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Table 3:  Average RMS Current

24 VDC Models

Audible

Wall Mount Audible Strobe Models

Ceiling Mount Audible Strobe Models

AH-24

AS-241575W

AS-24MCW

AS-24MCWH

AS-24MCC

AS-24MCCH

1575cd

15cd

30cd

75cd 110cd 135cd 185cd 15cd

30cd

75cd

95cd

115cd

177cd

High (99) 

dBA

24 vdc

0.062

0.100

0.080 0.102 0.150 0.194 0.250 0.320 0.088 0.114 0.165 0.205 0.250

0.320

UL max*

0.080

0.121

0.088 0.125 0.200 0.267 0.355 0.480 0.095 0.138 0.221 0.285

0.355

0.480

Med (95) 

dBA

24 vdc

0.033

0.080

0.060 0.084 0.132 0.173 0.230 0.305 0.066 0.092 0.145 0.186 0.230

0.305

UL max*

0.043

0.107

0.074 0.110

0.190 0.253 0.340 0.465 0.080 0.122 0.201 0.269

0.340

0.465

Low (90) 

dBA

24 vdc

0.017

0.072

0.052 0.076 0.121 0.158 0.220 0.295 0.056 0.082 0.132 0.173 0.220

0.295

UL max*

0.021

0.100

0.068 0.105 0.182 0.245 0.335 0.460 0.074

0.113 0.198 0.263

0.335

0.460

12 VDC Models

Audible

Wall Mount 

Audible 

Strobe

AH-12

AS-121575W

High (99) 

dBA

12 vdc

0.163

0.260

UL max*

0.192

0.320

Med (95) 

dBA

12 vdc

0.076

0.195

UL max*

0.108

0.275

Low (90) 

dBA

12 vdc

0.039

0.175

UL max*

0.058

0.265

Table 1:  Ratings Per UL 1971

Model 

Number

Input 

Voltage 

VDC

Regulated 

Voltage Range 

VDC/FWR

Strobe 

Candela (cd)

AS-24MCW

24

16.0 - 33.0

15/30/75/110

AS-24MCCH

24

16.0 - 33.0

115/177

AS-241575W

24

16.0 - 33.0

15 (75 on Axis)

AS-121575W

12

8.0 – 17.5

15 (75 on Axis)

AS-24MCC

24

16.0 - 33.0

15/30/75/95

AS-24MCWH

24

16.0 - 33.0

135/185

ASWP-2475W

24

16.0 - 33.0

75 @ -31°F

Table 2: dBA Ratings for 12 VDC and 24 VDC Series 

AS/AH 12 and 24 VDC Audible

Description

Volume

Reverberant 

dBA 

Per UL 464 

@ 10 ft.

Anechoic 

dBA 

@ 10 ft.

Continuous 

Horn

High

91

99

Medium

88

95

Low

83

90

Code 3 Horn

High

87

99

Medium

84

95

Low

79

90

* RMS current ratings are per UL average RMS method.  UL max current 

rating is the maximum RMS current within the listed voltage range (16-33v 

for 24v units).  For strobes the UL max current is usually at the minimum 

listed voltage (16v for 24v units).  For audibles the max current is usually 

at the maximum listed voltage (33v  for 24v units).  For unfiltered FWR 

ratings, see installation instructions.

Table 4:  Average Current* (AMPS) For Series ASWP

#

Voltage

High dBA

Setting

(99) dBA

Medium dBA

Setting

(95) dBA

Low  dBA

Setting

(90) dBA

24.0 VDC

0.128

0.105

0.098

UL Max*

0.168

0.155

0.150

NOTE: All CAUTIONS and WARNINGS are identified by the symbol  . All warnings are printed in bold capital letters.

 

  WARNING:  PLEASE READ THESE SPECIFICATIONS AND ASSOCIATED INSTALLATION INSTRUCTIONS CAREFULLY BEFORE USING, SPECIFYING OR 

APPLYING THIS PRODUCT.  VISIT WWW.COOPERWHEELOCK.COM OR CONTACT COOPER WHEELOCK FOR THE CURRENT INSTALLATION INSTRUCTIONS.  

FAILURE TO COMPLY WITH ANY OF THESE INSTRUCTIONS, CAUTIONS OR WARNINGS COULD RESULT IN IMPROPER APPLICATION, INSTALLATION AND/OR 

OPERATION OF THESE PRODUCTS IN AN EMERGENCY SITUATION, WHICH COULD RESULT IN PROPERTY DAMAGE, AND SERIOUS INJURY OR DEATH TO YOU 

AND/OR OTHERS. 

General Notes:

 

Strobes are designed to flash at 1 flash per second minimum over their “Regulated Voltage Range”.  Note that NFPA-72 specifies a flash rate of 1 

to 2 flashes per second and ADA Guidelines specify a flash rate of 1 to 3 flashes per second.

• 

All candela ratings represent minimum effective Strobe intensity based on UL Standard 1971.

• 

Series NS Strobe products are listed under UL Standard 1971 for indoor use with a temperature range of 32°F to 120°F (0°C to 49°C) and 

maximum humidity of 93% (± 2%).   

• 

Series NH horns are listed under UL Standard 464 for audible signal appliances (Indoor use only). 

• 

“Regulated Voltage Range” is the newest terminology used by UL to identify the voltage range.  Prior to this change UL used the 

terminology “Listed Voltage Range”.

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