POWERPATH PS-8 - Battery Calculation Sheets; PS-8 Battery Calculation

P84905-001 A Sheet 31 of 36
7.0 BATTERY CALCULATION SHEET
7.1 PS-8 BATTERY CALCULATION SHEET
STANDBY CURRENT CALCULATIONS:
1. The Standby Current for the PS-8 is 0.129 Amps. 0.129 Amps
2. If this unit is set for Master Mode, multiply the number of remote units by 0.006 Amps. Amps
If this unit is set for Remote Mode, enter 0 Amps.
3. If you are using AUX in CP Mode, enter the current draw. Amps
If this unit is set for AUX MP Mode, enter 0 Amps.
4. Add Steps 2 and 3 together: Amps
The maximum current available for AUX CP and Master Mode SYNC BUS is.
(For 24 hour standby time, up to 0.240 Amps maximum – using 12 Ahr batteries)
(For 60 hour standby time, up to 0.020 Amps maximum – using 12 Ahr batteries)
(For 72 hour standby time, up to 0.020 Amps maximum – using 33 Ahr batteries)
5. Add Steps 1 and 4 together. Amps
6. Multiply Step 5 by the required standby time in hours. Ahrs
For 24 hour standby time, enter 24, for 60 hour standby time, enter 60.
ALARM CURRENT CALCULATIONS:
1. Fill out the chart below to determine Alarm Current requirements.
Appliance Name
Appliance
Type
Appliance Current Draw Quantity Total Current Draw
PS-8 NAC Extender 0.129 Amps 1 0.129
Total Alarm Current Draw:
2. Multiply the Total Alarm Current Draw by the amount of Alarm time required. Ahrs
For 5 Minutes of Alarm, multiply by 0.083 Hours.
BACKUP BATTERY TOTAL REQUIREMENTS:
1. Add STANDBY CURRENT CALCULATION Step 6 with ALARM CURRENT CALCULATION Step 2. Ahrs
2. Multiply BACKUP BATTERY TOTAL REQUIREMENTS Step 1 by 1.2 for a 20% Safety Margin. Ahrs
This is the minimum size battery needed, rated in Amp-Hours (Ahrs) for your application.