Modular Fire Panel Installation | en 119
Bosch Sicherheitssysteme GmbH System Description F.01U.028.089 | 8.0 | 2011.07
4.9.10 LSN 0300 A LSN improved Module 300 mA
This module enables an LSN loop with up to 254 LSN improved elements or 127 classic LSN
elements to be connected, with a maximum line current of 300 mA and a cable length of up to
1600 m (depending on configuration and cable type).
Figure 4.73 LSN 0300 A LSN improved Module 300 mA
The technical data can be found in Section 7.5.9 LSN 0300 A LSN improved Module 300 mA,
page 162.
NOTICE!
To ensure that the fire detection system is operated in compliance with EN 54-13, each LSN
stub and T-tap must be terminated with EOL modules.
Labeling Connection
LSN loop LSN stub
AUX1 + | AUX1 - Auxiliary power supply Auxiliary power supply for stub 1
LSN a1- | LSN b1+ LSN a1- / LSN b1+ outgoing Stub 1 LSN a1- / Stub 1 LSN b1+
AUX2 + | AUX2 - Auxiliary power supply* Auxiliary power supply for stub 2
LSN a2- | LSN b2+ LSN a2- / LSN b2+ incoming Stub 2 LSN a2- / Stub 2 LSN b2+
* The auxiliary voltage may only be fed back to AUX2 when isolators (ERT technology) are
used in the loop (suitable components include YBO-R/SCI isolators).
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