Structures In Local Security Network - Bosch FPA-5000 System Information Manual

Modular Fire Panel
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LSN Modules
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Technical Data and System Limits
Refer to the system limits in System Limits, page 143.
The technical data for all components can be found in Technical Data, page 143.
3.2

Structures in Local Security Network

In a Local Security Network (LSN classic), fire detectors can be configured as a loop or as one
or two stubs.
In an improved version Local Security Network (LSN improved), the detectors can be
configured as a loop, a stub or T-tap or in any mixed loop or T-tap structures. However, it is
important to note that mesh structures cannot be created.
Bosch Sicherheitssysteme GmbH
Terminating each stub and each T-tap with EOL modules is essential to set up a complete
fire alarm system complying with EN 54-13.
Conventional detectors approved for the FPA-5000 can be connected using one of the
following methods:
– Using the CZM 0004 A 4 Zone Conventional Module
The module provides four DC primary lines (zones).
– Using an FLM-420/4‑CON GLT interface module on the LSN bus for two zones
Consider the system limit for the number of LSN elements.
When selecting the address cards, note:
Each element and input which is able to set off an alarm requires a detection point.
Inputs are considered as detection points if they are programmed accordingly using the
FSP-5000-RPS Programming Software. Refer to Detection Points, page 27.
In accordance with EN 54-2, no more than 512 detectors and their functions may fail if a
system component fails. The corresponding measures are described under Redundancy,
page 40 .
12 V/45 Ah batteries can only be used with the frame installation housings.
Use fuses complying with national regulations to protect the power lines.
Recommended fire detector cable: J-Y(St)Y 2 x 2 x 0,8 mm, red.
It is possible to combine LSN interface modules, LSN detectors and notification
appliances on one loop or stub line.
For a mixed connection of LSN classic elements and LSN improved elements, a maximum
of 127 elements are permitted.
The use of unshielded cables is possible.
Limits per LSN 0300 module:
– Up to 127 LSN classic elements or 254 LSN improved elements can be connected
– Current consumption of up to 300 mA
– Cable length of up to 1600 m (see also Achievable Cable Length with LSN 0300 A,
page 28)
Limits per LSN 1500 module:
– Up to 127 LSN classic elements or 254 LSN improved elements can be connected
– Up to 1500 mA current consumption if LSN improved elements are connected
– Up to 300 mA current consumption if LSN classic elements are connected
– Cable length of up to 3000 m
As stipulated by EN 54‑2, systems with more than 512 LSN elements must be connected
redundantly. This is ensured by using a second basic housing with an additional panel
controller. A CRP 0000 A cable set is required for redundant connection.
System Information
Planning | en 25
09.2017 | 11.3 | F.01U.028.089