Table of Contents
Advertisement
Installation and Operation Manual
Appendix‐D: Battery Calculations
Total System Currents Calculations
The main AC branch circuit connection for Fire Alarm Control Unit must provide a dedicated continuous
power without provision of any disconnect devices. Use #12 AWG wire with 600 volt insulation and proper
over‐current circuit protection that complies with the local codes. For specifications, refer to the
Specifications and Features section.
Model Number
FW201/FW201C
FW391
FW397
FW327
FW337
FW347
FW357
The total quantities of each loop must <= 252. The total current of field devices per loop is 100 mA @standby,
FW511
FW521
FFW721
FW721C
FW811
FW821
FW831
Table 20 System Currents Calculation
IMPORTANT NOTICE
Functional Unit's Currents (All currents are in ampere)
Description
AMI
PTU
PCU
ALU
NOU
ROU
XNU
Field Devices Currents (All currents are in ampere)
and 220 mA @alarm.
Optical Smoke Detector
Heat Detector
Manual Station
Manual Station (Canada)
Input Module
Input‐Output Module
Relay Module
Qty
Standby
1
× 0.143
1
× NA
1
× 0.065
× 0.027
× 0.036
1
× 0.035
× 0.027
× 0.00014
× 0.0001
× 0.0001
× 0.0001
× 0.00017
× 0.00015
× 0.00015
61
Total
Alarm
Standby
0.146
NA
0.065
0.027
0.054
0.035
0.027
0.001
0.001
0.001
0.001
0.00079
0.00026
0.00026
Total
Alarm
Advertisement
Table of Contents
