D900-04-00 1 I56-712-03
RK24ADA Series Retrofit Strobes
for Fire Protective Signaling Systems
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
NOTICE: This manual should be left with the owner/user
of this equipment.
General Description
The National Fire Protection Association has published
standards and recommended practices for the installation
and use of the above appliances. It is recommended that
the installer be familiar with these requirements, with local
codes, and any special requirements of the local fire au-
thority having jurisdiction.
The signaling strobes are intended to be connected to the
alarm indicating circuit of a UL-listed fire alarm control
panel and are compatible with DC line supervision. Models
RK2415ADA, RK2475ADA, RK24110ADA, and
RK241575ADA require 24 volt panels. Panels may have
full-wave rectified, unfiltered power supplies. The strobes
produce one flash per second (nominal) with continuous
Figure 1. Vertical and horizontal light distribution:
LIGHT
0˚
–45˚
45˚
90˚ –90˚
Vertical Dispersion Horizontal Dispersion
Model Supply
Voltage
Range
Operating Current from
Regulated Supply
Operating Current from Full-Wave
Rectified Unfiltered Supply
Average
Operating
Current
Average
Operating
Current
(mArms)
Peak
Current
(mA)
20Vrms/
30Vrms
Peak
Current
(mA)
20/30V
Inrush
Current
(mA in
access
of Peak)
Inrush
Current
(Amps in
excess
of Peak)
RK24110ADA
RK2475ADA
RK2415ADA
RK241575ADA
20-30V 210 470/500 0 245 400/500 0.08
20-30V 170 385/400 0 200 320/370 0.04
20-30V 75 160/180 0 90 275/290 0.02
20-30V 93 210/220 0 120 275/290 1.0
NOTE: In-rush current duration is less than 20 microseconds (.00002 seconds).
Table 1. RK24ADA Series Electrical Ratings:
nominal voltage applied.
The MA12/24D is suitable for outdoor applications (-35° to
66° C) when it is used with a WBB Weatherproof Back Box.
The signaling strobe is rated for 0° to 49° C and is NOT
suitable for outdoor use.
The rated light output of the RK2415ADA and
RK241575ADA is 15 cd (see Figure 1).
The rated light output of the RK2475ADA is 75 cd (please
see Figure 1).
The rated light output of the RK24110ADA is 110 cd (please
see Figure 1).
NOTE: The light output at 0° viewing angle for
RK241575ADA is 75 cd (please see Figure 1).
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