Document #50801 Rev. B 8/17/98 P/N 50801:B
53
Battery Calculations
TABLE A-3: Filtered Load in Alarm
@24 VDC
.
Device Type
# of
Devices
Current
(amps)
Total Current
(amps)
Main Circuit Board 1 X 0.245 =
0.245
1
1. The current shown represents one zone on the Main Circuit Board in alarm. For all ten zones in alarm, the cur-
rent draw increases to 0.590 amps.
RTB Remote Trouble Buzzer (1 max.) X 0.050 =
LED-10IM (1 max.) X 0.017 =
4XTMF Module (1 max.) X
0.011
2
2. If using the Reverse Polarity Alarm output, add 0.005 amps; if using the Reverse Polarity Trouble output, add
another 0.005 amps.
=
4-wire Smoke Detector
3
3. Current limitations of terminals:
TB2, Terminals 1 and 2 = 0.500 amps, filtered, 24 VDC +/-5%, 120 Hz ripple @ 10 mV
RMS
, nonresettable power (100 Hz
ripple if MS-2410BCE)
TB2, Terminals 3 and 4 = 0.500 amps, filtered, 24 VDC +/-5%, 120 Hz ripple @ 10 mV
RMS
, resettable power (100 Hz rip-
ple if MS-2410BCE)
[ ] X [ ] =
Power Supervision Relay
4
4. Must use compatible listed Power Supervision Relay
[ ] X 0.025 =
Notification Appliances
5
5. Current limitation of Terminal TB3 circuits is 1.25 amps per Notification Appliance Circuit expandable to 2.5
amps
[ ] X [ ] =
Notification Appliances [ ] x [ ] =
Current Draw from TB2
3
(alarm
current)
=
Sum Column for Standby Load
6
6. Total current draw listed above cannot exceed:
• 3.6 amps with standard transformer installed (only)
• 6.6 amp with both the standard and optional transformers installed
=amps
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