P83984 E
Sheet 2 of 9
WARNING: OPERATING THE NS AUDIBLE APPLIANCES, SET ON "CODE 3 HORN", LOW dBA AT MINIMUM VOLTAGE
(16.0VDC) WILL NOT MEET THE 75dBA MINIMUM UL REVERBERANT SOUND LEVEL REQUIRED FOR PUBLIC MODE FIRE
PROTECTION SERVICE (NOTED BY * IN TABLE 2). THIS SETTING IS ACCEPTABLE ONLY FOR GENERAL SIGNALING (NON-
FIRE ALARM) USE. USE THE "HIGH" dBA SETTING WITH THIS TONE FOR PUBLIC MODE SERVICE
.
WARNING: FOR ULC VERSIONS THESE APPLIANCES WERE TESTED TO THE OPERATING VOLTAGE OF 20.0-31.0 VOLTS
FOR 24V MODELS USING FILTERED (DC) OR UNFILTERED FULL-WAVE-RECTIFIED (FWR). APPLY 80% AND 110% OF
THESE VOLTAGE VALUES FOR SYSTEM OPERATIONS.
WARNING: FOR UL VERSIONS THESE APPLIANCES WERE TESTED TO THE OPERATING VOLTAGE LIMITS OF 16.0-33.0
VOLTS FOR 24V MODELS USING FILTERED (DC) OR UNFILTERED FULL-WAVE-RECTIFIED (FWR). DO NOT APPLY 80%
AND 110% OF THESE VOLTAGE VALUES FOR SYSTEM OPERATION.
WARNING: CHECK THE MINIMUM AND MAXIMUM OUTPUT OF THE POWER SUPPLY AND STANDBY BATTERY AND
SUBTRACT THE VOLTAGE DROP FROM THE CIRCUIT WIRING RESISTANCE TO DETERMINE THE APPPLIED VOLTAGE TO
THE STROBES.
WARNING: CANDELA SETTING WILL DETERMINE THE CURRENT DRAW OF THE PRODUCT.
UL range rating limits are 16.0-33.0VDC; ULC ratings are 20.0-31.0VDC (tested range -20% below 10% above rated voltage range).
Table 3: UL/ULC Current Ratings (AMPS)
Rated Average Current
Voltage
Voltage 15cd 30cd 75cd 110cd
16.0VDC
20.0VDC
0.080 0.128 0.252 0.328
24.0VDC
24.0VDC
0.054 0.083 0.155 0.187
33.0VDC
31.0VDC
0.045 0.068 0.115 0.141
16.0VRMS 20.0VRMS 0.116 0.194 0.361 0.487
24.0VRMS 24.0VRMS 0.093 0.141 0.231 0.289
33.0VRMS 31.0VRMS 0.094 0.115 0.188 0.224
Rated Peak Current
UL Voltage
ULC Voltage 15cd 30cd 75cd 110cd
16.0VDC
20.0VDC
0.136 0.186 0.360 0.452
24.0VDC
24.0VDC
0.091 0.142 0.250 0.307
33.0VDC
31.0VDC
0.140 0.190 0.306 0.458
16.0VRMS 20.0VRMS 0.432 0.675 1.415 1.610
24.0VRMS 24.0VRMS 0.525 0.640 0.930 1.240
33.0VRMS 31.0VRMS 0.920 1.000 1.130 1.210
* The time duration for the peak current is 1 millisecond.
NOTE:
Inrush current is less than rated peak current.
Table 3A: UL/ULC Horn Current Ratings (AMPS)
UL Voltage
ULC Voltage
High dBA
Low dBA
16.0VDC 20.0VDC
0.019
0.012
24.0VDC 24.0VDC
0.028
0.015
33.0VDC 31.0VDC
0.039
0.018
16.0VRMS 20.0VRMS
0.029
0.016
24.0VRMS 24.0VRMS
0.044
0.019
33.0VRMS 31.0VRMS
0.061
0.022
WARNING: MAKE SURE THAT THE TOTAL AVERAGE CURRENT AND TOTAL PEAK REQUIRED BY ALL APPLIANCES
THAT ARE CONNECTED TO THE SYSTEM’S PRIMARY AND SECONDARY POWER SOURCES, NAC CIRCUITS, SM, DSM SYNC
MODULES AND PS-12/24-8 POWER SUPPLY DO NOT EXCEED THE POWER SOURCES’ RATED CAPACITY OR THE CURRENT
RATINGS OF ANY FUSES ON THE CIRCUITS TO WHICH THESE APPLIANCES ARE WIRED. OVERLOADING POWER
SOURCES OR EXCEEDING FUSE RATINGS COULD RESULT IN LOSS OF POWER AND FAILURE TO ALERT OCCUPANTS
DURING AN EMERGENCY, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY OR DEATH TO YOU
AND/OR OTHERS.
When calculating the total average or peak currents: Use Table 3 and 3A to determine the highest value of “Rated Average Current”
for an individual strobe (across the expected operating voltage range of the strobe), or use Table 3 to determine the highest value of
“Rated Peak Current” (whichever is higher) of an individual strobe (across the expected voltage range of the strobe), then multiply the
value by the total number of strobes; be sure to add the currents for any other appliances, including audible signaling appliances,
powered by the same source and include any required safety factors.
If the peak current exceeds the power supplies’ inrush capacity, the output voltage provided by the power supplies may drop below the
listed voltage range of the appliances connected to the supply and the voltage may not recover in some types of power supplies. For
example, an auxiliary power supply that lacks filtering at its output stage (either via lack of capacitance and/or lack of battery backup
across the output) may exhibit this characteristic.
CAUTION
:
Strobes are not designed to be used on coded systems in which the applied voltage is cycled on and off.
