![background image](http://html1.mh-extra.com/html/mircom/fa-300-6l-series/fa-300-6l-series_installation-and-operation-manual_1805759070.webp)
Appendix D: Power Supply and Battery Calculations (Selection Guide)
64
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
)