ADT Commercial Fire & Burglary Alarm System FOCUS 200 PLUS, Installation And Setup Manual

Page: 132 / 216

FOCUS 200 PLUS Installation and Setup Guide
12-14
Enter the calculated combined current, then add to calculate total battery current.
Table 12: BATTERY CURRENT
Total Battery Current Total Current
Standby Alarm
Combined peripheral totals (see Table 9)
Total PCB current (see Table 11)
Total battery current
(add peripheral totals and PCB totals)
Battery Capacity Calculation Worksheet
Using the total calculated from Table 12, calculate the battery capacity required for the installation.
Capacity Formula
Calculated
Value
Standby Capacity For 4-hour standby time:
Total standby current X 4 hours X 1.4 contingency factor.
For 24-, 60-, or 72-hour standby time:
Total standby current X (24 hours) X 1.1 contingency factor.
(60 hours)
(72 hours)
Alarm Capacity
For 4-, 5-, or 15-minute alarm time
Total alarm current X 0.067 (4 minutes)
0.083 hours (5 minutes)
0.250 hours (15 minutes)
Total Capacity Add standby and alarm capacities
Battery Selection Table
From the following table, select one of the standard-size batteries that has a capacity greater than or
equal to the capacity calculated in the previous worksheet. All the batteries in this table will fit inside
the FOCUS 200 PLUS enclosure.
7AH Yuasa NP12-7
12AH YuasaNP12-12
14AH Yuasa NP7-12 (connect 2 in parallel)
17.2AH Yuasa NPG18-12
24AH Yuasa NP12-12 (connect 2 in parallel)
28AH Yuasa NP7-12 (connect 4 in parallel)
34.4AH Yuasa NPG18-12 (connect 2 in parallel)