3-22
Table 3-6
Calculations for Amplifier Alarm Current
Amplifier Module
Alarm Current Calculation
SAA-40S
1
[(Total wattage of connected speakers) X 55] + 0.4A
SAA-80S/SE
1
[(Total wattage of connected speakers) X 56] + 0.6A
SALL-15S
1, 2
(Sum of the “SPKR AMP” current) + 0.1A
1
If Strobe NAC Circuit is used, add total strobe current on that circuit to the corresponding
amplifier module calculation. A Strobe NAC Circuit cannot exceed 2 Amps of current.
2
“SPKR AMP” circuit on each amplifier module cannot exceed 2 Amps.
Table 3-7
Average Current Output Measured by Wheelock, Inc.
Amplifier Model
Typical Voice
Temporal
CODE-3 Tone
Worst Case
Tone HI/LO
Strobe Current
SAA-40S
0.600 Amps
0.750 Amps
1.600 Amps
2.000 Amps
Max.
SAA-80S/SE
1.000 Amps
1.050 Amps
2.500 Amps
2.000 Amps
Max.
SALL-15S
0.100 Amps +
“SPKR AMP”
current
0.100 Amps +
“SPKR AMP”
current
0.100 Amps +
“SPKR AMP”
current
2.000 Amps
Max.
Alarm Current Calculating Procedure
1. Using Table 3-7, calculate the alarm current for each amplifier module installed.
2. Using Table 3-5, add up the alarm currents of all optional modules. If multiple Remote
Microphone Stations (RMS-2) are used, calculate the alarm current of just one
.
3. Add together the strobe current from the amplifiers NAC circuit.
4. Total the results of Steps 1 through 3.
5. Divide Step 3 results by 12 (5 minutes of alarm) or 4 (15 minutes of alarm) and record this value
as Alarm Amp-hours.
Calculating Backup Battery Requirements
Good engineering practices recommend the total Amp-hours required for backup should not
exceed 80% of the Backup Battery capacity.
Backup Battery Calculation Procedure
1. Add the total Standby Current to the total Alarm Current.
2. Multiply Step 1 by 1.25. This is the minimum Backup Battery requirement for this Panel.
3. Record results on the battery calculation worksheet at the end of this manual.
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