Belimo room control module for CO₂, humidity and temperature - ePaper touch display - MP-Bus - P-22RTM-1800D-1

Belimo Room Control Module for CO₂, Humidity and Temperature - ePaper Touch Display - MP-Bus - P-22RTM-1800D-1

The Belimo P-22RTM-1800D-1 is a room control module (RAL 9003) designed for simultaneous measurement of CO₂, relative humidity and temperature in occupied spaces, featuring an integrated ePaper touch display for direct readout and control. The high-contrast display (69 x 62 mm) reflects ambient light like paper, ensuring excellent readability under all lighting conditions, and is operated via touch-sensitive fields. Thanks to MP-Bus communication and three configurable analogue outputs, the module integrates seamlessly with existing controllers from other manufacturers. The CO₂ measurement utilises dual-channel NDIR technology, eliminating the need for regular calibration with outdoor air. Commissioning and configuration are straightforward via the Belimo Assistant 2 application.

Advantages and Features

• ePaper Touch Display: The built-in high-contrast display shows real-time measured values and system status directly on the wall, allowing users to set the desired temperature and fan speed via touch fields.
• Triple Measurement in One Module: The room control module simultaneously measures CO₂ (0-2000 ppm), relative humidity (0-100% RH) and temperature (0-50°C), reducing wiring and installation costs compared to separate sensors.
• NDIR Dual-Channel CO₂ Technology: An integrated reference channel automatically corrects the measurement drift common to all CO₂ sensors over time, removing the need for regular calibration with outdoor air, even in continuous 24/7 occupancy.
• MP-Bus Communication: Up to 8 modules can be connected to a single MP-Bus, with both power supply and communication over the same cable, significantly lowering wiring expenses.
• CO₂ Traffic Light Function: The built-in LED visually indicates air quality in green, yellow and red, giving occupants immediate insight into the ventilation requirements of the space.
• Three Configurable Analogue Outputs: Outputs can be set to 0-10 V, 2-10 V, 0-5 V or 4-20 mA, ensuring compatibility with virtually all existing controllers.
• Easy Wall Mounting: Mountable on a standard flush-mounted box with cable entry from the rear, top or bottom, allowing wiring to be concealed or surface-mounted as needed.

Installation, Maintenance and Applications

The module is mounted on the wall using the supplied screws, ideally positioned in a representative location within the room, away from direct sunlight, drafts and heat sources. Electrical connection is made via spring terminals suitable for cables from 0.2 to 2.5 mm². Configuration of measurement ranges, analogue outputs, display content and the CO₂ traffic light function is performed with the Belimo Assistant 2 app. It is recommended to recalibrate the CO₂ sensor after five years of use. This room control module is especially suitable for ventilation applications in offices, meeting rooms, classrooms, hotel rooms and healthcare facilities where air quality, humidity control and user operation are essential.