SILENT KNIGHT 5700 Especificaciones Pagina 25

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Before You Begin Installing
151295 3-5
3.6 Calculating Current Draw and Standby Battery
This section is for helping you determine the current draw and standby battery needs.
3.6.1 Worksheet Requirements
The following steps must be taken when determining 5700 current draw and standby battery
requirements.
1. For the 5700, 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 sys-
tem and compute the current draw requirements for alarm and standby. Record this infor-
mation in the Current Calculation Worksheet at 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 2.5 A. This is the maximum alarm current for the 5700 control panel.
If the current is above 2.5 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
5700 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 require-
ments.
6. Complete the remaining instructions in the Current Calculation Worksheet for determining
battery size requirements.
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