Fire alarm relay contacts → Connect across X8.1 and X8.2. If the relay is NC, it will open on alarm.

Never rely on third-party reproductions. A single misplaced wire – such as confusing N and PE – can destroy the GC 342 circuit board.

The diagram covers several essential connection points for both 1-leaf and 2-leaf systems: Mains Connection : Typically requires a (50-60 Hz) supply connected via a specific connector plug. Safety Sensors

GEZE schematics use specific notation: