MDT KNX 55 x 55 mm temperature controller with display, pure white glossy, flush-mounted

MDT Smart 55 room temperature controller – Intelligent temperature control with modern color display

The MDT Smart 55 room temperature controller combines state-of-the-art KNX technology with intuitive operation and elegant design. The active color display clearly shows operating states and values, while the integrated temperature and humidity sensor enables precise control of the room climate. With its four flexible binary inputs, the controller can be optimally integrated into any KNX system.

Key features

• Color display for function and status indication
  • Customizable background colors (white/black) and display brightness.
  • Clear display of temperature, humidity and operating conditions.
• Precise temperature control
  • Measuring range: -10 °C to +50 °C.
  • Selectable controller type: 2-point, PI or PWM control .
  • Automatic saving of setpoint values ​​in case of bus voltage failure.
• Integrated humidity sensor
  • Measuring range: 0 to 100% relative humidity.
  • Calculation of the dew point with a warning function in case of deviation from the comfort range.
• Four binary inputs
  • Direct connection of push buttons, switches or window contacts is possible.
  • Flexible use for controlling individual KNX functions.
• Versatile control options
  • Switching of the operating mode (e.g. automatic, manual, frost protection) via KNX bus.
  • Manual or automatic ventilation control .
  • Status feedback and scene control via bit or byte objects.

Technical details

• Measuring ranges
  • Temperature: -10°C to +50°C.
  • Humidity: 0 to 100%.
• Inputs : 4 for potential-free contacts (e.g., window contacts or push buttons).
• Power supply : KNX bus, typical consumption < 0.3 W.
• Protection class : IP20 – suitable for dry indoor areas.
• Dimensions : 55 × 55 mm, installation depth only 12 mm.
• Mounting height : Recommended at 1.6 m.

Applications

• Precise control of heating and ventilation systems.
• Optimal integration into KNX bus systems for smart homes and commercial applications.
• Monitoring and control of room temperature and humidity.

compatibility

• Suitable for 55 mm switch ranges from leading manufacturers:
• GIRA : Standard 55, Esprit, Event.
• BERKER : S1, B3, B7.
• JUNG : A500, AS500, A550.
• MERTEN : M-Smart, M-Plan, M-Pure.

Easy installation and parameterization

Installation is carried out in standard electrical boxes. Parameterization and configuration are conveniently performed via ETS5 . Thanks to the integrated bus coupler, no additional power supply is required.

Product information

Manufacturer part number: SCN-RTR55S.01
Article number: SMH0290

Shipping costs: free shipping within the EU for orders over €149; for orders under €149, we charge €5.90 shipping costs.

Switzerland: flat rate €25.00

Returns: You can cancel your purchase within 14 days of receipt and then return the products to us. Please note that for sustainability reasons and a fair pricing philosophy, we only cover return shipping costs in the case of a defect or warranty claim.

MDT technologies GmbH
Paper mill 1
DE-51766 Engelskirchen
knx@mdt.de