P84234H
Sheet 2 of 4
Table 3: Current Ratings (AMPS) for 24VDC and 12VDC Wall Models
Maximum RMS Current with Hi dBA Setting
Voltage
NS-241575W
Voltage
NS-121575W
DC 16.0VDC-33.0VDC
0.104 8.0VDC-17.5VDC
0.220
FWR 16.0VRMS-33.0VRMS
0.174
8.0VRMS-17.5VRMS
0.325
Maximum RMS Current with Low dBA Setting
Voltage
NS-241575W
Voltage
NS-121575W
DC 16.0VDC-33.0VDC
0.096 8.0VDC-17.5VDC
0.210
FWR 16.0VRMS-33.0VRMS
0.160
8.0VRMS-17.5VRMS
0.320
When calculating the total current: Use Table 3 to determine the highest value of “RMS Current” for an individual NS then multiply the value by the total number of
NS Appliances. Be sure to add the currents for any other appliances powered by the same source and to include any required safety factors.
NOTE:
The maximum number of strobes on a single notification appliance circuit shall not exceed 50.
CAUTION:
These notification appliances are UL Listed as “Regulated”. They are intended to be used with FACPs whose notification circuits are UL Listed as
“Regulated.” These appliances shall not be used on UL Listed “Special Application” notification circuits unless the appliances are identified to be compatible in the
installation instructions of the FACP or unless the FACP is identified to be compatible in this instruction manual.
WARNING: THESE APPLIANCES WERE TESTED TO THE REGULATED VOLTAGE LIMITS OF 16.0-33.0 VOLTS FOR 24V MODELS USING
FILTERED DC OR UNFILTERED FULL-WAVE-RECTIFIED VOLTAGE. DO NOT APPLY VOLTAGE OUTSIDE OF THIS RANGE.
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. THE MAXIMUM
WIRE IMPEDANCE BETWEEN STROBES SHALL NOT EXCEED 35 OHMS.
WARNING: MAKE SURE THAT THE TOTAL RMS 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.
CAUTION:
These horn/strobes are not designed to be used on coded systems in which the applied voltage is cycled on and off.
SOUND OUTPUT (SPL) SETTINGS:
WARNING: THE NS APPLIANCES MUST BE FIELD SET TO THE DESIRED TONE AND dBA SOUND OUTPUT LEVEL BEFORE THEY ARE
INSTALLED. THIS IS DONE BY PROPERLY INSERTING JUMPER PLUGS IN ACCORDANCE WITH THESE INSTRUCTIONS. INCORRECT
SETTINGS WILL RESULT IN IMPROPER PERFORMANCE, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY OR
DEATH TO YOU AND/OR OTHERS.
Figure 1: Showing Location of Jumper Plug
JUMPER
PLUGS
TOP
PLUG
NO PLUG
HI
LOW
CODE 3
HORN
Factory setting is on High dB and Code 3.
NOTE:
The NS-24MCW must be set for Code 3 horn when installed on a synchronized notification appliance circuit (NAC).
Figure 2: Jumper plug settings for
High dB and Code 3.
Figure 3: Jumper plug settings for Low
dB and Continuous Horn.
Figure 4: Jumper plug settings for
High dB and Continuous Horn.
Figure 5: Jumper plug settings for Low
dB and Code 3.
SHOWN
SET ON
HI dB
CENTER PIN
IS NOT USED
SHOWN
SET ON
CODE 3
(Use needle nose pliers to pull and
properly set the jumper plugs.)
CENTER PIN
IS NOT USED
SHOWN
SET ON
CONT' HORN *
SHOWN
SET ON
LOW dB
No jumper plugs are needed for
Continuous Horn and low dB settings.
CENTER PIN
IS NOT USED
SHOWN
SET ON
CONT' HORN *
SHOWN
SET ON
HI dB
CENTER PIN
IS NOT USED
SHOWN
SET ON
LOW dB
SHOWN
SET ON
CODE 3
