Before You Begin Installing
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3-7
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 IFP-2000 current draw and standby
battery requirements.
1. You will use the Current Draw Worksheet to determine current draw and standby battery
requirements. Use Table 3-1 if installing IDP SLC Devices. For the IFP-2000, 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 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 9.0 A. This is the maximum alarm current for the IFP-2000 control panel.
If the current is above 9.0 A you will need to use a notification power expander(s) such as
the Silent Knight 5495 or the RPS-1000 intelligent power expander, to distribute the
power loads so that the IFP-2000 or the power expanders do not exceed their power rating.
Refer to the current draw worksheets provided with the 5495 or the RPS-1000 manuals so
you do not exceed their power requirements.
6. Alternatively, you may network additional IFP-2000s or RPS-2000s to get additional
power
7. Complete the remaining instructions in the appropriate current draw worksheet for deter-
mining battery size requirements.
3.6.2
Current Draw Worksheet for IDP SLC Devices
Use Table 3-1 to determine current requirements during alarm/battery standby operation when
IDP SLC devices are installed. You can install up to 159 IDP sensors per loop (636 max points
per panel)
and
159 IDP modules per loop (636 points max per panel). Copy this section if
additional space is required.
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