Didactum 50T - Alarm Bundle

Bundle Alarm: Compact monitoring with immediate audible and visual alarm notification

This Didactum bundle combines the compact Monitoring System 50T with a temperature sensor, a door contact sensor, and an alarm siren with flashing light to create an immediately ready-to-use monitoring solution with direct on-site alarm notification. This detects both overheating and unauthorized access and signals them immediately in an emergency both audibly and visually — ideal for server rooms, technical cabinets, and smaller utility rooms without constant on-site personnel.

As a compact desktop control unit, the Monitoring System 50T forms the foundation of the bundle: it is connected to the network via Ethernet, can be configured entirely through the web browser, and requires no additional software. The temperature and door contact sensor are connected directly to the analog ports and are automatically detected thanks to AutoSense, while the alarm siren with flashing light is connected to one of the 50T relay outputs and warns immediately on site when an alarm event occurs.

As your requirements grow, this bundle grows with them: additional sensors can be added at any time via the remaining analog ports and the CAN bus of the 50T — without replacing the central unit.

This bundle includes:

Four coordinated Didactum products that together form a compact monitoring and alarm solution with direct on-site warning.

Didactum Monitoring System 50T

The Didactum Monitoring System 50T is the central control unit of the bundle and a compact, cost-efficient monitoring solution for server rooms, IT racks, and technical systems. As a standalone desktop unit, it continuously records all connected sensors and reports anomalies in real time, long before they become an expensive failure or an unnoticed intrusion. With 4 analog ports, one CAN bus port, 2 potential-free inputs, and 2 relay outputs (12V / 0.25A), the 50T can also be used as an I/O controller for sirens, fans, or lighting. The system is equipped with Ethernet (100 Mbit/s) and can be seamlessly integrated into monitoring environments such as Zabbix, PRTG, or Nagios thanks to SNMP, Modbus TCP/IP, and Syslog.

Temperature sensor

The Didactum temperature sensor is used for precise temperature monitoring and measurement in the technical cabinet or server room. The sensor is connected to an analog port of the 50T via an RJ11 plug and is automatically detected. It can then be freely named in the web interface and assigned custom threshold values (Lower Critical, Lower Warning, Normal, Upper Warning, Upper Critical), so that an alarm is automatically triggered when a critical temperature is reached.

Door contact sensor

The Didactum door contact sensor monitors the opening or closing status of doors, windows, and server cabinets. It consists of a magnet and a sensor unit and is connected to a free analog port of the 50T. Multiple door contact sensors can be connected in series (up to 10 units, max. 150 m total length), allowing several access points to be monitored centrally. In the event of unauthorized access, the 50T can automatically trigger the alarm siren with flashing light and additionally send notifications.

Alarm siren with flashing light

The Didactum alarm siren with flashing light provides immediate audible and visual warning directly at the location of use. It is connected via the included connection cable to one of the 12V DC relay outputs (0.25A) of the 50T and can be flexibly linked with any sensor in the bundle: if the temperature sensor reports critical overheating or the door contact sensor reports unauthorized access, the 50T automatically activates the siren — with a loud audible alarm (108 dB) and red flashing light (2.5 Hz).

Comprehensive sensor integration for the bundle

The Monitoring System 50T supports up to 100 sensors, contacts, and relays simultaneously — 4 analog ports and 2 relay outputs are available directly on the device, and this number can be expanded via the CAN bus. In the bundle, 2 of the 4 analog ports are already occupied by the temperature and door contact sensor, and 1 of the 2 relay outputs is used by the alarm siren. The remaining 2 analog ports and the second relay output remain available for additional sensors and alarm devices.

Thanks to the two remaining analog ports, the second relay output, and the CAN bus port, the bundle can be expanded at any time with additional sensors or alarm devices.

Real-time monitoring and automated alarm notification

The Monitoring System 50T reacts immediately to any change in the status of the connected sensors. If a threshold is exceeded, the system automatically sends email notifications, SMS, or SNMP traps and additionally activates the connected alarm siren with flashing light, so that on-site personnel are warned immediately — even outside business hours or without constant monitoring of the web interface. Integration into monitoring software such as Zabbix, PRTG, or Nagios is easily possible thanks to common network protocols (HTTP, HTTPS, SMTP, FTP, SNMP, Syslog, DHCP).

Web-based control & intelligent automation

The intuitive web interface allows easy management of all sensors as well as alarms and scenarios — directly from the moment the bundle is put into operation.

• Door opening detected → trigger alarm siren, send SMS to administrator
• Temperature > 30 °C → trigger alarm siren, email notification
• Temperature > 28 °C AND door contact open → switch relay, send SNMP trap
• Sensor value returns to normal → automatic alarm acknowledgement, deactivate siren

The Monitoring System 50T can also be used as an I/O controller for additional alarm devices, fans, or lighting — ideal for compact monitoring solutions without constant on-site personnel.

Full control

Manage temperature, access, and alarm siren together, turn them into actionable alarms, and configure integrations — all through an intuitive web-based interface.

• Monitor real-time status of temperature and door contact together
• Control the alarm siren manually or automatically via alarm rules
• Create automated actions based on defined conditions
• Send email, Telegram, HTTP request, SNMP, or other notifications
• Visualize trends and logs for better decisions
• Manage users, permissions, and access securely

Scalable, reliable, and future-proof

The Monitoring System 50T in the bundle is equipped with 100 Mbit/s Ethernet. The system supports up to 700 elements (sensors, contacts, triggers, timers, logic schemes, notifications). Two of the 4 analog ports and one of the 2 relay outputs of the central unit are already occupied in the bundle, while the remaining 2 analog ports, the second relay output, and the CAN bus port remain fully available. Using CAN expansion units and daisy chaining, the number of sensors can be expanded to over 256 if needed. Regular firmware updates ensure long-term use. Made in the EU — German support included.

Connect CAN devices

The Monitoring System 50T has a CAN bus port that allows up to 10 additional CAN devices to be connected in a chain — for example additional sensor expansion units (8 analog ports per unit) or dry-contact expansion units for potential-free contacts. With daisy chaining, a total cable length of up to 320 m can be achieved, so that even larger environments can be monitored centrally. An additional CAN power supply (12V/1A) is only required when the number of CAN devices in the chain exceeds 12 units.

Commissioning in just a few minutes

Setting up the bundle is quick and easy — without any additional software.

1. Connect the Didactum 50T to your network via Ethernet cable
2. Connect the included 12V DC power supply — the system starts automatically
3. Open the device’s default IP address in the browser (192.168.0.193, alternatively .101 or .62) and go through the setup wizard
4. Connect the temperature and door contact sensor to an analog port each — automatic detection (AutoSense)
5. Connect the alarm siren with flashing light to a free relay output of the 50T
6. Name the sensors in the web interface, set threshold values, and link the siren with the desired alarm rules
7. Optional: centrally manage advanced settings and alarm rules

What is included in the package

Please check the contents for completeness upon receipt and report any missing or damaged items to your supplier immediately.

• Monitoring unit Didactum 50T1 pc
• Plug-in power supply 12V / 1A (5.5 × 2.1 mm)1 pc
• RJ-45 Ethernet cable, 2 m, white1 pc
• OTG USB-C cable1 pc
• Connection terminal, 3-pin, 3.5 mm1 pc
• Connection terminal, 3-pin, 3.81 mm1 pc
• Self-adhesive rubber feet4 pcs
• Quick start guide1 pc
• Warranty card1 pc
• Temperature sensor incl. 2 m RJ11 cable & mounting material1 pc
• Door contact sensor incl. connection cable & mounting material1 pc
• Alarm siren with flashing light1 pc

Why this bundle is the right choice

Practical application examples

• Server room and technical cabinet monitoring with immediate on-site alarm notification
• Access control for server cabinets, archives, and sensitive business areas
• Overheating protection with audible and visual warning when thresholds are exceeded
• Compact alarm solution for warehouses, technical rooms, or smaller production areas
• Addition to existing monitoring environments (Zabbix, PRTG, Nagios)
• Traceable event logging for audits and compliance

This bundle of Didactum 50T, temperature sensor, door contact sensor, and alarm siren with flashing light offers an immediately deployable, compact monitoring solution with direct audible and visual on-site alarm notification — ideal for companies that need to react quickly, even when no one is constantly watching the web interface.

More about the bundle

Frequently asked questions