34 IFP-75 Series Manual — P/N LS10147-001SK-E:E 4/6/2022
Control Panel Installation Wiring Specifications
Wiring Distance Calculation Example
Suppose a system is configured with the following SBUS modules:
2 - RA-1000 Fire Annunciators
1 - 5496 Intelligent Power Expander
1 - 5865 LED Fire Annunciator
1 - 5824 Parallel/Serial Interface
The total worst case current is calculated as follows:
Using this value, and referring to the Wiring Distance table, it can be found that the available options are:
• 370 feet maximum using 22 Gauge wire
• 938 feet maximum using 18 Gauge wire
• 1493 feet maximum using 16 Gauge wire
• 2362 feet maximum using 14 Gauge wire
4.6.3 Wiring Configurations
Figure 4.11 illustrates the Class B configuration.
How to Power SBUS Devices From an Auxiliary Power Supply
Figure 4.12 illustrates how to power SBUS devices from an auxiliary power supply such as the 5495 or 5499, when the maximum number of
SBUS devices exceeds the FACP SBUS power requirements.
16 4.02
14 2.54
RA-1000 Current Draw = 2 x 0.100 amps = 0.200 amps
5496 Current Draw = 1 x 0.010 amps = 0.010 amps
5865 Current Draw = 1 x 0.200 amps = 0.200 amps
5824 Current Draw = 1 x 0.045 amps = 0.045 amps
Total Worst Case Current Draw = 0.455 amps
Wire Gauge Ohms per 1000 feet (Rpu)
Table 4.9 Typical Wire Resistance Per 1,000 ft.
NO NC C
TROUBLE
SLC IN
+
_
SLC OUT SLC PROG
+
_
+
_
SBUS
A
B
+
_
NAC 1
NAC 2
supervised,
power-limited
Figure 4.11 SBUS Class B Wiring
FACP
SBUS device
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