Calculating Current Draw And Standby Battery; Current Draw Worksheet Requirements - Honeywell Silent Knight IntelliKnight 5820XL Installation And Operation Manual

IntelliKnight 5820XL Installation Manual
3.6

Calculating Current Draw and Standby Battery

This section is for helping you determine the current draw and standby battery needs for your
installation.
3.6.1

Current Draw Worksheet Requirements

The following steps must be taken when determining 5820XL current draw and standby
battery requirements.
1. You will use the Current Draw Worksheet (Table 3-1) to determine current draw and
standby battery requirements. For the 5820XL, the worst case current draw is listed for the
panel, addressable devices, and all SBUS expanders. Fill in the number of addressable
devices and expanders that will be used in the system and compute the current draw
requirements for alarm and standby. Record this information in the Current Draw Work-
sheet 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 appliances 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 5820XL 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 5495 or the 5895XL intelligent power expander, to distribute the power
loads so that the 5820XL or the power expanders do not exceed their power rating. Refer
to the current draw worksheets provided with the 5495 or the 5895XL manuals so you do
not exceed their power requirements.
6. Complete the remaining instructions in the Current Draw Worksheet for determining bat-
tery size requirements.
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