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EU declaration conformity
Temperature and Humidity Controller | Duct | PoM
Product description
DCTHM-2 is a controller for monitoring and regulating temperature and relative humidity in air ducts. The dew point is calculated based on both readings.
The controller generates one output that can directly control an EC fan, an AC fan speed controller, or a damper actuator. Modbus RTU communication and a 24 VDC power supply are connected by Power over Modbus (PoM) via one RJ45 connector. All measured values and settings are accessible via Modbus RTU communication.
The enclosure is made of premium plastic and provides an IP54 protection. The duct probe has an IP20 protection rating.
Additional specifications and description
Which parameters are measured and why is it important?
This controller measures and regulates temperature and relative humidity in air ducts. The dew point is calculated based on these measurements.
Temperature and relative humidity (RH) play a major role in human comfort and the sense of well-being. These parameters are continuously influencing each other. Monitoring and balancing both temperature and relative humidity (and/or dew point) is therefore essential for maintaining stable indoor conditions, preventing condensation, and improving overall comfort and health. Most Sentera sensors and controllers measure both temperature and relative humidity for complete climate control.
What are the configuration and customisation options?
This controller requires little configuration and can be used almost immediately once it has been installed. Temperature and relative humidity can vary depending on the region and season, these parameters are set to the correct values during installation. The other default settings are typically suitable for most applications, however, they can also be adjusted, if necessary. The Modbus register map provides a complete overview of all adjustable settings.
The algorithm controls one output — based on measured values — that can directly control an EC fan, an AC fan speed controller, or a damper actuator. The output value changes in direct proportion to the measured temperature or relative humidity.
Modbus RTU communication is used to transmit the measured values and can be used to change all of the settings.
How is the controller installed, and what are the power and connectivity requirements?
The sensor is designed for installation in rectangular or circular air ducts. The black mounting flange simplifies installation onto circular ducts. For optimal performance, place the sensor in a straight section of the duct. Avoid installing near filters, fans, cooling coils, or other sources of turbulent airflow. Make sure the sensor is positioned correctly according to the airflow direction. For more information, please refer to the mounting instructions.
This controller can be connected with just one RJ45 connector. Power over Modbus (PoM) connects Modbus RTU communication and a 24 VDC power supply via one single UTP-cable. All measured values are available via Modbus RTU communication. To make wiring easier, we recommend using a Sentera 24 VDC power supply with an RJ45 connector. A 24 VDC supply voltage increases the safety and reliability of your installation, by offering protection against short circuit, overload and overvoltage.
What are the manufacturing quality and protection ratings?
All controllers are designed and manufactured in Europe. Each device is calibrated and tested in our factory. Only high-quality components are used, ensuring long-term stability and accuracy.
The enclosure is produced in-house by Sentera Plastics from premium ASA, providing exceptional strength and durability. The enclosure offers an IP54 protection against ingress of dust and moisture. The sensor element is housed within the duct probe, which has an IP20 protection rating. The probe includes an opening that allows airflow to come into direct contact with the sensor element.
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