P82467-001 F
Sheet 2 of 6
Rated Input Voltage: Multitone Appliances set for 24VDC operation are UL Listed to operate over a voltage range from 18VDC to
31VDC and Multitone Appliances set for 12VDC operation are UL Listed to operate over a voltage range of 9VDC to 15.6VDC
using filtered DC or unfiltered FWR input voltage.
Note: FWR voltages are measured with DC volt meter. Multiply FWR voltage by 1.11 to convert to VRMS.
WARNING: MAKE SURE THAT THE TOTAL CURRENT REQUIRED BY ALL APPLIANCES THAT ARE
CONNECTED TO THE SYSTEM'S PRIMARY AND SECONDARY POWER SOURCES AND SIGNALING CIRCUITS
DOES NOT EXCEED THEIR RATED CURRENT. OVERLOADING THESE SOURCES COULD RESULT IN LOSS OF
POWER AND FAILURE TO ALERT OCCUPANTS DURING AN EMERGENCY.
When calculating the total current: use Table 1 to determine the "Input Current" for an individual Multitone then multiply this value
by the total number of appliances; be sure to add the current for any other appliances powered by the same source and include any
required safety factors.
WARNING: MAKE SURE THAT ALL FUSES USED ON SIGNALING CIRCUITS ARE RATED TO HANDLE THE
MAXIMUM INRUSH OR PEAK CURRENT FROM ALL APPLIANCES ON THOSE CIRCUITS. FAILURE TO DO THIS
MAY RESULT IN LOSS OF POWER TO THE SIGNALING CIRCUIT AND THE FAILURE OF ALL APPLIANCES ON
THAT CIRCUIT TO OPERATE.
The Multitone audible appliances produce a brief inrush current that lasts for just 2 microseconds but can reach a peak value of 8.0
Amps (11.2 amps for FWR input).
WARNING: IF MULTITONE APPLIANCES ARE OPERATED WITHIN 15 INCHES OF A PERSON'S EAR, THEY
CAN PRODUCE A SOUND PRESSURE LEVEL THAT EXCEEDS THE MAXIMUM 120 dBA PERMITTED BY ADA
AND OSHA RULES. EXPOSURE TO SUCH SOUND LEVELS CAN RESULT IN DAMAGE TO A PERSON'S HEARING.
SETTINGS:
The Jumper Plug (DP1) and Switch (SW1) of the Multitone Appliance, shown in Figure 1, are used to set the desired input voltage,
dBA sound output level and alarm tone. The factory settings are shown below. Read these instructions carefully before changing any
of these factory settings.
Figure 1.
PC Board Layout Showing Location
of Jumper Plug (DP1) and Switch (SW1)
The factory settings are:
24VDC
DP1
set
on
24
HIGH dBA SW1 POS 1 set on 1
HORN TONE SW1 POS 2, 3, 4 set on 1, 1, 1
STEP 1:
Set desired input voltage and dBA sound output level as follows (Refer to Figures 2 and 3):
