Instruction manual

3-27
THE DUAL-CIRCUIT SAFEPATH
®
POWER SUPPLY HAS A MAXIMUM
OUTPUT CURRENT CAPACITY OF 6 AMPS. EXCEEDING THIS
SPECIFICATION WILL CAUSE THE SAFEPATH
®
PANEL TO FAIL OR
OPERATE IMPROPERLY IN THE ALARM CONDITION.
If the current value exceeds 6 Amps and the Strobe NAC Circuit is being used, recommend
powering the Strobe NAC Circuit separately or from a power Booster (Wheelock, Inc. PS-12/24-
8).
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.
Table 3-7
Calculations for Amplifier Alarm Current
Amplifier Module Alarm Current Calculation
SAA-40S
1
[(Total wattage of connected speakers) X 0.055] + 0.4A
SAA-80S/SE
1
[(Total wattage of connected speakers) X 0.056] + 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.
2
“SPKR AMP” circuit on each amplifier module cannot exceed 2 Amps.
Table 3-8
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.
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 Worksheet (Appendix B)
! Warnin
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