151430-L8 Before You Begin Installation
3-8
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 or use Table 3-2 if installing SD 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 on Line B.
3. Add up the current draw for all notification appliance loads 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
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 5496 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 ratings. Refer to the current draw work-
sheets provided with the 5496 or the RPS-1000 manuals so you do not exceed their power ratings.
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 determining 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 points max per panel) and 159 IDP modules per
loop (636 points max per panel). Copy this section if additional space is required.
Table 3-1: Current Draw Worksheet for IDP SLC Devices
Device # 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 (Battery current draw) 1
Standby: 290 mA 290 mA
Alarm: 570 mA 570 mA
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