Notifier FirstCommand Series Manual —
P/N LS10001-001NF-E:H 1/8/2018
79
Calculating the System Current Draw
Power Supply Calculations
Table 6.2 contains two columns for calculating current draws. For each column, calculate the current and enter the total (in amps) in the
bottom row. When finished, copy the totals from Calculation Column 1 and Calculation Column 2 to Table 6.3 on page 80.
Device Type
Calculation Column 1
Secondary (Battery) Power Source
Standby Current (amps)
Calculation Column 2
Secondary (Battery) Power Source
Alarm Current (amps)
Qty
X [current draw] =
total
Qty
X [current draw] =
total
NFC-50/100 Primary Console
(Not including speaker load)
1
X [0.272]=
0.272
1
X [0.446]=
0.446
NFC-BDA-25/70V
Optional Audio Amplifier Module
1
1 In backup configurations, the optional amplifier draws no additional current in alarm.
[ ]
(1 max.)
X [0.100]=
[ ]
[ ]
(1 max.)
X [0.235]=
[ ]
NFC-CE6 Speaker Circuit Expander
[ ]
(1 max.)
X [0.020]=
[ ]
[ ]
(1 max.)
X [0.189]=
[ ]
NFC-LOC Local Operator Console
2
2 Maximum combined total of eight (8) operator interface devices.
[ ]
X [0.085]=
[ ]
[ ]
X [0.100]=
[ ]
[ ]
X [0.050]=
[ ]
[ ]
X [0.064]=
[ ]
NFC-RPU Remote Page Unit
[ ]
X [0.050]=
[ ]
[ ]
X [0.068]=
[ ]
NFC-50DA, NFC-125DA, NFC-50/100DA
Remote Amplifiers
3
3 Maximum combined total of eight (8) remote amplifiers.
[ ]
X [0.012]=
[ ]
[ ]
X [0.012]=
[ ]
NFC-FFT Firefighter Telephone
[ ]
X[0.120]=
[ ]
[ ]
X[0.230]=
[ ]
Speakers (50 watts maximum/amplifier)
1/4 Watt
[ ]
X[0.017]=
[ ]
1/2 Watt
[ ]
X[0.033]=
[ ]
3/4 Watt
[ ]
X[0.050]=
[ ]
1 Watt
[ ]
X[0.068]=
[ ]
2 Watts
[ ]
X[0.132]=
[ ]
Additional Current Draw from TB17 Special
Application Auxiliary Power Output
(0.5 amp maximum)
[ ]
X [ ]=
[ ]
[ ]
X [ ]=
[ ]
NAC Circuit Output (2.0 amps maximum)
[ ]
X [ ]=
[ ]
Power Supervision Relays
4
4 Must use a compatible, UL-listed Power Supervision Relay
[ ]
X [0.025]=
[ ]
[ ]
X [0.025]=
[ ]
AIM-1A, RSM-1A Isolators
[ ]
X [0.0145]=
[ ]
[ ]
X [0.0145]=
[ ]
SP-SVC Volume Control
[ ]
X[0.010]=
[ ]
[ ]
X[0.010]=
[ ]
Sum each column for totals
Secondary Standby:
Secondary Alarm:
Table 6.2 System Current Draw Calculations
Summary of Contents for Notifier FirstCommand Series
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