Bosch ICP-EZM2 - Standby Battery Calculation

Phone line trouble voltage Trouble condition occurs when the phone line voltage is between 1.10 V
and 4.75 V
Control Panel Power Requirements
AC Input Line Voltage Use a UL Listed 18 V Class 2 transformer (22 VAC, VA 50/60 Hz)
Total Alarm Power: 1.4 A (AC power and standby battery; intrusion applications only).
With a 7.0 Ah battery, the following current draws apply to all outputs and
devices connected to the system:
– Up to 170 mA for 24 hr for fire and combined fire/burglary
applications
– Up to 1.2 A for other applications
Auxiliary Power: 12 VDC, 1.0 A maximum. Includes 110 mA for each control center
connected to the system, and up to 400 mA for the programmable
outputs.
Current Draw: 85 mA standby; 160 mA alarm with all outputs activated
Voltage: 12 VDC nominal (11.2 VDC to 12.3 VDC)
The control panel stops processing point faults when the voltage drops
below 9.5 VDC.
Battery: D126 (7 Ah) or D1218 (18 Ah) sealed, lead acid rechargeable
1.7 A maximum recharging current
Low battery condition occurs when battery drops below 12 VDC
If AC power fails and the battery drops below 9.5 VDC, the control panel
stops processing point faults. Disconnect the battery under these
conditions.
Maximum auxiliary current to recharge standby battery within 72 hours:
– 12 V, 7 Ah Battery: 400 mA
– 12 V, 18 Ah Battery: 900 mA
In an NF A2P certified installation, use a battery Yuasa NP17-12IFR
Standby Battery Calculation
Use the following formula to calculate standby battery capacity for 24 hr of standby power:
(Total B _____ x 24 hr) + (Total C _____ x 0.067 hr) + 10% reserve = Total battery Ah requiredIf
the Column C total exceeds 1.4 A, use an external power supply.
A
AC Power On Normal
Current
B
AC Power Off Minimum
Current
C
In Alarm Maximum Current
Model Qty
Used
Each Unit
(mA)
Total
(mA)
Each Unit
(mA)
Total
(mA)
Each Unit
(mA)
Total
(mA)
Control Panel 85 x1 85 85 x1 85 160 x1 160
Control
Center
110 x Qty 110 xQty 165 xQty
8.1.1
Easy Series Control Panel Device Specifications and Overview | en 69
Bosch Security Systems, Inc. System Reference Guide 2014.09 | 01 | F.01U.306.221