Honeywell Farenhyt Series Installation And Operation Manual page 36

NOTE: Refer to Table 3.2 if using IDP, Table 3.3 for SK, and Table 3.4 if using SD SLC devices for maximum number of each type of device
that can be used per system
After calculating the total worst case current draw, Table 4.2 specifies the maximum distance the modules can be located from the panel
on a single wire run. The table insures 6.0 volts of line drop maximum. In general, the wire length is limited by resistance, but for heavier
wire gauges, capacitance is the limiting factor.
* All devices must use the same SBUS and VBUS.
These cases are marked in the chart with an asterisk (*). Maximum length can never be more than 6,000 feet, regardless of gauge used.
(The formula used to generate this chart is shown in the note below).
Total Worst Case
Current Draw (amps)
0.100
0.200
0.300
0.400
0.500
0.600
0.700
0.800
0.900
1.000 (Max)
29
Model Number
RA-2000, RA-1000, RA-100 Fire Annunciator
6815 SLC Loop Expander
5815XL SLC Loop Expander
5824 Serial/Parallel Printer Interface Module
5880 LED I/O Module
5865 LED Annunciator
RPS-1000 Intelligent Power Supply
5496 NAC Expander
ECS-50W
ECS-125W
ECS-VCM / ECS-VCM with ECS-SW24*
ECS-NVCM Network Voice Control Module
ECS-EMG NVCM keypad
ECS-LOC
ECS-DUAL50W
ECS-DUAL50W WITH ECS-50WBU
SK-NIC Network Interface Card
CELL-MOD/CELL-CAB-SK
SK-F485C Fiber Converter
Table 4.1 SBUS Device Current Draw
Wiring Distance: SBUS Modules to Panel
22 Gauge
1852 ft.
926 ft.
617 ft.
463 ft.
370 ft.
309 ft.
265 ft.
231 ft.
206 ft.
185 ft.
Table 4.2 Wiring Distances Per Wire Gauge Using Copper Wire
IFP-300 / IFP-300ECS Manual P/N LS10145-001SK-E:B 12/18/2017
Worst Case Current
Draw
.120 amps
.078 amps
.150 amps
.040 amps
.250 amps
.200 amps
.010 amps
.010 amps
.010 amps
.010 amps
.115 amps /.185 amps
.059 amps
.06 amps
.210 amps /.325 amps
.010 amps
.010 amps
.021 amps
.145 amps
.125 amps
18 Gauge 16 Gauge
4688 ft. * 6000 ft.
2344 ft. 3731 ft.
1563 ft. 2488 ft.
1172 ft. 1866 ft.
938 ft. 1493 ft.
781 ft. 1244 ft.
670 ft. 1066 ft.
586 ft. 933 ft.
521 ft. 829 ft.
469 ft. 746 ft.
14 Gauge
* 6000 ft.
5906 ft.
3937 ft.
2953 ft.
2362 ft.
1969 ft.
1687 ft.
1476 ft.
1312 ft.
1181 ft.