Technical data

Chapter 11: Battery Backup Calculation Worksheet

SP40S BATTERY CALCULATION SHEET

STANBY CURRENT CALCULATIONS

1. The Standby Current for the SP40S is 0.130 Amps. ______________Amps

2. Enter Auxiliary Current (If Applicable) ______________Amps

3. Add Steps 1 and 2. Multiply by the number of hours required.

24 Hours – Multiply by 24 ______________Hrs

TOTAL STANDBY CAPACITY IN AMP HOURS ______________Ah

ALARM CURRENT CALCULATIONS

NOTE: DO NOT EXCEED 40 WATTS.

Good engineering practices call for amplifier to operate at 85% Max wattage.

1. List the speaker and strobe requirements.

NOTIFICATION

APPLIANCE

SPEAKER

WATTAGE

STROBE

CURRENT

2. Calculate total Strobe current. (2. Amps Max.) ______________Amps

3. Calculate total speaker wattage. (40 Watts Max.) ____________

4. Multiply the total speaker wattage on line 3 by 0.054. ______________Amps

5 Add Auxiliary Current (if applicable) ______________Amps

6. Add Steps 2,4 and 5 together. (4.66 Amps Max.) ______________Amps

7. Multiply Step 6 by 0.25 (This represents 15 minutes of alarm.) ______________ Hrs

8 Total Alarm Capacity in Amps-Hours. ______________ Ah

BACKUP BATTERY REQUIREMENS

1. Enter Standby Capacity. ______________ Ah

2. Enter Alarm Capacity. ______________ Ah

3. Add Steps 1 and 2 together. ______________ Ah

Multiply Step 3 by 1.1 for minimum Backup Battery Requirements ______________Ah

NOTE: THE UL LISTED BACKUP BATTERIES FOR THIS PANEL ARE TWO 12 VOLT,

12 Ah.

SP40S Multi-Function Facility Communication System Manual, Revision D