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Device Quantity Standby
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Total
standby
Alarm existing/
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Total alarm
D7053 MUX I/ O
Module Fire
0.70 mA 0.70 mA
Smoke Detectors
Bells, Horns, and
so on
Other Sensors
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Grand Total
Standby Existing
Grand Total
Alarm Existing
1
The 24 VDC existing requirements for the D7030X, FMR-7033 and D7035 are shown at 75%
of the 12 VDC level shown on the specification sheets for these models. The FPD-7024
regulates 24 VDC power from the battery to 12 VDC for these accessories.
2
Add 30 mA for each relay activated
Table 2.4: Standby battery capacity calculations
The units shown in the following table are Amp hours (Ah), and the calculations include a 20%
derating factor.
Grand Total Standby Existing (in amps)
CS
Total Hours of Standby Required
(usually 24 or 60):
HS
Total Standby Capacity (multiply CS x HS) TS= CS x HS
Grand Total Alarm Existing (in amps) CA
Total Hours of Alarm Time Required
(usually 0.083 o 0.25):
HA
Total Standby Capacity (multiply CA x HA) TA= CA x HA
Total Capacity Required (add TA + TS): TC = TA + TS
Required Capacity with 20% Derating
(TC x 1.2)
C = TC x 1.2
Table 2.5: Required battery size calculation
i
Notice!
The required battery size to support the system can be calculated using the tables for Stand-
by load battery size, 16 and Alarm load battery size, 16.
Fire Alarm Control Panels Overview | en 15
Bosch Security System, Inc. Installation and Operation Manual 2012.08 | 04 | F01U008458