P82483 E
Sheet 2 of 7
WARNING: WHEELOCK STRONGLY RECOMMENDS THAT THE VOLTAGE APPLIED TO THESE PRODUCTS BE WITHIN
THEIR RATED INPUT VOLTAGE RANGE. THE APPLICATION OF IMPROPER VOLTAGE MAY RESULT IN DEGRADED
OPERATION OR DAMAGE TO THESE PRODUCTS, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY
OR DEATH TO YOU AND/OR OTHERS.
The UL Listed "Rated Input Voltage" is 20.0-31.0VDC using either filtered (DC) or unfiltered full-wave-rectified (FWR) voltage. 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 applied voltage to the strobes. All VFWR voltages are measured with DC volt meter. Multiply VFWR
voltage by 1.11 to convert to VRMS.
Table 2: Strobe Current Requirement (AMPS)
Rated Average Current Rated Peak Current Rated Inrush Current
Voltage LS MS LSM IS LS MS LSM IS LS MS LSM IS
20.0VDC .080 .135 .115 .245 .160 .288 .250 .500 .210 .280 .225 .650
24.0VDC .080 .135 .115 .225 .190 .296 .260 .450 .250 .280 .270 .660
31.0VDC .080 .135 .115 .195 .210 .296 .260 .370 .320 .300 .360 .880
20.0VFWR .080 .135 .125 .258 .210 .390 .350 .700 .320 .390 .315 .920
24.0VFWR .081 .135 .125 .233 .216 .390 .365 .640 .380 .390 .380 .930
31.0VFWR .091 .135 .125 .196 .240 .390 .365 .520 .450 .420 .500 1.25
WARNING: MAKE SURE THAT THE TOTAL AVERAGE CURRENT, TOTAL PEAK CURRENT AND TOTAL INRUSH
CURRENT REQUIRED BY ALL APPLIANCES THAT ARE CONNECTED TO THE SYSTEM’S PRIMARY AND SECONDARY
POWER SOURCES AND SIGNALING CIRCUITS 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, peak or inrush currents: Use Table 2 to determine the highest value of “Rated Average Current”
for an individual strobe (across the expected operating voltage range of the strobe), or the highest value of “Rated Inrush Current” or
“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 inrush current or 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.
NOTE: In addition to the inrush current shown in Table 2, the 75cd strobes also produce a brief inrush current that lasts about 15
microseconds with a peak value of 2.0 Amps (2.8 Amps for FWR input).
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