Calculating the System Current Draw
Power Supply Requirements
FCPS-24S PN 51977:C1 08/06/03
39
Table 6.3 contains three columns for calculating current draws. For each column, calculate the
current and enter the total (in amperes) in the bottom row. When finished, copy the totals from
Calculation Column 2 and Calculation Column 3 to Table 6.4 on page 40.
Table 6.3 System Current Draw Calculations
Device Type
Calculate Column 1
Primary, Non-Fire Alarm Current
(amps)
Calculate Column 2
Primary, Fire Alarm Current
(amps)
Calculation Column 3
Secondary, Non-Fire Alarm Current
(amps)
Qty
X (current draw) =
Total
Qty
X (current draw)
=
Total
Qty
X (current draw) =
Total
Main Circuit Board
1
X [ 0.091] =
1
X [ 0.145] =
1
X [ 0.065] =
Power Supervision
Relay
[ ]
X [ 0.025] =
[ ]
X [0.025 ] =
[ ]
X [ 0.025] =
NAC/Output #1
[ ]
X [ ] =
NAC/Output #2
[ ]
X [ ] =
NAC/Output #3
[ ]
X [ ] =
NAC/Output #4
[ ]
X [ ] =
Current Draw from
TB4 Terminals 9 & 10
[ ] =
[ ] =
[ ] =
Sum each column
for totals
Primary Non-Alarm =
Primary Alarm =
Secondary Alarm =
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