Honeywell SILENT KNIGHT 5496 - Battery Standby Load Calculations; Maximum Battery Standby Load Table; Current Draw Calculation Worksheet

8 5496 Intelligent Power Module Manual — P/N 151276-L8:F2 2/15/2022
Prerequisites for Installation Calculating Current Draw and Standby Battery
2.4.2 Maximum Battery Standby Load
Table 2.1 shows the maximum battery standby load for the 5496 based on 24 and 60 hours of standby. The numbers below have a built in
20% derating factor for the battery amp-hour capacity. The standby load calculations of line J in the Current Draw Calculation Worksheet
(Table 2.2) must be less than the number shown in Table 2.1 for the battery size used and standby hours required.
2.4.3 Current Draw Worksheet
For each 5496 in the installation, use this worksheet to determine current requirements during alarm/battery standby operation. (Copy this
page if additional space is required.
Figure 2.1 Wire Routing Example
Rechargeable
Battery Size
*
* Max battery size for FM (Factory Mutual) installations is 33AH.
Max. Load for 24 hrs. Standby,
5 mins. Alarm
Max. Load for 60 hrs. Standby
†
,
5 mins. Alarm
† Required for NFPA 72 Auxiliary Protected Fire Alarm systems for Fire Alarm Service (City Box) and Remote Station
Protected Fire Alarm systems (Polarity Reversal) and Digital Alarm Communicator/Transmitter (DACT).
7 AH 270 mA 105 mA
12 AH 475 mA 190 mA
18 AH 685 mA 270 mA
35 AH 1370 mA 540 mA
Table 2.1 Maximum Battery Standby Load
Device
Number of
Devices
Current per Device
Standby
Current
Alarm Current
For each device use this formula: This column X This column = Current per number of devices.
5496 Intelligent Power Module
(Current draw from battery)
1 Standby: 40 mA 40 mA
Alarm: 160 mA 160 mA
A
5496 Current
40 mA 160 mA
Auxiliary Devices Refer to device manual for current ratings.
Alarm/Standby mA mA mA
Alarm/Standby mA mA mA
Alarm/Standby mA mA mA
Alarm/Standby mA mA mA
B
Auxiliary Devices Current
mA mA
Notification appliances Refer to device manual for current ratings.
Alarm:
mA 0 mA mA
Alarm:
mA 0 mA mA
Alarm:
mA 0 mA mA
Alarm:
mA 0 mA mA
C Notification Appliances Current
0 mA mA
D Total current ratings of all devices in system (line A + line B + line C) mA mA
E Total current ratings converted to amperes (line D x 0.001): A A
F Number of standby hours (24 or 60 for NFPA 72, Chapter 1, 1-5.2.5). H
G Multiply lines E and F. Total standby AH AH
H Alarm sounding period in hours. (For example, 5 minutes = 0.0833 hours.) H
I Multiply lines E and H. Total alarm AH AH
J Add lines G and I. Total standby and alarm AH AH
Table 2.2 Current Draw Calculation Worksheet