EU declaration conformity
CO2 controller | wall mounting | LED indicators | 24 V DC-PoM
Product description
Single-output temperature, humidity, and CO2 controller. The supply voltage is 24 V DC. Temperature, relative humidity, CO2 (carbon dioxide), and ambient light are all measured. This controller controls ventilation systems and regulates fan speed in commercial and residential settings. Based on the measured values, the sensor algorithm controls the single analogue output. This single output can control an EC fan, an AC fan speed controller, or a damper actuator directly.
The following output types are available: 0-10 VDC / 0-20 mA / 0-100% PWM. Modbus RTU provides access to all measurements and the output value. The power supply can be connected either through the terminal blocks or through the RJ45 connector.
The CO2 sensor element can be replaced if necessary. The ambient light sensor can be used in many applications to control the ventilation system based on the occupancy of the room. Modbus RTU can be used to change all of the settings. The light intensity of the LEDs used for status indication can also be adjusted.
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Additional specifications and description
People produce CO2 or carbon dioxide while breathing. That makes CO2 concentration a good indicator for the occupancy and activity level in a space. In many applications, CO2 sensors are used as an indicator for the ventilation requirements. This HVAC transmitter offers a clear, visual indication of the CO2 level via the green, yellow and red LED. The green LED indicates that the CO2 level is within range - there is sufficient fresh air supply. When the CO2 level enters the alert range, the yellow LED lights up. Red means that CO2 levels are too high or that there is insufficient fresh air supply. The measured temperature, relative humidity, CO2 and ambient light level are available via Modbus RTU. Photoacoustic sensing technology is used here to measure the CO2 level. This makes the sensor very sensitive and specific, making it useful for the detection of various gases. The use of specific infrared wavelengths that correspond to CO2 absorption lines ensures that interference from other gases is minimised.
![CO2 based damper control](/en/files/article/image/description/rcmfh-3/controlling-dampers-based-on-co2.jpg)
The ABC logic self-calibrating algorithm is by default enabled. This algorithm is designed to be used in applications where CO2 concentrations will drop to outside ambient conditions (400 ppm) at least once (15 minutes) in a 7day period, which is typically seen during unoccupied periods. The sensor will reach its operational accuracy after 25 hours of continuous operation at a condition that it was exposed to ambient reference levels of air at 400 ppm ± 10 ppm CO2.
The enclosure offers an IP30 protection against ingress of dust and moisture. It can be mounted on a wall indoors. To ensure optimal performance, it should be protected from direct sunlight.
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