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Battery Calculations
A.1 Main Power Supply
The MS-2410BC provides filtered power for operating the fire alarm control panel, operating external devices and
operating the standby battery. The power for operating external devices is limited. Use Table A-2 (standby or non-
alarm) and Table A-3 (alarm) to determine if external loading is within the capabilities of the power supply.
Be certain to power 4-wire smoke detectors from TB2, Terminals 3 and 4. In Table A -2 , external devices are con-
nected to TB2 only.
TABLE A-2:
Device Type
Main Circuit Board
RTB Remote Trouble Buzzer
LED-10IM
4XTMF Module
2-wire Detector Heads
4-wire Detector Heads
Power Supervision Relays
Current Draw from TB2
(nonalarm
1. Refer to the Device Compatibility Document for 2-wire smoke detector standby current.
2. Must use compatible listed Power Supervision Relay.
3. The total standby current must include both the resettable (TB2 Terminals 3 & 4) and nonresettable (TB2
Terminals 1 & 2) power. Caution must be taken to ensure that current drawn from these outputs during
alarm does not exceed maximum ratings specified (see Table A-2 ).
52
Filtered Load in Standby
# of
Devices
1
(1 max.)
(1 max.)
(1 max.)
[
]
[
]
2
[
]
3
)
Sum Column for Standby Load
Document #50801
@24 VDC
.
Current
(amps)
X
0.138
X
0.020
X
0.017
X
0.005
1
X
[
]
1
X
[
]
X
0.025
Rev.B
8/17/98
P/N 50801:B
Total Current
(amps)
=
0.138
=
=
=
=
=
=
=
=
amps
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