2-8
PFC-6030 • 5403595 • REV C-1 • 10/13
Battery Circuit Calculations
Before selecting the battery, it is important to determine the minimum size batteries for standby and alarm times desired for each
application and SLC current draw.
If the wrong batteries are installed in a specific application or incorrect current draw used, the
proper standby and minimum alarm time will not be present.
The battery circuit is rated for 8 to 55 AH batteries and will operate the panel alarm for at least 24 hours and 5 minutes. The
cabinet will house up to two (2) 8 AH or two (2) 18 AH batteries.
Please use the worksheets listed below to calculate the battery size and current draw required for each application and the SLC:
(1) Battery Calculation Worksheet; and (2) SLC Current Draw Worksheet
Battery Calculation Worksheets
Description
Quantity
Standby
(mA)
Total
Standby (mA)
Alarm
(mA)
Total
Alarm
(mA)
Main board (PFC-6030)
1
130
220
LCD Remote RA-6075
20
25
LCD Remote RA-6500
20
50
CA-6075 Class A Expander
12
44
UD-1000 DACT
16
23
PSN-1000/E Power Expander
15
15
LED-16 P-Link
LED-Current (if applicable, see Note 6)
25
15
25
100
DRV-50
LED-Current (if applicable, see Note 6)
25
10
25
215
RLY-5
Relay Current (if applicable, see Note 6)
25
10
35
135
FCB-1000
25
25
FIB-1000
30
30
SPG-1000
40
40
NAC 1
NAC 2
SLC Current Draw - (refer to
"SLC Current Draw
Worksheet"
for calculation)
Total (ma)
Total (ma)
Convert to Amps
x 0.001
Convert to Amps
x 0.001
(*Refer to maximum allowable standby current) Total A:
Total A:
Multiply by standby hours
x____
60 minutes per hour
Alarm time (minutes)
Example:
5 minute alarm: enter 12
10 minute alarm: enter 6
÷ ____
Total Standby AH
Total Alarm AH
+Total Standby AH
Total AH
Efficiency Factor
÷ 0.85
Required AH
*Maximum Allowable Standby Current
(UL 24-Hour standby time)
7 AH
.230 A
18 AH
.619 A
33 AH
1.151 A
55 AH
1.930 A
Important Notes:
1) FACP enclosure can house up to two (2) 18 AH batteries. Larger batteries require accessory
enclosure, part #SSU00500.
2) NFPA 72 requires 24 hours of standby power followed by 5 minutes alarm activation.
3) NFPA 12, 12A requires 24 hours and five minutes of alarm activation.
4) Door holder circuits configured to disconnect upon AC loss need not be included in the
battery standby calculation since they will not draw power during that time. Door holders
will contribute to standby current draw when AC is present.
5) Total current must not exceed power supply rating (3.5A).
6) LED/Relay current must be accounted for in the battery calculation for the supplying source.
