Honeywell GF505 - Wiring Configuration

Installation ANN-BUS Devices
Exception: When using the GFANN-RLY module, the installer must ensure that the maximum 24VDC power line drop does not exceed
0.3 volts. This results in the following wiring limitations:
Wiring Distance Calculation Example:
Suppose a system is configured with the following ANN-BUS modules:
• 3 GFANN-80 modules
The total worst case current is calculated as follows:
Using this value and referring to the Wiring Distance Table 2.2 on page 33, it can be found that the available options are:
 926 feet maximum using 22 Gauge wire
 2,344 feet maximum using 18 Gauge wire
 3,731 feet maximum using 16 Gauge wire
 5,906 feet maximum using 14 Gauge wire
Wiring Configuration
Figure 2.19 illustrates the wiring between the FACP’s Primary ANN-BUS and ANN-BUS devices.
Maximum Wire Length (feet)
(6,000 feet maximum)
= Maximum Resistance (Ohms) *500
Rpu
where: Rpu = Ohms per 1,000 feet for various Wire Gauges (see table below)
Wire Gauge Ohms per 1,000 feet (Rpu)
22 16.2
18 6.4
16 4.02
14 2.54
Wire Gauge Maximum Wire Length
18 312 feet
16 497 feet
14 787 feet
12 1,250 feet
GFANN-80 Current Draw = 3 X 0.040 amps = 0.120 amps
Total Worst Case Current Draw = 0.120 amps
Figure 2.19 FACP wiring to ANN-BUS Device on Primary ANN-BUS
FACP
GFANN-80
ANN-BUS and power wiring are
supervised and power-limited
TB3
Primary ANN-BUS
ann80to5x.wmf
34 GF505 & GF510 Manual — P/N 53164:B5 6/12/2018