5: Maximum Battery Standby Load - Honeywell Farenhyt Series Manual

Calculating Current Draw and Standby Battery
5495/5499 Power Supply
C Notification Appliances Current
D Total current ratings of all devices in system (line A + line B + C)
E Total current ratings converted to amperes (line D x 0.001):
F Number of standby hours
G Multiply lines E and F.
H Alarm sounding period in hours. (For example, 5 minutes = 0.0833 hours)
I Multiply lines E and H.
J Add lines G and I.
Multiply by the Derating Factor
Total ampere hours required
1 The FACP can only support 5 devices with LEDs on. The current draw has been added to the panels alarm current.
2 Total does not include isolator devices or accessory bases
3 If using 24 VDC aux power only. No standby or alarm current is needed for battery calculation if using 24 VAC, 120 VAC, or 240 VAC.
4 Maximum SBUS address capacity is determined by the amount of SBUS bandwidth consumed by each SBUS module. Refer to
Section 4.6.2 for SBUS limitations.
5 If using door holders, you do not need to consider door holder current for alarm/battery standby, because power is removed during that
time. However, during normal operation, door holders draw current and must be included in the 1.0A total current that can be drawn from
the panel.
6 Use next size battery with capacity greater than required.
3.5.5 Maximum Battery Standby Load
Table 3.5 and Table 3.6 show the standby load calculations for the IFP-300 based on 24 and 90 hours of standby. The standby load calcula-
tions of line D in the Current Draw Calculation Worksheet must be less than the number shown in Table 3.5 and Table 3.6 for the selected
battery size, standby hour and alarm time. The numbers below have a built in 20% de-rating factor for the battery amp-hour capacity.
Table 3.6 Maximum Battery Standby Loads for 90 Hour Standby (FM Applications Only)
WARNING: BATTERY SIZE
!
FARENHYT DOES NOT SUPPORT THE USE OF BATTERIES SMALLER THAN THOSE LISTED IN TABLE 3.5 AND
TABLE 3.6. IF YOU USE A BATTERY TOO SMALL FOR THE INSTALLATION, THE SYSTEM COULD OVERLOAD THE
BATTERY RESULTING IN THE INSTALLATION HAVING LESS THAN THE REQUIRED 24 HOURS STANDBY POWER. USE
TABLE 3.5 AND TABLE 3.6 TO CALCULATE THE CORRECT BATTERY AMP HOUR RATING NEEDED FOR YOUR
INSTALLATION. IT IS RECOMMENDED THAT YOU REPLACE BATTERIES EVERY FIVE YEARS.
IFP-300 Series Manual — P/N LS10145-001SK-E:C 4/6/2022
Device # of Devices
6
Table 3.4 Current Calculation Worksheet for SD Devices (Continued)
Rechargeable 24 hr Standby,
Battery Size 5 mins. Alarm
17AH 535mA
18AH 569mA
24AH 769 mA
33AH 1.07A
35AH 1.14A
40AH 1.30A
55AH 1.80A
Table 3.5 :Maximum Battery Standby Loads for 24 Hour Standby
Rechargeable 90 hr Standby,
Battery Size 5 min alarm
33 AH
40 AH 347mA
55 AH 480mA
Current per Device
Standby:
Alarm:
Alarm:
Alarm:
Alarm:
Total standby AH
24 hr Standby,
15 min alarm
473mA
506mA
706mA
1.01A
1.07A
1.24A
1.74A
90 hr Standby,
15 min alarm
N/A N/A
331mA
464mA
Prerequisites for Installation
Standby
Current
75 mA
205 mA
mA
mA
mA
Total alarm AH
24 hr Standby,
20 min alarm
442mA
475mA
675mA
975mA
1.04A
1.21A
1.71A
90 hr Standby,
20 min alarm
N/A
322mA
456mA
Alarm Current
mA
mA
mA
mA
mA
mA
mA mA
A A
H
AH
H
AH
AH
1.25
AH
29