MDT SCN-RTN55S.01 Room Temperature Extension Unit Smart 55 Pure White Glossy

The MDT SCN-RTN55S.01 Room Temperature Extension Unit brings precise climate monitoring and control to KNX installations, with a discreet Smart 55 design that blends into any modern interior. Unlike basic temperature sensors, this unit also measures humidity and calculates dew point, giving your building automation system a complete picture of the indoor environment.

Highlights

• Measures temperature from 0 to +50 °C and relative humidity from 0 to 100 %
• Calculates dew point for condensation monitoring
• Backlit LCD shows temperature, humidity, operating mode, and setpoint
• Four tactile buttons for setpoint adjustment and mode selection
• Supports heating/cooling control and 3-stage fan control
• Flush-mounted in standard 55 mm switch frames from major manufacturers

In daily use

Installed in a living room, office, or hallway, the SCN-RTN55S.01 acts as a room sensor and operating unit. Users can switch between comfort, standby, night, and frost protection modes directly on the device. The clear display keeps current values and settings visible at a glance, while the KNX bus powers the unit—no extra wiring needed.

Full specifications

• Product type: Room Temperature Extension Unit
• System protocol: KNX
• Design line: Smart 55
• Colour: Pure White Glossy
• Temperature measurement range: 0 to +50 °C
• Humidity measurement range: 0 to 100 % RH
• Functions: Temperature measurement, humidity measurement, dew point calculation
• Control functions: Heating/cooling control, fan control (3 stages)
• Operating modes: Comfort, Standby, Night, Frost protection
• User interface: 4 tactile buttons
• Display: Backlit LCD
• Mounting: Flush-mounted, fits standard 55 mm switch ranges
• Power supply: KNX bus voltage (21–30 V DC)
• Current consumption: Max. 5 mA
• Protection class: IP20
• Material: Plastic
• Compatibility: 55 mm switch frames from Gira, Berker, Jung, Merten, and others

Final note

The SCN-RTN55S.01 is a versatile room sensor for KNX systems, offering temperature, humidity, and dew point data with local control in a compact, glossy white design.