Bosch FPA‑5000 System Information page 37

Modular fire panel
Example 2:
You want to know the maximum number of network elements for a given cable length and an
average current consumption of the network elements (L = 1000 m, I
the Y axis at 1000, go horizontally across to the right as far as the 20 mA curve and then from
the point of intersection vertically down to the X axis. Read off the maximum number of
network elements, in this example it is 8.
Notice!
Remote indicators activated by the detector C point:
A maximum additional cable length of 500 m is allowed when using remote indicators (e.g.
FAA-420-RI-DIN/FAA-420-RI-ROW). The total length of installed cable must not exceed the
limit of 1600 m.
L [m]
2 0 0 0
1 8 0 0
1 6 0 0
1 4 0 0
1 2 0 0
1 0 0 0
8 0 0
b
6 0 0
2 0 m A
4 0 0
2 0 0
0
0 1 0 2 0
Figure 3.2: Diagram for determining the maximum achievable cable length: LSN classic elements with LSN 0300 A
L =
N =
a =
b =
c =
Bosch Sicherheitssysteme GmbH
1 0 m A
7 5 , m A
3 0 4 0 5 0
cable length in meters
number of LSN classic elements
1600 m limit
300 mA limit
maximum possible number of LSN classic elements = 127
System Information
5 m A
4 5 , m A
4 m A
3 5 ,
6 0 7 0 8 0
= 20 mA). Starting from
NE
m A
3 m A
2 5 , m A
9 0 1 0 0 1 1 0
07.2020 | 12.0 | F.01U.028.089
Planning | en 37
c
0 4 , m A
a
0 7 , m A
1 m A
1 5 , m A
2 m A
N
1 2 0 1 3 0