SilentKnight 5496 6A Intelligent Remote Power Supply - Manual (Page 10)

Model 5496 Intelligent Power Module Installation and Operation Manual
2-4 151276
2.6 Calculating Current Draw and Standby Battery
This section is for helping you determine the current draw and standby battery needs for your
installation.
2.6.1 Worksheet Requirements
Follow the steps below to determine 5496 current draw and standby battery requirements.
Filling in the Current Draw Worksheet
Refer Table 2-4 in Section 2.6.2 to complete the following steps.
1. Add up the current draw for all auxiliary devices and record in the table at Line B.
2. Add up all notification appliance loads and record in the table at Line C.
3. For notification appliances and auxiliary devices not mentioned in the manual, refer to the
device manual for the current ratings.
4. Make sure that the total alarm current you calculated, including current for the panel itself,
does not exceed 6.0 A. This is the maximum alarm current allowable.
5. Complete the remaining instructions in Table 2-4 to determine battery size requirements.
2.6.1.1 Maximum Battery Standby Load
Table 2-3 shows the maximum battery standby load for the 5496 based on 24 and 60 hours of
standby. The standby load calculations of line J in the Current Draw Calculation Worksheet
(Table 2-4) must be less than the number shown in Table 2-3 for the battery size used and
standby hours required.
Note: 33 max battery size for FM (Factory Mutual) installations
Table 2-3: Maximum Battery Standby Load
Rechargeable
Battery Size
Max. Load for 24 hrs. Standby,
5 mins. Alarm
*Max. Load for 60 hrs. Standby, 5
mins. Alarm
7 AH 270 mA 105 mA
12 AH 475 mA 190 mA
18 AH 685 mA 270 mA
35 AH 1370 mA 540 mA
* 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).