8
Battery Calculations
8.0
Battery Calculations
Current Drain for Battery Calculations
The following are the currents for the RAXN-LCD to which is added the number of RAX-1048TZDS
and/or IPS-2424DS or FDX-008W/KI used:
Normal Standby Current
= 139 mA + ___________ x 22 mA + ___________ x 10mA = _______
[
number of RAX-1048TZDS
] [
number of IPS-2424DS
]
Maximum
Alarm
Current
= 164 mA + ___________ x 35 mA + ___________ x 15mA = _______
[
number of RAX-1048TZDS
]
[
number of IPS-2424DS
]
The
Normal Standby Current
is used for battery size calculations (see the Network Fire Alarm
Manual for battery calculations) and includes the current drain for the Trouble Buzzer, Trouble
LED, and one alarm LED. The
Maximum Alarm Current
is used to calculate the wire size
required (see Wiring Table on page 5).
