Fourier DataNet User Manual page 63

Normally Open will result in the alarm being activated during
alarm status (the circuit will be closed).
Normally Closed will result in the alarm being activated when
logger is not in alarm and therefore deactivated when there is
an alarm (the circuit will be opened).
Connect In-1 to your external alarm device.
Use the Alarm Setup tab in the Setup dialog to define the
logger alarm settings. If these settings are breached then the
alarm will be activated.
Receiver External Alarm
By connecting the external alarm to the Ext Alarm input on
the Receiver, any alarm on the entire network will activate the
external alarm.
Use the Alarm Setup tab in the Setup dialog to define the
logger alarm settings. Whenever the Receiver receives an
alarm status from any logger on the network, the external
alarm will be activated. No additional configuration in the
software is required.
External Alarm Schematic
See the schematic below explaining how to hook up an
external alarm to the DataNet unit.
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