
Appendix D: Power Supply and Battery Calculations (Selection Guide)
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Appendix D: Power Supply and Battery Calculations (Selection Guide)
Use the form below to determine the required secondary power supply (batteries).
* Assume three Initiating Circuits are in alarm.
' Use 0.084 for five minutes, 0.168 for 10 minutes and 0.5 for half hour of alarm as a multiplier figure.
Ò Using the a 2-wire photoelectric smoke detector.
Total Current Requirement: ALARM (B)______ Amps. (Value obtained from column B)
Battery Capacity Requirement:
Battery (AH) = ([STANDBY (A) ______ ] x [(24, 60 or 90 Hours) ___ ]) +
([ALARM (B) ______ ] x [Alarm in Hr.] _____)
= (C) ______AH
Total Alarm Current: Must be 6 amperes or less. Indicating Circuits must not to exceed 5 amperes.
Battery Selection: Multiply (C) by 1.20 to derate battery.
IMPORTANT NOTICE
The main AC branch circuit connection for Fire Alarm Control Panel must provide a dedicated continuous power without provision of any
disconnect devices. Use #12 AWG wire with 600-volt insulation and proper over-current circuit protection that complies with the local codes.
POWER REQUIREMENTS (ALL CURRENTS ARE IN AMPERES)
Model
Number
Description Qty Standby
Total
Standby
Alarm
Total
Alarm
FA-300-6LD
Fire Alarm, 6 Det, Control
Panel FIXED ELR/
ACTIVE ELR
X
0.123/
0.092
=
0.316/
0.292
=
FA-300-6L
Fire Alarm, 6 Det, Control
Panel FIXED ELR/
ACTIVE ELR
X
0.123/
0.100
=
0.318/
0.300
=
ICAC-306
Det Class A Converter
Adder Module
X 0.000
= 0.000 =
OCAC-30
Sig Class A Converter
Adder Module--2 Circuits
X 0.000
= 0.000 =
PR-300
Polarity Reversal and City
Tie Module
X 0.050
= 0.300 =
RM-306 6 Relay Adder Module X 0.000
= 0.080 =
SRM-312
12 Relay Smart Relay
Module
X 0.030
=0.090=
RAM-300LCD
Smart Remote
Annunciator
X 0.016
=0.040=
RAM-208/216 Remote Annunciators X 0.035
=0.090=
RTI-1 Remote Trouble Indicator X 0.035
=0.035=
Two-Wire Smoke Detectors X Ò 0.00011
= * 0.135 =
Four-Wire Smoke Detectors X
= =
Signal Load (bells, horns, strobes, and etc.) X
=
Auxiliary Power Supply for Annunciators, etc.
=
=
Total currents (Add above currents) STANDBY
(A)ALARM(B)
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