SilentKnight 5104 Digital Alarm Communicator Transmitter 6 Zone - Manual (Page 15)

Installation 151053-L8
3-7
3.5 Calculating Current Draw and Standby Battery
This section should be used to help you determine the current draw and standby battery needs for your
installation.
3.5.1 Worksheet Requirements
The following steps must be taken when determining the 5104 current draw and standby battery requirements.
Fill in the Current Draw Worksheet (Table 3-6) in section 3.5.2.
For the 5104, the worst case current draw is listed in Table 3-6 for the panel and accessory devices.
Follow these steps to properly fill in the Current Draw Worksheet.
1. Fill in the number of devices used.
2. Compute the current draw requirements for alarm and standby and record this data into line A.
3. Add up the current draw for all the smoke detectors and record the totals in line B.
4. Total all the notification appliance device loads and enter that number into line C.
5. Make sure that the alarm current you calculated, including current for the panel itself, does not exceed 750
mA. This is the maximum current allowable.
6. Complete the remaining instructions in Table 3-6 to determine battery size requirements.
3.5.1.1 Maximum Battery Standby Load
Table 3-5 shows the maximum battery standby load for the 5104 based on 24 and 60 hours of standby. the
standby load calculations of line D in Table 3-6 must be less than the number shown in Table 3-5 for the battery
size used and standby hours required.
Table 3-5: maximum Battery Standby Load
Rechargeable Battery
Size
Maximum Load for 24
hrs. Standby, 5 min.
Alarm
Maximum Load for 60
hrs. Standby, 5 min.
Alarm
7 AH 275 mA 105 mA