III- 32
BATTERY SIZE CALCULATIONS
STANDBY ALARM
CURRENT CURRENT
(A.) (A.)
CONTROL UNIT (2 ZONES) .025 .110
ADD FOR A 4 ZONE CONTROL UNIT +.010 +.080
OPTIONAL MODULES
15212 - REMOTE ANNUNCIATOR MODULE +.002 +.050
7704 ANNUNCIATOR +.022 +.092
15213A - MARCH TIME/TEMPORAL SIGNALING + 0 +.050
15219 - ZONE RELAY MODULE + 0 +.115
15209 - CITY TIE MODULE +.001 +.035
15215 - CITY TIE/AUXILIARY RELAY MODULE +.002 +.080
15217 - AUXILIARY RELAY MODULE +.001 +.030
15207 - SUPERVISORY MODULE + 0 + 0
15206 - D.A.C.T INTERFACE MODULE +.002 +.045
2-WIRE SMOKE DETECTORS
CAT. # OF SM. DET. QUANITY X CURRENT (A.)
X = + N/A
X = + N/A
X = + N/A
4-WIRE SMOKE DETECTORS
CAT. # OF SM. DET. QUANITY X CURRENT (A.)
STANDBY X = + N/A
ALARM X = N/A +
STANDBY X = + N/A
ALARM X = N/A +
STANDBY X = + N/A
ALARM X = N/A +
STANDBY X = + N/A
ALARM X = N/A +
END OF LINE RELAY QUANITY X CURRENT
X =+ +
CAT. # OF SIGNAL QUANITY X CURRENT
X = N/A +
X = N/A +
X = N/A +
X = N/A +
7700 TROUBLE UNIT = +.040 +.040
OTHER = + +
TOTAL
TOTAL STANDBY CURRENT HOURS OF STANDBY REQUIRED PER
(FROM ABOVE) N.F.P.A. STANDARD (24 OR 60)
A. X HOURS = A.H. FOR
STANDBY
TOTAL ALARM CURRENT 5 MINUTES OF ALARM OPERATION
(FROM ABOVE) PER N.F.P.A. STANDARD *
A. X 0.33 HOURS = A.H. FOR
ALARM
A.H. FOR STANDBY + A.H. FOR ALARM = A.H. REQUIRED
BATTERY CAPACITY**
* An additional multiplier is included to compensate for the higher discharge rate in alarm.
** Battery capacity decreases with age, a four year old battery can lose up to 50% of its capacity.
Compensations should be made to allow for this loss.
NOTE: The minimum battery size used should be 6 A.H. and the
maximum battery size is 15 A.H.
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