audible are wired to operate in unison on a single circuit. 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.
NOTE:
The maximum number of strobes on a single notification appliance circuit shall not exceed 50.
WARNING: MAKE SURE THAT THE TOTAL RATED CURRENT REQUIRED BY ALL APPLIANCES THAT ARE CONNECTED TO THE SYSTEM’S PRIMARY AND
SECONDARY POWER SOURCES, APPLIANCE CIRCUITS, SM, DSM SYNC MODULES AND WHEELOCK POWER SUPPLIES DOES 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.
Table 2: UL Current Ratings for Multitone only (AMPS)
Maximum RMS Current
(AMPS)
Tone Tone
Description
16-33VDC
16-33VRMS
HI
dBA
STD dBA HI dBASTD dBA
Horn
Broadband Horn (Continuous)
0.108
0.044
0.087
0.045
Bell
1560 Hz Modulated (0.07 Sec. ON/Repeat)
0.053
0.024
0.051
0.028
March Time
Horn (0.25 Sec. ON/0.25 Sec. OFF/Repeat)
0.104
0.087
0.087
0.045
Code 3 Horn
Horn (ANSI S3.41 Temporal Pattern)
0.091
0.035
0.087
0.045
Code 3 Tone
500 Hz (ANSI S3.41 Temporal Pattern)
0.075
0.025
0.056
0.029
Slow Whoop
500-1200Hz Sweep (4.0 Sec. ON/0.5 Sec. OFF/Repeat)
0.098
0.037
0.092
0.042
Siren
600-1200Hz Sweep (1.0 Sec. ON/Repeat)
0.104
0.036
0.092
0.040
HI/LO
1000/800 Hz (0.25 Sec. ON/Alternate)
0.057
0.025
0.058
0.032
Table 2A: ULC Current Ratings for 24VDC Multitone only (AMPS)
DC
Tone
HI/LO
Volume
20VDC 24VDC
31VDC
HI 0.036 0.040
0.050
Horn
STD 0.021 0.023
0.029
HI 0.013 0.014
0.018
Bell
STD 0.011 0.012
0.015
HI 0.036 0.040
0.050
March Time
STD 0.021 0.023
0.029
HI 0.036 0.040
0.050
Code 3 Horn
STD 0.021 0.023
0.029
HI 0.025 0.028
0.035
Code 3 Tone
STD 0.015 0.017
0.021
HI 0.043 0.048
0.060
Slow Whoop
STD 0.023 0.026
0.033
HI 0.032 0.036
0.045
Siren
STD 0.021 0.023
0.029
HI 0.018 0.020
0.025
HI/LO
STD 0.013 0.014
0.018
Table 2B: Strobe Current Ratings (AMPS)
Maximum RMS Current
UL Voltage
2475
24115
24135
24177
24185
DC 16-33VDC
0.138
0.300
0.300
0.420
0.420
FWR 16-33VRMS
0.222
0.455
0.455
0.645
0.645
AUDIBILITY RATINGS:
Table 3: dBA Ratings
UL 24VDC dBA Reverberant Ratings
Per UL 464 at 10 Feet
ULC 24VDC dBA Anechoic Ratings
Per CAN/ULC S525-99 at 10 Feet
Tone
HI/LO
Volume
16V 24V 33V 20V 24V 31V
HI 89 92 94 97 99 100
Horn
STD 84 87 90 91
93 94
HI 83 86 88 90 92 93
Bell
STD 76 80 83 85
87 88
HI 86 89 91 97 99 100
March Time
STD 80 84 87 91
93 94
HI 85 88 90 97 99 100
Code 3 Horn
STD 79 83 86 91
93 94
HI 81 85 86 93 95 96
Code 3 Tone
STD 76 80 82 88
90 91
HI 87 90 92 97 99 100
Slow Whoop
STD 81 85 87 92
94 95
HI 86 89 92 96 98 99
Siren
STD 81 84 87 91
93 94
HI/LO HI
83
86 89
91
93
94
P84870E
Sheet 2 of 6
