RPS-1000 / RPS-1000B Manual - P/N 151153:N 08/09/2017
18
Wiring Specifications
Before You Begin Installing
Wiring Distance calculation example:
Suppose a system is configured with the following SBUS modules:
2 - RA-1000 Fire Annunciator
1 - RPS-1000 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
0.700
265 ft.
670 ft.
1066 ft.
1687 ft.
0.800
231 ft.
586 ft.
933 ft.
1476 ft.
0.900
206 ft.
521 ft.
829 ft.
1312 ft.
1.000 (Max)
185 ft.
469 ft.
746 ft.
1181 ft.
Table 2.7 Wire Distances Per Wire Gauge
Wiring Distance: SBUS Modules to Panel
Total Worst Case
Current Draw (amps)
22 Gauge
18 Gauge
16 Gauge
14 Gauge
NOTE:
The following formulas were used to generate the wire distance chart
Maximum Resistance (Ohms) =
6.0 Volts
Total Worst Case Current Draw (amps)
Maximum Wire Length (Feet) =
(6000 feet maximum)
Maximum Resistance (Ohms)
* 500
Rpu
where: Rpu = Ohms per 1000 feet for various Wire Gauges (see table below)
Table 2.8 Typical Wire Resistance Per 1000 ft.
Wire Gauge
Ohms per 1000 feet (Rpu)
22
16.2
18
6.4
16
4.02
14
2.54
RA-1000 Current Draw
= 2 x .100 amps
= .200 amps
RPS-1000 Current Draw
= 1 x .010 amps
= .010 amps
5865 Current Draw
= 1 x .200 amps
= .200 amps
5824 Current Draw
= 1 x .040 amps
= .040 amps
Total Worst Case Current Draw
= .450 amps
Summary of Contents for Farenhyt RPS-1000
Page 49: ......
