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ES-200X Series Manual —
P/N LS10131-000FL-E:C 7/25/2018
Installation
Optional Module Installation
In general, the wire length is limited by resistance, but for heavier wire gauges, capacitance is the limiting factor. Maximum length can
never be more than 6,000 feet (1,800 m), regardless of gauge used. The following formulas were used to generate the wire distances:
Exception:
When using the ANN-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 ANN-80 Remote Fire Annunciators
•
1 ANN-S/PG Serial/Parallel Printer Interface Module
The total worst case current is calculated as follows:
Wiring Configuration
Figure 2.17 illustrates the wiring between the FACP’s Primary ANN-BUS and ANN-BUS devices.
Maximum Resistance (Ohms)
=
2.0 Volts
Total Worst Case Current Draw (amps)
Maximum Wire Length (feet)
=
Maximum Resistance (Ohms)
x 500
(6,000 feet maximum)
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
ANN-80 Current Draw
= 3 X 0.040 amps
= 0.120 amps
ANN-S/PG Current Draw
= 1 X.0.040 amps
= 0.040 amps
Total Worst Case Current Draw
= 0.160 amps
TB1
4 3 2 1
+ -
Figure 2.17 Primary ANN-BUS wiring to ANN-BUS Device
ANN-BUS Device
ES-200X
ANN-BUS and power wiring are
supervised and power-limited
24 VDC
nonresettable
Primary
ANN-BUS
e
s
2
0
0
to
a
n
n
8
0
.w
m
f
