User Manual

IntelliKnight 5808 Installation Manual 151274-L8
3-5
3.6 Calculating Current Draw and Standby Battery
This section is for helping you determine the current draw and standby battery needs if you are using SK
addressable devices (Table 3-2) or SD addressable devices (Table 3-3).
3.6.1 Current Draw Worksheet Requirements
The following steps must be taken when determining 5808 current draw and standby battery requirements.
1. Use the Current Draw Worksheet to determine current draw and standby battery requirements. Use Table 3-
2 if installing SK SLC Devices and Table 3-3 if installing SD SLC Devices to determine current draw. For
the 5808, the worst case current draw is listed for the panel, addressable devices, and all SBUS expanders.
Fill in the number of addressable devices that will be used in the system and compute the current draw
requirements for alarm and standby. Record this information in the Current Draw Worksheet on Line A.
2. Add up the current draw for all auxiliary devices and record in the table at Line B.
3. Add up all notification appliance loads and record in the table at Line C.
4. For notification appliance circuits and auxiliary devices not mentioned in the manual, refer to the device
manual for the current ratings.
5. Make sure that the total alarm current you calculated, including current for the panel itself, does not exceed
6.0 A. This is the maximum alarm current for the 5808 control panel.
If the current is above 6.0 A you will need to use a notification power expander(s) such as the Silent Knight
5496 intelligent power module, to distribute the power loads so that the 5808 or the power expanders do not
exceed their power rating. Refer to the current draw worksheets provided with the 5496 manual so you do
not exceed their power requirements.
6. Complete the remaining instructions in the appropriate Current Draw Worksheet for determining battery size
requirements.
3.6.1.1 Current Draw Worksheet for SK SLC Devices
Use Table 3-2 to determine current requirements during alarm/battery standby operation when SK SLC devices
are installed. You can install up to 99 SK detectors and 99 SK modules. (Copy the page if additional space is
required.)
Table 3-2: Current Draw Worksheet for SK Devices
Device
Number
of
Devices
Current per Device
Standby
Current
Alarm
Current
For each device use this formula: This column X This column = Current per number of devices.
Fire Panel (Current draw from
battery)
1 Standby: 170 mA 170 mA
Alarm: 365 mA 365 mA
Addressable SLC Detectors