System Sensor SpectrAlert SP2R1224MC User manual

SpectrAlert Selectable Output Series
Wall Speaker/Strobes for
Fire Protective Signaling Systems
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: [phone]
www.systemsensor.com
NOTICE: This manual shall be left with the owner/user of
this equipment.
General Description
The SpectrAlert SP2 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 SP2 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 installa-
tion, but can be changed, if necessary.
The speaker is also equipped with a capacitive input to
allow for DC supervision.
The SpectrAlert SP2 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).
D900-29-00 1 I56-1809-006R
For use with models: SP2R1224MC and SP2W1224MC.
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
Specifications: Speaker
Mechanical
Input Terminals: 12 to 18 AWG (3.31 to 0.82 mm2)
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
NOTE: Horn/strobe units will operate on walk tests with
on-time durations of .25 sec. or greater.
Flash Rate: 1 flash per second
Operating Temperature: 32° F to 120° F (0° C to 49° C)
Selectable Light Outputs: All candelas are selectable
via a manual slide switch.
12/24 Volt Applications: 15 or 15/75 candela
24 Volt Application: 30, 75, 110 candela
15/75 is listed at 15 candela per UL 1971 but will provide
75 candela on axis (straight ahead). 15, 30, 75, or 110 are
rated for that candela.
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 S4011
(Combo)
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 imped-
ance as required by the fire alarm control manufacturer.
Power Supply Considerations For Strobes
Panels typically supply DC filtered voltage or FWR (full-
wave 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 less 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.
The models SP2R1224MC and SP2W1224MC incorporate a new patent-pending voltage booster design that has a more consistent flash bulb voltage over the
range of candela selections. The benefit to the customer is a high quality strobe device.

CAUTION
Signal levels exceeding 130% rated signal voltage can dam-
age 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 combina-
tion being used.
2 W 1 W 1/2 W 1/4 W
84 81 78 75
UL
Reverberant
(dBA @ 10 ft.)
2 W 1 W 1/2 W 1/4 W
87 84 81 78
Anechoic
(dBA @ 10 ft.)
Figure 2. Speaker Voltage and Power Selection:
25.0V
70.7V
2W
1W
1/2W
1/4W
25.0V
70.7V
2W
1W
1/2W
1/4W
CORRECT
SW1
SW1
INCORRECT
Table 1. Sound levels for each transformer
power tap:
D900-29-00 2 I56-1809-006R
A0101-00
A0102-00
A0103-00
Example: Assume you have 10 devices on a zone and each
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 pro-
duce only 2 volts drop. The same devices using 18 AWG
wire will produce 8 volts drop. Consult your panel manu-
facturer’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:
TO NEXT
STROBE OR EOL
INPUT FROM
POWER SUPPLY
INPUT FROM
AMPLIFIER
TO NEXT
SPEAKER OR EOL
STROBESPEAKER
NOTE: Supply power for strobe must be continuous for
proper operation.
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 SP2 series speaker/strobes.
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.
Candela
Setting
FWR Operating
Current–Strobe
(mA RMS)
DC Operatng
Current–Strobe
(mA RMS)
12V 24V 12V 24V
SP2R1224MC
Speaker/Strobe
15 112 64 127 59
15/75 135 74 127 69
30 93 90
75 158 160
110 208 209

Viewing Window
D900-29-00 3 I56-1809-006R
Figure 5: Flush mount back box
Figure 4: Reversible strobe module
A0105-01
A0133-00
4-INCH BACK BOX
A0106-00
Candela Selections:
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.
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.
SNAP LEVER
LOCKING RIB
LOCKING RIB SLOT
INSERT REMOVAL TOOL
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
Operating Voltage
12V 24V
15 OK OK
15/75 OK OK
30 OK
75 OK
110 OK
WARNING
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 mod-
ule 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.
A0100-00
B. Use two 8-32 × 13/4″ pan head screws to attach the
speaker to the back box.
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 fas-
ten 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).

D900-29-00 4 I56-1809-006R
©System Sensor 2003
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 work-
manship under normal use and service during the three year period com-
mencing 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 postage prepaid to: System Sensor, Returns
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
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 haz-
ard 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.
The Limitations of Speaker/Strobes
WARNING
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 disre-
garded 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
uninterrupted 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.
Please refer to insert for the Limitations of Fire Alarm Systems
Surface mount with BBS-SP2 back box skirt
An optional back box skirt is available to provide a finished
appearance. Mount the skirt to the back box using the mount-
ing 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.
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 com-
bination must be 4″ × 4″ and a minimum of 21/8″
deep if using a BBS-SP2.
NOTE: To surface mount the SP2 series speaker/strobe,
the minimum depth required in the back box/
extension ring combination, is 25/8″.
Figure 6: Surface mount with SP2-BBS back box skirt
Figure 7: Mounting to irregular surfaces
4-INCH BACK BOX DRYWALL SCREWS
(OPTIONAL)
BBS-SP2
A0107-00
DRYWALL
SCREWS
(OPTIONAL)
LOCKING RIB SLOT
A0108-00
FCC Statement
frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communica-
tions. 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.
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 caused by the Company’s negligence or fault.
Some states do not allow the exclusion or limitation of incidental or con-
sequential 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.
Three-Year Limited Warranty