SpectrAlert SP2 Series
Wall Speaker/Strobes for
Fire Protective Signaling Systems
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
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 speak-
er/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
allow 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 appli-
cations requiring synchronization (MDL required) or appli-
cations 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
Authority Having Jurisdiction for other codes or standards
that may apply.
Power Supply Considerations For Strobes
Panels typically supply DC filtered voltage or FWR (full-
wave rectified) voltage. The system design engineer must
D690-01-00
1
I56-1368-005R
For use with the following models: SP2R2415, SP2R2430, SP2R241575, SP2R2475, SP2R24110,
SP2W2415, SP2W2430, SP2W241575, SP2W2475, SP2W24110
U.S. Patent Nos. 5,593,569; 5.914,665; 5,850,178; 5,598,139; 6,049,446; 6,127,935
Specifications: Speaker
Mechanical
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 S4048 (Speaker/Strobe), S5512 (Strobe)
Note for Strobes: Do not exceed 1) 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.
Specifications: Strobe
Voltage Range: DC or Full-Wave Rectified
20 to 30 volts, (21 to 30 volts 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.
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 cir-
cuit 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 consid-
er 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
(total length=oreturn). 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.
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