PRO-2000 Installation and Operation Manual
93
Appendix A - Battery Calculations
Nominal battery voltage should be 24 VDC.
Charging voltage is 2.3V per cell minimum.
Initial charging current is 2.14A total.
Battery capacity requirements calculations
This appendix contains tables used to adequately calculate the battery capacity needed for a specific PRO-2000 panel
configuration.
Seven tables are available for current consumption calculations:
• Standby current consumption of PRO-2000 X2 panels, Main power supply
• Standby current consumption of PRO-2000 X2 panels, Battery Back-up
• Alarm current consumption of PRO-2000 X2 panels, Battery Back-up
• Standby current consumption of PRO-2000 X6 panels, Main power supply
• Standby current consumption of PRO-2000 X6 panels, Battery back-up
• Alarm current consumption of PRO-2000 X6 panels, Battery back-up
• Current consumption of PRO-2000 System components, External power supply
The first six tables are used to calculate the Standby and Alarm current for X2 and X6 panels. The current required by the X0 panels
is included in the calculated current of its host X2 or X6 panel.
For 24 Hours of Supervisory plus 5 minutes of Alarm:
The calculated Standby current on the Main power supply for a panel must not exceed 1.5 Amps.
The calculated Alarm current on the Main power supply for a panel must not exceed 3 Amps.
The battery capacity required for a specific panel configuration can be calculated using the following table and the calculated
Battery Back-up Standby and Alarm currents. The "Current" column is multiplied by the "Time required" column to generate the
values of the "Battery capacity" column. The "Time required" column must be filled in accordance with the authority having
jurisdiction (AHJ) requirements. The total battery capacity required for the panel configuration is the sum of the "Battery capacity"
column to a maximum of 37.8 AH (42AH derated at 10 percent).
Current (Amps) Time required (Hours) Battery capacity (A/H)
Calculated Battery back-up
Standby current
X=
Calculated Battery back-up
Alarm current
X=
TOTAL BATTERY CAPACITY
(Maximum value 37.8AH)
Table 34: Battery Capacity - Panel Specific Configuration
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