SilentKnight 5499 9A Distributed Power Module - Manual (Page 14)

5499 Distributed Power Module Installation Manual
10 151253
Table 4-2: Battery Calculation Worksheet
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.
5499 Distributed Power Module
(Current draw from battery)
1
Standby: 75 mA 75 mA
Alarm: 205 mA 205 mA
A
5499 Current 75 mA 205 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 Device 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 Appliance 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 .001): A A
F
Number of standby hours (24 or 60 for NFPA 72, Chapter 1, 1-5.2.5). 24 Hrs. for
NBC, section 3.2.7.8 H
G Multiply lines E and F. Total standby AH AH
H
Alarm sounding period in hours. In accordance with NBC and ULC.
(For example, 5 minutes = .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
K
Multiply line J by 1.20.
(20% extra insurance to meet desired performance)
Total ampere-hours
required
AH