Bosch FPA-5000 - Limits of SG 200 Application

Modular Fire Panel Installation/Configuration Notes | en 61
Bosch Sicherheitssysteme GmbH Product Information F.01U.028.089 | 5.4 | 2009.08
Figure 3.4 Diagram for calculating the maximum achievable cable length, using elements with LSN
improved
technology and the LSN 1500 A
3.5 Limits of SG 200 application
The cable resistance depends on the number of acoustic signaling devices.
Limits:
Maximum of 500 mA from the NZM 0002 A. Minimum voltage of 10 V at last SG 200 in loop.
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250
N
L [m]
1mA
3mA
4mA
1,5mA
0,7mA
2mA
2,5mA
5mA
10mA
20mA
7,5mA
a
b =254
1,25mA
0,5mA
0375mA
0,265mA
L = Cable length in meters
N = Number of LSN elements
a = Bus dynamic limit
b = Maximum possible number of LSN
improved
elements = 254
NOTICE!
Remote alarm indications activated by the detector C point:
A maximum 500 m of additional cable length is allowed when using remote displays (e.g.
MPA/FAA-420-RI).
The total length of installed line must not exceed the limit of 3000 m!
Number of
SG 200
Maximum cable
resistance R
L
[Ω]
Maximum cable
length [m]
Maximum distance first
SG 200 - NZM 0002 A [m]
1 300 4100 2050
3 100 1370 685
6 50 685 342
8 40 548 274
10 30 411 205
15 20 274 137