SpectrAlert SP2 Series
Wall Speaker/Strobes for
Fire Protective Signaling Systems
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
NOTICE:
This manual shall be left with the owner/user of
this equipment.
General Description
The National Fire Protection Association (NFPA) has pub-
lished standards and recommended practices for the
speaker/strobes described in this manual. As a result, the
installer must be familiar with these requirements as well
as all local codes and special requirements of the authority
having jurisdiction.
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 al-
low for DC supervision.
The SpectrAlert SP2 series strobe can be installed in
systems using 24-volt panels having DC or full-wave
rectified (FWR) power supplies. The strobes can also be
installed in applications requiring synchronization (MDL
required) or applications that do not require
synchronization (no module required).
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 Au-
thority Having Jurisdiction for other codes or standards
that may apply.
Power Supply Considerations For Strobes
Panels typically supply DC filtered voltage or FWR (full-
Specifications: Speaker
Mechanica
l
Input Terminals:
12 to 18 AWG (3.31 to 0.82 mm
2
)
Speaker Size:
4 inches (101 mm)
Overall Dimensions: 8.25” x 4.9”
Electrical
Voltage Input:
25 volts or 70.7 volts (nominal)
Frequency Range:
400 - 4000 Hz
Power:
1/4, 1/2, 1 and 2 Watts
Operating
Temperature Range: 32
°
to 120
°
F (0
°
to 49
°
C)
Listings:
UL
D690-01-00
1
I56-1368-001
For use with the following models: SP2R2415, SP2R2430, SP2R241575, SP2R2475, SP2R24110,
SP2W2415, SP2W2430, SP2W241575, SP2W2475, SP2W24110
Specifications: Strobe
Voltage Range: DC or Full-Wave Rectified
20 to 30 volts, (21 to 30 with MDL module)
Flash Rate:
1 flash per second
Light Output:
Models with 1575 are listed at 15 candela
per UL1971 but will provide 75 candela
on axis (straight ahead).
Models with 15, 30, 75 or 110 are rated for
that candela.
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.
Example: Assume you have 10 devices on a zone and each
requires 50 mA average and 2000 Ft. of 14 AWG wiring (to-
tal length=oureturn). The voltage at the end of
the loop is 0.050 amps per device x 10 devices x 3 ohms/
1,000 ft. x 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
manufacturer’s specifications, as well as SpectrAlert’s oper-
ating voltage range to determine acceptable voltage drop.
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