• The FLM‑420/4‑CON Conventional Interface Modules allow conventional detectors to be connected to LSN fire panels via a 4‑wire supply network (Local SecurityNetwork LSN with external power supply). The interface modules in the 420 series have been specially developed for connecting to the Local SecurityNetwork LSN improved version and offer the enhanced functionality. In classic mode, selected via the integrated rotary switches, the interface modules can be connected to all classic LSN fire panels.

•  Can be used with a wide range of conventional detectors
• Monitoring of primary lines for alarms, short circuits and wire breaks 
• Conventional detectors can be connected in two stubs or one loop 
• Individual detector parameters can be programmed for each stub 
• Maintains LSN loop functions in the event of wire interruption or short-circuit thanks to two integrated isolators

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FLM-420/4-CON-S Interface module conventional use

Certifications and approvals
Complies with

• EN54-17:2005

• EN54-18:2005