INSTALLATION AND MAINTENANCE INSTRUCTIONS
Low Frequency Sounder/Strobes
3825 Ohio Avenue, St. Charles, Illinois 60174
800/736-7672, FAX: 630/377-6495
www.systemsensor.com
SS-120-006 1 I56-3889-000R
For use with the following models: P2RH-LF, P2WH-LF, HR-LF, HW-LF
PRODUCT SPECIFICATIONS
Operating Temperature: 32°F to 120°F (0°C to 49°C)
Humidity Range: 10 to 93% Non-condensing
Strobe Flash Rate: 1 flash per second
Nominal Voltage (Low Frequency Sounder): Regulated 12VDC/FWR or regulated 24VDC/FWR
Nominal Voltage( Low Frequency Sounder/Strobe): Regulated 24VDC/FWR
Operating Voltage Range (includes fire alarm panels with built in sync): 8 to 17.5V (12V nominal) or 16 to 33V (24V nominal)
Operating Voltage with MDL3 Sync Module: 8.5 to 17.5V (12V nominal) or 16.5 to 33V (24V nominal)
Input terminal wire gauge: 12 to 18 AWG
DIMENSIONS FOR PRODUCTS AND ACCESSORIES
PRODUCTS LENGTH WIDTH DEPTH
Low Frequency Sounder/Strobes (including lens)
6.4˝ 4.7˝ 2.5˝
162 mm 119 mm 64 mm
Low Frequency Sounder
5.6˝ 4.7˝ 1.3˝
142 mm 119 mm 33 mm
Low Frequency Sounder Strobe with SBBR/SBBW Surface Mount Back Box
6.4˝ 4.7˝ 4.3˝
162 mm 120 mm 108 mm
Low Frequency Sounder with SBBR,
SBBW Surface Mount Back Box Length 5.7˝
5.7˝ 4.8˝ 3.0˝
145 mm 120 mm 76 mm
MOUNTING BOX OPTIONS
2-Wire Indoor Products
4 × 4 × 1
1
/2, Single Gang, Double Gang, 4˝ Octagon
GENERAL DESCRIPTION
The SpectrAlert Advance low frequency series of notification appliances offers
a range of low frequency sounder and low frequency sounder/strobe products
for wall and ceiling applications. Studies have shown that low frequency audi-
ble devices that operate around 520Hz are more effective in waking individuals
in sleeping areas. The sounder only version is designed for use in 12 or 24 volt,
DC or FWR (full wave rectified) systems. Sounder/Strobe versions are only
to be used with 24 volt, DC or FWR systems. These products are electrically
backward compatible with the previous generation of SpectrAlert notification
appliances. The 2-wire products fit systems where a single NAC controls both
sounder and strobe. The System Sensor MDL3 module may be used to provide
synchronization.
Models are approved for wall and ceiling installations.
FIRE ALARM SYSTEM CONSIDERATIONS
The National Fire Alarm Code, NFPA 72, requires that all sounders, used for
building evacuation produce temporal coded signals. Signals other than those
used for evacuation purposes do not have to produce the temporal coded sig-
nal. The National Fire Alarm Code, NFPA 72, will require effective Jan. 1, 2014
that audible appliances installed in sleeping areas produce a low frequency
alarm signal that shall be a square wave or provide equivalent awakening abil-
ity. System Sensor recommends spacing notification appliances in compliance
with NFPA 72.
LOOP DESIGN AND WIRING
The system designer must make sure that the total current drawn by the de-
vices on the loop does not exceed the current capability of the panel supply,
and that the last device on the circuit is operated within its rated voltage. The
current draw information for making these calculations can be found in the
tables within this manual. For convenience and accuracy, use the voltage drop
calculator on the System Sensor website (systemsensor.com/volt).
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. Wire resistance tables can be obtained
from electrical handbooks. Note that if Class A wiring is installed, the wire
length may be up to twice as long as it would be for circuits that are not
fault tolerant.
NOTE: The total number of strobes on a single NAC must not exceed 40 for
24 volt applications or 12 for 12 volt applications. Loop resistance on a single
NAC should not exceed 120 ohms for 24 volt and 30 ohms for 12 volt systems.
The sounder and strobe circuits must be wired independently, and each circuit
must be terminated with the appropriate EOL device. Removal of a notifica-
tion device will result in an open circuit indication on the strobe loop.
NOTE: A shorting spring is provided between terminals 2 and 3 of the mount-
ing plate to enable wiring checks after the system has been wired, but prior
to installation of the final product. This spring will automatically disengage
when the product is installed, to enable supervision of the final system.
I56-3889-000R
NOTICE: This manual shall be left with the owner/user of this equipment.
(2 pages)
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