IntelliKnight 5820XL Installation Manual
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3.6.2.1 Maximum Battery Standby Load
Table 3-3 shows the maximum battery standby load for the 5820XL based on 24 and 60 hours
of standby. The standby load calculations of line D in the Current Draw Calculation
Worksheet (Table 3-2) must be less than the number shown in Table 3-3 for the battery size
used and standby hours required.
*
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).
Table 3-3: 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
17 AH
685 mA
270 mA
33 AH
1.3 A
540 mA
Warning!
Silent Knight does not support the use of batteries smaller than those listed in Table 3-3. 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 3-2 to calculate the correct battery amperes/hour rating needed for
your installation.
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