Monitoring System 500T - Remote Site Monitoring Bundle

Remote Site Monitoring: Autonomous Monitoring of Remote Locations via LTE

This Didactum bundle combines the Monitoring System 500T with five core environmental sensors — temperature, humidity, water, smoke, and AC voltage — as well as an LTE modem with an additional antenna to create a fully autonomous remote monitoring solution. This makes it possible to reliably monitor branches, retail outlets, radio masts, distribution stations, or other unmanned locations, even when no stable internet connection is available there.

As a highly advanced 19"-1U control unit, the Monitoring System 500T forms the central monitoring hub of the bundle: it is integrated into the network via Gigabit Ethernet, is fully configurable through the web browser, and requires no additional software. The temperature, humidity, water, smoke, and AC voltage sensors are connected directly to the analog ports and are automatically detected. The LTE modem installed in the expansion slot of the 500T ensures that alarm messages are reliably transmitted via mobile network even if the local network connection fails — ideal for remote sites without fixed data connectivity.

As your requirements grow, this bundle grows with them: additional sensors and CAN devices can be added at any time via the remaining analog ports and the 500T CAN bus — without replacing the central unit.

This bundle includes:

Seven perfectly matched Didactum products that together form complete remote site monitoring with cellular backup.

Monitoring System 500T

The Monitoring System 500T is the central control unit of the bundle and a highly advanced, field-proven 19"-1U monitoring solution for data centers, technical rooms, and other business-critical environments. As a self-sufficient device without moving parts such as fans or hard drives, it continuously records all connected sensors and issues real-time alerts long before a costly outage can occur. With 8 analog ports, one CAN bus port, 16 dry contact inputs, and 4 relay outputs, the 500T can also be used as an I/O controller for doors, fans, generators, or UPS systems. The system is equipped with Gigabit Ethernet (10/100/1000 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 equipment cabinet or server room of the monitored site. The sensor is connected via an RJ11 plug to one of the 500T analog ports 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 triggered automatically when the temperature becomes critical.

Humidity Sensor

The Didactum humidity sensor measures the relative humidity at the remote site and provides early warning of excessively dry air (ESD risk for hardware) or excessive humidity (risk of condensation). Like the temperature sensor, it is connected to an analog port of the 500T via an RJ11/RJ12 cable, automatically detected, and configured in the web interface with individual threshold values.

Water Sensor

The Didactum water sensor detects leaks by measuring the increase in capacitance between two metal poles — corrosion-resistant and ideal for long-term use under raised floors, at air-conditioning systems, or in unmanned equipment cabinets. The sensor is connected via an analog port of the 500T and typically reports water ingress within about 15 seconds.

Smoke Sensor

The Didactum smoke sensor is a photoelectric smoke detector for early fire detection at unmanned sites. It is connected to an analog port of the 500T, mounted on the ceiling (max. 6 m installation height), and can optionally be daisy-chained with up to 10 additional smoke sensors to cover larger spaces.

AC Voltage Sensor

The Didactum AC voltage sensor monitors the power supply at the remote site in real time and immediately reports power failures, undervoltage, or overvoltage. It is simply plugged into a free 230V outlet and connected to an analog port of the 500T via a sensor cable. Thanks to plug & play and auto-sensing, the sensor is automatically detected.

LTE Modem with Additional Antenna

The LTE modem is already factory-installed in the designated expansion slot of the Monitoring System 500T and is therefore the heart of the remote site concept: if the local network connection fails, the modem automatically switches to LTE (4G) and keeps the system connected, so that alarms from the temperature, humidity, water, smoke, and AC voltage sensors are still reliably transmitted even when no fixed network is available at the site. In addition, the module supports sending and receiving SMS notifications to up to ten different phone numbers, which significantly improves response speed for critical alerts.

Comprehensive sensor integration for the bundle

The Monitoring System 500T supports up to 130 sensors, contacts, and relays simultaneously — 8 analog RJ12 sensor ports are available directly on the device, and this number can be significantly expanded via the CAN bus. Five of the eight analog ports are already occupied in the bundle by temperature, humidity, water, smoke, and AC voltage sensors, while the remaining three ports stay free for additional sensors.

Thanks to the three remaining analog ports and the CAN bus port, the bundle can be expanded at any time with additional sensors — for example extra door contacts, vibration sensors, or magnetic contact sensors to protect outdoor cabinets.

Real-time monitoring and automated alerting

The Monitoring System 500T reacts immediately to every change in the state of the connected sensors. When a threshold is exceeded, the system automatically sends email notifications, SMS, web-to-SMS, push messages, or SNMP traps, or activates a siren. If the local network connection fails, the factory-installed LTE modem automatically takes over communication and ensures that alarms and SMS notifications continue to be delivered reliably. 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, Modbus TCP/IP).

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.

• Power failure detected → SMS to technician, SNMP trap to control center
• Temperature > 28 °C AND humidity < 30 % → send email, switch relay
• Water sensor triggered → activate siren, SMS to technician
• Network failure detected → automatic switch to LTE, SMS confirmation

The Monitoring System 500T can be used as an I/O controller for air conditioning systems, generators, lighting, doors, or fans — ideal for remote monitoring and control of remote sites.

Full control

Monitor all sensors, turn them into actionable alerts, and configure integrations — all through an intuitive, web-based interface.

• Monitor the real-time status of temperature, humidity, water, smoke, and power supply together
• Create automated actions based on defined conditions
• Send email, Telegram, HTTP request, SNMP, or other notifications
• Visualize trends and logs for better decision-making
• Manage users, permissions, and access securely

Scalable, reliable, and future-proof

The Monitoring System 500T in the bundle is equipped with 10/100/1000 Mbit/s Ethernet (Gigabit). The system supports up to 1000 elements (sensors, contacts, triggers, timers, logic schemes, notifications). Five of the 8 analog ports of the central unit are already occupied in the bundle with sensors, while the remaining 3 ports and the CAN bus port remain fully available for additional sensors. Regular firmware updates ensure long-term usability. Made in the EU — German support included.

Connect CAN devices

The Monitoring System 500T has a CAN bus port to which up to 32 additional CAN devices can be connected — for example additional sensor expansion units (8 analog ports per unit) or dry contact expansions for dry contacts. The total length of the CAN bus line can be up to 225 m, allowing larger infrastructures to be monitored centrally. An additional CAN power supply (12V/1A) is only required if 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 — with no additional software required.

1. Mount the Monitoring System 500T in the 19" rack or equipment cabinet and connect it to your network via Gigabit Ethernet cable, if available
2. Connect the appropriate power supply — the system starts automatically
3. In the browser, open the device’s default IP address specified in the quick guide and run through the setup wizard
4. Connect the temperature, humidity, water, and smoke sensors to an analog port each — automatic detection
5. Plug the AC voltage sensor into a free outlet that is not UPS-backed and connect it to the 500T via the sensor cable
6. Insert your own SIM card into the already factory-installed LTE modem and activate it in the web interface
7. Name each sensor in the web interface, define thresholds, and configure alarm rules

What is included in the package

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

• Didactum 500T monitoring unit1 piece
• OTG USB-C cable1 piece
• UTP Ethernet cable, 3 m1 piece
• Micro USB-C OTG adapter cable1 piece
• 19" rack brackets2 pieces
• M3 × 8 mm Phillips flat-head screws6 pieces
• Connection terminal, 6-pin, 5.08 mm1 piece
• Connection terminal, 3-pin, 3.81 mm1 piece
• Connection terminal, 6-pin, 3.5 mm4 pieces
• Connector, 2-pin, 3.81 mm15 pieces
• Self-adhesive rubber feet4 pieces
• Quick guide1 piece
• Temperature sensor incl. 2 m RJ11 cable & mounting material1 piece
• Humidity sensor incl. 2 m connection cable & mounting material1 piece
• Water sensor incl. connection cable & mounting bracket1 piece
• Smoke sensor incl. connection cable & ceiling mounting1 piece
• AC voltage sensor incl. connection cable1 piece
• LTE modem with additional antenna1 piece

A SIM card for the LTE modem is not included and must be purchased separately.

Why this bundle is the right choice

Practical application examples

• Remote monitoring of branches and outposts without fixed internet access
• Monitoring of radio masts, distribution stations, and telecommunications sites
• Autonomous equipment cabinet monitoring at unmanned locations
• Early detection of overheating, condensation, water ingress, smoke, and power failure
• Backup communication for critical networks in hospitals, public authorities, or industrial companies
• Audit-proof event logging for audits and compliance across multiple sites

This bundle of Monitoring System 500T, five environmental sensors, and LTE modem combines central site monitoring with fail-safe cellular backup communication — for reliable remote site monitoring that also alarms reliably by SMS without a fixed network.

More about the bundle

Frequently Asked Questions