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Page 2 of 4 — dn-6941:a1 • 8/23/07
horn/strobe models shall operate on a coded or non-coded
power supply (the strobe must be powered continuously).
SYNCHRONIZATION MODULE
Module shall be a System Sensor Sync•Circuit _______ listed
to UL 464 and shall be approved for fire protective service. The
module shall synchronize SpectrAlert strobes at 1 Hz and
horns at Temporal 3. Also, the module shall silence the horns
on horn/strobe models, while operating the strobes, over a sin-
gle pair of wires. The module shall be capable of mounting to a
4.688" × 4.688" × 2.125" (11.906 x 11.906 x 5.398 cm) back-
box and shall control two Style Y (Class B) or one Style Z
(Class A) circuit. Module shall be capable of multiple zone syn-
chronization by daisy-chaining multiple modules together and
re-synchronizing each other along the chain. The module shall
not operate on a coded power supply.
Ope ra t ing Specific a t ions
Walk test: SpectrAlert horn/strobe and horn-only work on
“walk tests” with time durations of 4 seconds or greater.
Input terminals: 12 to 18 AWG (3.31 to 0.821 mm²).
Dimensions: strobe and horn/strobe with universal plate:
5.0" x 5.625" x 2.938" (12.7 x 14.288 x 7.461 cm); strobe and
horn/strobe with small-footprint plate: 3.375" x 5.625" x
2.313” (8.573 x 14.288 x 5.874 cm); horn with universal
mounting plate: 5.0" x 5.625" x 1.313" (12.7 x 14.288 x 3.334
cm); horn without mounting plate: 2.938" x 5.313" x 1.313"
(7.461 x 13.494 x 3.334 cm).
Weight, horn only: 7.2 oz. (204.117 g).
Weight, strobe and horn/strobe: 8.8 oz. (249.476 g).
Mounting: standard boxes 4.0" x 4.0" x 1.5" (10.16 x 10.16 x
3.81 cm) or 2.0" x 4.0" x 1.875" (5.08 x 10.16 x 4.763 cm).
Operating temperature (indoor): 32°F to 120°F (0°C to
49°C).
Maximum humidity (indoor): 95% as tested per UL 464.
Operating temperature (K Series, outdoor): –40°F to 151°F
(–40°C to 66°C).
Outdoor rating: NEMA 3R (per UL 50).
Voltages: 12 or 24 VDC and FWR unfiltered. NOTE: Full
Wave Rectified (FWR) voltage is a non-regulated, time-varying
power source that is used on some power supply and panel
outputs.
Operating voltage range: 12 V: 8 – 17.5 V; 24 V: 16 – 33 V.
Operating voltage range with Sync•Circuit module MDL:
12 V: 9 – 17.5 V; 24 V: 17 – 33 V. NOTE: The MDL causes a
one-volt voltage drop in the notification appliance circuit.
Explanation of published voltage, current, and SPL speci-
fications: In May 2004, Underwriters Laboratories changed
standard UL 1971 to require that operating current measure-
ments are made using RMS (root mean square) instead of
peak or average values. RMS measurements more accurately
predict the power consumption of a device since they take into
account the entire current draw profile including surge, repeti-
tive surge, and peak values. The published RMS current is the
maximum operating current of that device within its operating
voltage range. This current maximum may or may not occur at
the endpoints of the voltage range. Similarly, UL tests the audi-
bility of devices in accordance with UL 464 by measuring them
across the operating voltage range to determine the minimum
sound pressure level produced at any particular setting.
During May 2004, UL also changed the way they list the volt-
age range of a device. All 12 V products will be listed between
8 – 17.5 V and all 24 V products will be listed between 16 – 33
V. Those devices are considered “regulated.” Any product that
does not operate within these ranges will be listed as a “spe-
cial application” with its operating voltage specified on the
device.
U.S. Patent numbers: 5,593,569. 5,914, 665. 6,049,446.
Curre nt Dra w Table s
NOTE: 1) Current draw for strobe-only products is shown in Table
1-A. 2) Current draw for horn-only products is shown in Table 1-B.
3) 12 VDC two-wire horn/strobe current is shown in Table 1-C. 4)
24 VDC two-wire horn/strobe current draw is shown in Table 1-D.
5) Current draw for other horn/strobe power supplies can be
calculated by adding the strobe current in Table 1-A to the horn
current in Table 1-B from the chosen settings.
Current Dra w Table 1 -A:
STROBE, U L M a x imum (m A RM S)
Candela
Setting
FWR Operating
Current, STROBE
(mA RMS)
DC Operating
Current, STROBE
(mA RMS)
8 – 17.5 V 16 – 33 V 8 – 17.5 V 16 – 33 V
15 112 64 127 59
15/75 135 74 127 69
30
93 90
75
158 160
110
208 209
Current draw tables continued on next page.
Spe ctrAle rt Strobe
Cande la Se le c t ions
For strobe candela selection, adjust slide switch
located on the rear of the product while watching the
viewing window on the side of the reflector.
Permissible candela settings:
For 12 V operating voltage: 15 or 15/75.
For 24 V operating voltage: 15, 15/75, 30, 75, 110.
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