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Installation of an alarm siren and/or strobe light

All web-based monitoring systems from Didactum are equipped with two 12V DC outputs. You can easily connect alarm sirens with strobe lights or flashing beacons to these relay outputs. Naturally, you can also use the two 12V outputs to send important messages to your building automation system or alarm system.

Editor's note:

Please note that the 12V DC connections are limited to 0.25A. The 12V DC connections of the monitoring system must not be switched on during installation.

Fig.: This shows the pinout of the two 12V DC relay outputs. Both outputs share the ground connection in the center. Use the included Phoenix connector to connect sirens or strobe lights to the control unit.

Relay cable assignment

All remote monitoring devices are supplied with a green Phoenix connector for the 12VDC relay outputs. Simply connect the alarm siren or strobe light to this connector.

Please check the polarity of the power cable. The diagram below provides detailed information.

Fig.: Each of the two relay outputs of the web-based monitoring device can be individually named and configured.

For the strobe light, please select "Pulse".

Test relay outputs

After connecting the alarm siren with integrated strobe light to one of the two 12V relay contacts, simply log in to the web-based monitoring device via your web browser. In the German-language web interface, under "System Tree," you will see the two alarm relays listed under "Power 12V 0.25A."

To test the connected signal light or siren, please select "Initial State: On" from the menu. The connected siren with integrated strobe light will then activate the audiovisual alarm.

n our example "Audiovisual Temperature Alarm Logistics Hannover," we have configured the connected
siren with flashing light to activate immediately as soon as the temperature sensor detects a critical temperature increase.

If the room temperature reaches an alarm state, logistics employees are warned both visually and audibly.

All events (state changes, siren activation) are stored in the system log, including date and time.

Define rules and automatic actions

Each web-based monitoring device can send individual alerts via SNMP, email, and SMS (via GSM or LTE modem or email-to-SMS gateway).

Audible, visual, and audiovisual alarms can be triggered via relay circuitry. Simply navigate to the "Logical Scheme" section in your monitoring device's web interface and click the "+" icon. Here you can easily create custom notifications, alerts, and actions.

Alarm Siren with Strobe Light

Alarm Siren with Strobe Light
The Didactum alarm siren connects directly to the monitoring system and can be controlled via a 12V DC, 0.25A electronic relay output from Didactum monitoring systems. Upon an alarm event—triggered by sensors such as water, smoke, temperature, or access control sensors—the siren emits a loud acoustic alarm and a striking light signal.

Failures like fire, water damage, temperature rise, intrusion, or power outage can have serious consequences. Integration of an alarm siren into the server room alarm system enables immediate acoustic and visual warning during incidents, allowing IT managers and security personnel to respond quickly and effectively.

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