings
marked as OK in this chart:
Permissible Candela Settings:
Candela
Setting
15 OK OK
15/75 OK OK
30 OK
75 OK
110 OK
Operating Voltage
12V 24V
C. Plug the remaining two holes that will not be used for
attachment with the plugs provided.
NOTE: Two drywall screws (provided) may be used to fasten
the mounting plate to the wall. To use the drywall screws,
it will be necessary to first remove the strobe and hinge the
strobe module away from the mounting plate (Fig. 7).
Figure 4: Reversible strobe module
A0105-01
Figure 5: Flush mount back box
A0106-00
When using a 12V panel, this device will yield required
light output only in the 15 or 15/75 candela setting.
Mounting
Reversible strobe module
Should the back box be located near an obstruction such as
a doorway, the strobe module is field-reversible (Fig. 4).
To reverse the strobe module: first remove the strobe from
the mounting plate (Fig. 6). Turn the module so that it is
upside down from its original position, re-insert the module into the mounting plate (be sure to insert the Locking
Tab into the slot), and press the module into the mounting
plate. The strobe module will make a “click” when it has
locked into place. Turn the entire assembly so that the word
“FIRE” is right side up. The unit can now be mounted.
Flush mount back box
The speaker/strobe can be flush mounted on a
4˝×4˝× 21/8˝ back box (Fig. 5) as follows:
A. Select the appropriate pair of diagonally opposite mount-
ing holes in the speaker grille that will be used to attach
the speaker/strobe to the back box. Do not insert any
mounting screws at this point.
B. Use two 8-32 × 13/4˝ pan head screws to attach the
speaker to the back box.
Figure 6. Removal of strobes from mounting plates
To remove units from mounting plates, insert Quick Click
Removal Tool as shown to unlock snap. While pushing in
Removal Tool to release the snap, pull back on the strobe.
Hinge the strobe module, disengage the Locking Rib, and
lift the strobe away from the mounting plate.
A0100-00
D900-42-00 3 I56-2811-000R
WARNING
Surface mount with BBS-SP2 back box skirt
4-INCH BACK BOX
DRYWALL SCREWS
(OPTIONAL)
BBS-SP2
DRYWALL
SCREWS
(OPTIONAL)
LOCKING RIB SLOT
An optional back box skirt is available to provide a finished
appearance. Mount the skirt to the back box using the mounting screws provided with the speaker/strobe as follows:
A. Use the two 8-32 × 13/4˝ pan head screws to attach the
speaker to the back box.
B. Plug the two holes that will not be used for attachment,
using plugs provided.
Figure 6: Surface mount with BBS-SP2 back box skirt
NOTE: Two drywall screws (provided) may be used to fasten the BBS-SP2 to the wall.
NOTE: The back box or back box with extension ring combination must be 4˝ × 4˝ and a minimum of 21/8˝ deep if
using a BBS-SP2.
NOTE: To surface mount the SP3 series speaker/strobe, the
minimum depth required in the back box/extension ring
combination, is 25/8˝.
Please refer to insert for the Limitations of Fire Alarm Systems
The Limitations of Speaker/Strobes
If either of the voltage select or power select shunts is not plugged into
one of the appropriate option positions, the speaker will not sound and
there will be no trouble indication at the panel. Always make sure that the
individual speakers are tested after installation per NFPA regulations.
The speaker may not be heard. The loudness of the speaker meets (or exceeds) the current Underwriters Laboratories’ standards. However, the
speaker may not attract the attention of a sound sleeper or one who has
recently used drugs or has been drinking alcoholic beverages. The speaker
may not be heard if it is placed on a different floor from the person in hazard or if placed too far away to be heard over the ambient noise. Traffic,
air conditioners, machinery, or music appliances may prevent even alert
persons from hearing the alarm. The speaker may not be heard by persons
who are hearing impaired.
Three-Year Limited Warranty
System Sensor warrants its enclosed speaker/strobe to be free from defects in materials and workmanship under normal use and service for a period of three years
from date of manufacture. System Sensor makes no other express warranty for this
speaker/strobe. No agent, representative, dealer, or employee of the Company has
the authority to increase or alter the obligations or limitations of this Warranty. The
Company’s obligation of this Warranty shall be limited to the repair or replacement
of any part of the speaker/strobe which is found to be defective in materials or
workmanship under normal use and service during the three year period commenc
ing with the date of manufacture. After phoning System Sensor’s toll free number
800-SENSOR2 (736-7672) for a Return Authorization number, send defective units
Figure 7: Mounting to irregular surfaces
The signal strobe may not be seen. The electronic visual warning signal
uses an extremely reliable xenon flash tube. It flashes at least once every
second. The strobe must not be installed in direct sunlight or areas of high
light intensity (over 60 foot candles) where the visual flash might be disregarded or not seen. The strobe may not be seen by the visually impaired.
The signal strobe may cause seizures. Individuals who have positive
photoic response to visual stimuli with seizures, such as persons with epi
lepsy, should avoid prolonged exposure to environments in which strobe
signals, including this strobe, are activated.
The signal strobe cannot operate from coded power supplies. Coded
power supplies produce interrupted power. The strobe must have an un
interrupted source of power in order to operate correctly. System Sensor
recommends that the horn and signal strobe always be used in combina
tion so that the risks from any of the above limitations are minimized.
postage prepaid to: System Sensor, Returns Department, RA #__________, 3825
Ohio Avenue, St. Charles, IL 60174. Please include a note describing the malfunction
and suspected cause. The Company shall not be obligated to repair or replace units
which are found to be defective because of damage, unreasonable use, modifica
tions, or alterations occurring after the date of manufacture. In no case shall the
Company be liable for any consequential or incidental damages for breach of this or
any other Warranty, expressed or implied whatsoever, even if the loss or damage is
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caused by the Company’s negligence or fault. Some states do not allow the exclu
sion or limitation of incidental or consequential damages, so the above limitation or
exclusion may not apply to you. This Warranty gives you specific legal rights, and
you may also have other rights which vary from state to state.
A0107-00
A0108-00
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SpectrAlert Speaker/Strobes have been tested and found to comply
with the limits for a Class B digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not
FCC Statement
installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required
to correct the interference at his own expense.
D900-42-00 4 I56-2811-000R
©2005 System Sensor
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