Honeywell INTELLIKNIGHT 5820XL - Manual (Page 31)

Before You Begin Installation
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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 5820XL current draw and
standby battery requirements.
1. You will 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. 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 Worksheet on Line A.
2. Add up the current draw for all auxiliary devices and record in the table on Line B.
3. Add up the current draw for all notification appliances and record in the table on
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 dis-
tribute the power loads so that the 5820XL or the power expanders do not exceed
their power ratings. Refer to the current draw worksheets provided with the 5495
or the 5895XL manuals so you do not exceed their power ratings.
6. Complete the remaining instructions in the appropriate Current Draw Worksheet
for determining battery size requirements.