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dn-6941:a1 • 8/23/07 — Page 1 of 4
SpectrAlert®
Sele c ta ble Out put P1224 MC Horns/St robes,
S12 2 4 MC St robes, & H1 2/2 4 H orns
Audio/Visual De vices
dn-6941:a1
S1224MC Strobe
P1224MC Horn/Strobe
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Gene ra l
System Sensor® SpectrAlert® Selectable Output Horns,
Strobes, and Horn/Strobes offer enhanced features that
include the widest range of candela options available and the
capability to recognize and self-adjust for either 12- or 24-volt
operation. With an overall feature set that combines perfor-
mance, installation ease, flexibility, and a consistent, aestheti-
cally pleasing appearance, the SpectrAlert Selectable Output
devices provide both the innovation and efficiency synony-
mous with the SpectrAlert name.
Performance. SpectrAlert selectable output wall-mount horns,
strobes, and horn/strobes offer key performance features long
associated with the SpectrAlert name. The selectable-candela
strobes and horn/strobes offer average current draws that are
not only lower than conventional fixed-candela SpectrAlert
products, but also lower than similar selectable-candela prod-
ucts. By consuming less current, the ability to connect even
more devices per loop is possible, resulting in a lower installed
cost.
Installation. SpectrAlert selectable output horns, strobes, and
horn/strobes offer the same installation-friendly features syn-
onymous with the SpectrAlert name, such as the option of two-
and four-wire operation; the ability to use standard-sized back-
boxes with no encroachment into the box; and universal
mounting incorporating the labor-saving QuickClick™ feature.
Such labor-saving features make wire connections simple and
fast, further reducing installed cost.
Flexibility. SpectrAlert selectable output strobes and horn/
strobes offer the broadest range of candela options. In addi-
tion, the selectable output strobes and horn/strobes can oper-
ate on either 12 V or 24 V, with no setting required; the device
recognizes and self-adjusts to the correct current automati-
cally. Temporal 3 or Continuous tone options continue to be
available, in either an Electromechanical or 3 kHz pattern.
Aesthetics. SpectrAlert selectable output horns, strobes, and
horn/strobes incorporate the same stylish, low-profile design
of the conventional SpectrAlert products, for a consistent and
aesthetically pleasing appearance across the entire product
line.
Features
• Operate on either 12 V or 24 V.
• Widest range of candela options:
• 12 V: 15 and 15/75 candela.
• 24 V: 15, 15/75, 30, 75, 110 candela.
• Easy candela selection.
• Lower current draw.
• Easy DIP switch selection for horn options.
• Easy mounting with QuickClick.
• Synchronizable with MDL Sync•Circuit™ module.
• Meets UL 1971, NFPA 72, and ADA signaling requirements.
NOTE: All strobe and horn/strobe models incorporate a new pat-
ented 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.
Enginee ring Specific a t ions
SpectrAlert horns, strobes and horn/strobes shall be capable
of mounting to a standard 4.0" x 4.0" x 1.5" (10.16 x 10.16 x
3.81 cm) backbox or a single-gang 2.0" x 4.0" x 1.875" (5.08 x
10.16 x 4.763 cm) backbox using the universal mounting plate
included with each SpectrAlert product. Also, SpectrAlert prod-
ucts, when used in conjunction with the accessory Sync•Cir-
cuit Module, shall be powered from a non-coded power supply
and shall operate on 12 or 24 volts. 12-volt rated devices shall
have an operating voltage range of 9 –17.5 volts. 24-volt rated
devices shall have an operating voltage range of 17 – 33 volts.
SpectrAlert products shall have an operating temperature of
32° to 120°F (0°C to 49°C) and operate from a regulated DC
or full-wave-rectified, unfiltered power supply.
STROBE
Strobe shall be a System Sensor SpectrAlert Model _______
listed to UL 1971 and be approved for fire protective service.
The strobe shall be wired as a primary signaling notification
appliance and comply with the Americans with Disabilities Act
requirements for visible signaling appliances, flashing at 1 Hz
over the strobe’s entire operating voltage range. The strobe
light shall consist of a xenon flash tube and associated lens/
reflector system.
HORN/STROBE COMBINATION
Horn/Strobe shall be a System Sensor SpectrAlert Model
_______ listed to UL 1971 and UL 464 and shall be approved
for fire protective service. Horn/strobe shall be wired as a pri-
mary signaling notification appliance and comply with the
Americans with Disabilities Act requirements for visible signal-
ing appliances, flashing at 1 Hz over the strobe’s entire operat-
ing voltage range. The strobe light shall consist of a xenon
flash tube and associated lens/reflector system. The horn shall
have two tone options, two audibility options (at 24 volts) and
the option to switch between a Temporal 3 pattern and a Non-
Temporal Continuous pattern.
Strobes shall be powered independently of the sounder with
the removal of factory-installed jumper wires. The horn on
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