Standby Battery Calculation - Bosch ICP-EZM2 Installer's Manual

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7.3

Standby Battery Calculation

Use the following formula to calculate standby battery capacity for 24 hr of standby power and 4 to 30 minutes
of alarm power:
(Total B _____ x 24 hr) + (Total C _____ x Y hr*) + 10% reserve = Total battery Ah required
* Y hr =
For UL-approved residential applications (household), Y = 0.067 (4 minutes)
-
For UL-approved commercial applications, Y = 0.25 (15 minutes)
-
For ULC-approved commercial applications, Y = 0.50 (30 minutes)
-
If the Column C total exceeds 1.4 A, use an external power supply.
Model Number Quantity
Used
Control Panel
Control Center
Wireless Hub
(IWT-WSN-N1-86)
DX2010
Sounders Connected to PO 4
D118 8 Ω Speaker
Ratings of other devices in system that are not shown above
Bosch Security Systems, Inc. | 5/07 | F01U025147-01
Easy Series (ICP-EZM2) | Installer Guide | 7.0 Reference Materials
A
AC Power On
Normal Current
Each Total
Unit (mA)
(mA)
85 x 1 = 85
110 x Qty =
30 x 1 = 30
35 x Qty =
0 x Qty = 0
x Qty =
x Qty =
x Qty =
x Qty =
x Qty =
x Qty =
Total
=
A
B
AC Power Off
Minimum Current
Each Total
Unit (mA)
(mA)
85 x 1 = 85
110 x Qty =
30 x 1 = 30
35 x Qty =
0 x Qty = 0
x Qty =
x Qty =
x Qty =
x Qty =
x Qty =
x Qty =
Total
=
B
C
In Alarm
Maximum Current
Each Total
Unit (mA)
(mA)
160 x 1 = 160
165 x Qty =
30 x 1 = 30
35 x Qty =
330 x Qty =
x Qty =
x Qty =
x Qty =
x Qty =
x Qty =
x Qty =
Total
=
C
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