Instruction manual

P84905-001 G
Sheet 32 of 37
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. Amps
*Note: If the PS-EXP is installed in the PS-8, use 0.164 Amps for Standby current.
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)
(For 24 hour standby / 30 min. alarm, up to 0.110 Amps maximum – using 12 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 Amps*
Total Alarm Current Draw:
*NOTE: If a PS-EXP Board is used use 0.184 Amps in the PS-8 “Total Current Draw” box.
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.
For 30 Minutes of Alarm, multiply by 0.5 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.