Bosch FPA-5000 System Information Manual page 26

26 en | Planning
The LSN improved version allows T-taps on stubs or loops and any number of nodes, branches
per node and elements per branch as long as the maximum number of elements does not
exceed 254.
Connections can be positioned anywhere along the LSN line.
Notice!
Planning should take the anticipated total current and line resistance into account to ensure
each detector has an operating voltage of at least 15 V DC.
As soon as an LSN classic device is in a loop or stub, only loop or stub structures can be
used. In this case, T-tapping is no longer possible.
1: Loop
4: 1 or 2 stubs and T-taps
mixed
Table 3.1: Possible structures in LSN
When configuring the detectors, it is essential to ensure that no mesh structures are created.
FPA-5000
Mesh structures within a stub structure Mesh structures within a loop structure
Table 3.2: Unusable network structures
09.2017 | 11.3 | F.01U.028.089
FPA-5000
FPA-5000
System Information
FPA-5000
2: 1 or 2 stubs
FPA-5000
5: Loop and stubs mixed with
T-taps
FPA-5000
Modular Fire Panel
FPA-5000
3: T-tap
Bosch Sicherheitssysteme GmbH