Appendix A: Power Supply And Battery Calculations - Secutron MR-2900 Installation Manual

5.0 Appendix A:
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. Refer to 3.0 Technical
Specifications on page 23 for specifications.
Model Number
Fire Alarm Control Unit (includes
MR-2900
MR-2931, MR-2905, MR-2902
MR-2900
Unique LED's
MR-2910 Network Communication Module
MR-2938 Conventional Input Circuit Module
MR-2929 Addressable Input Circuit Module
MR-2909 Addressable Input Circuit Module
MR-2928 Conventional Input Circuit Module
MR-2919 Addressable Input Circuit Module
MR-2614 LED Annunciator
MR-2622 Annunciator Strip
MR-2644 LCD Annunciator
MR-2900-CITY City Card
MR-2900-DACT Digital Communication Module
MR-2109-3 Digiquad Module
MR-2944 Annunciator
MR-2915 LED Driver Card
MR-2920 Strip Printer
MR-D1010-R1 Fibre Optic Modem
MR-D1010-R2 Fibre Optic Modem
MR-2690 Isolation Module
Two-Wire Smoke Detectors
Four-Wire Smoke Detectors
Signal Load (bells, horns, strobes, and etc.)
Auxiliary Power Supply for Annunciators, etc.
Total currents (Add above currents)
See 6.0 Appendix B: ULC Listed Compatible Smoke Detectors on page 28 and 7.0 Appendix C: UL Listed Compatible Devices on page 31 for other compatible
devices.
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
Battery Selection: Multiply (C) by 1.20 to derate battery.
26
Power Supply and Battery Calculations
IMPORTANT NOTICE
POWER REQUIREMENTS (ALL CURRENTS ARE IN AMPERES)
Description Qty
Total
Standby
Standby
X 0.092 =
X 0.005 =
X 0.005 =
X 0.018 =
X 0.050 =
X 0.001 =
X 0.014 =
X 0.005 =
X 0.020 =
X 0.005 =
X 0.030 =
X 0.020 =
X 0.040 =
X 0.008 =
X 0.075 =
X 0.001 =
X 0.125 =
X 0.075 =
X 0.150 =
X 0.010 =
X š =
X š =
X š =
=
STANDBY (A)
Alarm
0.107 =
n/a =
0.005 =
0.101 =
0.050 =
0.001 =
0.094 =
0.005 =
0.155 =
0.125 =
0.070 =
0.315
(reverse polarity mode)
0.035 =
(in alarm (+ load - 65mA for
3 circuits)
0.060 =
0.0008 =
0.075 =
0.010 =
0.800 =
when printing
=
=
=
=
=
=
=
(B)
ALARM
Total
Alarm