- Relay function or fan control function selectable
- Rotary switches for automatic or manual address setting
- LED display for operating state (can be deactivated with LSN)
- Maintains LSN loop functions in the event of wire interruption or short-circuit thanks to two integrated isolators
- Available with surface-mounted housing or DIN rail adapte
The FLM‑420‑RHV high voltage relay interface
modules are used to control the activation of external elements such as
smoke dampers or fans (FAN function) via the LSN.