User guide

Model MS-25 Installation and Operation Manual
3-8 53688
3.6.1.2 Current Draw Worksheet for MS-25C ULC
Use to determine amp-hour requirements during alarm/battery standby operation. (Copy the
page if additional space is required.) You can install up to 25 SLC devices and two ANN-80C
Remote Annunciator. The maximum battery size for ULC installations is 18 Amp/hr.
Table 3-3: Current Calculation Worksheet for Devices for ULC
Device # 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.
Fire Panel (Current draw from
battery)
1
Standby: 165 mA 165 mA
Alarm: 220 mA 220 mA
Accessory Modules
ANN-80C Remote Annunicator
2
Standby: 37 mA mA
Alarm: 40 mA mA
Addressable SLC Detectors
HFS-PA
25 max.
Standby: 0.27 mA
Alarm: 6.5 mA
mA mA
HFS-PTA mA mA
HFS-DA mA mA
HFS-TA mA mA
SD355A mA mA
SD355TA mA mA
D355PLA mA mA
H355A mA mA
Addressable SLC Modules
HFS-MMA
25 max
Standby/Alarm 0.375 mA mA mA
BG-12LX Standby/Alarm 0.375 mA
HFS-MRA Standby/Alarm 0.255mA mA mA
MMF-301A Standby/Alarm 0.375 mA
CRF-300A Standby/Alarm 0.375 mA
I300A 10 max Standby/Alarm 0.45 mA mA mA
A Total System Current
Auxiliary Devices Refer to devices manual for current rating.
Alarm/Standby: mA mA mA
Alarm/Standby: mA mA mA
Alarm/Standby: mA mA mA
B Auxiliary Devices Current
Notification Appliance Circuits Refer to device manual for current rating.
Alarm: mA mA
Alarm: mA
mA
Alarm: mA
mA
C Notification Appliances Current
mA
D Total current ratings of all devices in system (line A + line B + 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): H
G Multiply lines E and F. Total standby AH AH
H Alarm sounding period in hours. (For example, 5 minutes = .0833 hours) H