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I56-6516-002
10/02/2018
BEFORE INSTALLING
Please read the System Sensor Audible Visible Application Reference Guide,
which provides detailed information on notification devices, wiring and
special applications. Copies of this manual are available from System Sensor.
NFPA 72 and NEMA guidelines should be observed.
Important:
The notification appliance used must be tested and maintained
following NFPA 72 requirements.
GENERAL DESCRIPTION
System Sensor series of notification appliances offer a wide range of audible
and visible devices for life safety notification. Our 4-wire horn strobes come
with 10 field selectable tone and volume combinations and 7 field selectable
candela settings. Intended for indoor applications and approved for ceiling
mount installations.
4-wire horn strobes and strobes are public mode notificati2on appliances in-
tended to alert occupants of a life safety event. The horn is listed to ANSI/
UL 464 requirements (public mode) and the strobe is listed to ANSI/UL 1638
(public mode).
System Sensor strobes are designed to be used in 12 VDC, 24VDC, or 24V FWR
(full wave rectified) systems. System Sensor AV devices can be activated by a
compatible fire alarm control panel or power supply. Refer to the appropriate
fire alarm control panel manufacturer or power supply for more information.
System Sensor ceiling 4-wire horn strobes are electrically backward compat-
ible with the previous generation, since 1996, of notification appliances. They
come enabled with System Sensor synchronization protocol which requires
connections to a power supply capable of generating the System Sensor syn-
chronization pulses, a FACP NAC output configured to System Sensor synchro-
nization protocol, or the use of MDL3 module to generate the synchronization
protocol.
FIRE ALARM SYSTEM CONSIDERATIONS
The National Fire Alarm and Signaling Code, NFPA 72, requires that all noti-
fication appliances, used for building evacuation installed after July 1, 1996,
produce temporal coded signals. Signals other than those used for evacuation
purposes do not have to produce the temporal coded signal. System Sensor
recommends spacing notification appliances in compliance with NFPA 72.
SYSTEM DESIGN
The system designer must make sure that the total current draw by the devices
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 the manual. For convenience and accuracy, use the voltage drop
calculator on the System Sensor website (www.systemsensor.com).
When calculating the voltage available to the last device, it is necessary to
consider the voltage due to the resistance of the wire. The thicker the wire, the
smaller the voltage drop. Wire resistance tables can be obtained from electri-
cal 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.
The total number of strobes on a single NAC must not exceed 69 for 24 volt
applications.
AVAILABLE TONES
System Sensor offers a wide variety of tones for your life safety needs, includ-
ing temporal 3 pattern (½ second on, ½ second off, ½ second on, ½ second
off, ½ second on, 1½ off and repeat) which is specified by ANSI and NFPA 72
for standard emergency evacuation signaling.
To select the tone, turn the rotary switch on the back of the product to the
desired setting. (See Figure 1.)
Available horn settings can be found in Table 1.
NOTE: The standard mini-horn sound is 3.1 kHz. The legacy sound of the
SpectrAlert Advance line is EM (Electro-mechanical): this hops frequencies
between 2Hz and 4Hz. For EM Coded positions, temporal coding must be
provided by the NAC. If the NAC voltage is held constant, the horn output will
remain constantly on.
FIGURE 1. AUDIO SELECTOR
A0473-00
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Selectable Output
Four-wire Horn Strobes – Ceiling Mount
For use with the following models:
Ceiling Mount Horn Strobes: PC4RL and PC4WL
PRODUCT SPECIFICATIONS
Standard 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:
Regulated 12VDC or regulated 24DC/FWR
Operating Voltage Range:
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
MOUNTING BOX OPTIONS
CEILING PRODUCTS
Diameter
Depth
4-wire Indoor Products
Horn Strobe
6.83"
(173.5mm)
2.47"
(62.7mm)
4" x 4" x 1½", Double Gang,
4" Octagon, SBBCRL/WL (ceiling)
Horn Strobe with SBBCRL/WL Surface Mount
Back Box
6.92"
(175.8mm)
2.50"
(63.5mm)
NOTICE:
This manual shall be left with the owner/user of this equipment.
3825 Ohio Avenue, St. Charles, Illinois 60174
800/736-7672, FAX: 630/377-6495
www.systemsensor.com
I56-65
16-00
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