The Didactum Modbus RTU expansion module extends your monitoring system with the ability to seamlessly integrate up to 32 Modbus RTU devices – such as sensors, meters, or controllers. With support for daisy-chain installations up to 1000 m in cable length, it is ideally suited for large-scale and complex infrastructures in server rooms, industrial facilities, and building management systems.

Server Room and Data Center Monitoring

In critical IT environments, the module ensures centralized data acquisition from Modbus-capable sensors such as temperature, humidity, differential pressure sensors, energy meters, or UPS systems. Each connected Modbus sensor is represented in the Didactum system as a virtual sensor. All readings are available for network monitoring systems via the web interface or SNMP.

Individual thresholds and alarm rules enable the detection of conditions such as overheating, high humidity, abnormal power consumption, or UPS malfunctions. The integration of Modbus RTU devices also allows for centralized control of climate systems, ventilation units, or access control systems.

Industrial and Building Management

Beyond IT environments, the module offers advantages in industrial automation – for connecting flow, pressure, or production sensors, as well as energy meters. These can be centrally monitored, controlled, and integrated into existing processes to optimize production efficiency.

In building management (BMS), the Modbus RTU module serves as an interface for HVAC systems, lighting controls, energy consumption monitoring, and other technical systems. This helps improve energy efficiency and operational reliability in the long term.

Remote Monitoring of Critical Infrastructure

The module is ideal for connecting Modbus sensors across long distances, for example in substations, pipelines, or power supply systems. The data from all sensors is reliably collected in real time and displayed in the central monitoring system to enable quick responses to faults.

Easy Installation and Integration

Installation is straightforward: the slot PCB is inserted into the monitoring system without requiring a restart. The internal termination resistor is enabled by default but can be deactivated for long or multi-branch bus installations.

Depending on the system model, the module is equipped with either a 90° angled connector (100T, 500T, 550T) or a straight connector (300T).

Configuration via Web Interface

Setup is conveniently performed through the web interface of the Didactum monitoring system. Here, virtual sensors can be created, named, and assigned thresholds. Graphical display as icons and integration into existing alarm or automation processes are easily achievable.

Application Examples

• Server Room & Data Center: Monitoring of air conditioning systems, UPS, energy consumption, and air parameters.
• Industrial Automation: Process control using flow, pressure, and production sensors.
• Building Management: HVAC control, lighting control, and energy consumption monitoring.
• Energy Management: Integration of solar inverters, battery storage systems, and power meters.
• Remote Monitoring: Ensuring data transmission in critical network and supply systems.

Future-Proof Modbus RTU Integration

The Didactum Modbus RTU expansion module is a scalable, robust, and easy-to-integrate solution for centralized monitoring and control of Modbus devices. Whether in IT infrastructure, industrial automation, or building management, it ensures efficient monitoring, rapid alarm responses, and long-term optimization of your systems.