• KNX bus communications (S-mode and LTE mode)
• Backlit display
• 2P / PI / P control
• Outputs for on/off or 3-position control
• Outputs for 3-speed or 1-speed fan
• 2 multifunctional inputs for keycard contact, external sensor, etc.
• Operating modes: Comfort, Economy and Protection
• Automatic or manual fan speed control
• Automatic or manual heating/cooling changeover

• Minimum and maximum limitation of room temperature setpoint
• Control depending on the room or the return air temperature
• Adjustable commissioning and control parameters
• Commissioning with Synco ACS, ETS or via local HMI
• Integration into Synco
• Integration into Desigo via group addressing (ETS) or via individual addressing
• Integration into third-party system via group addressing (ETS)
• AC 230 V operating voltage
• User and parameter settings can be retained or restored with power loss

Room temperature control (heating or cooling) in individual rooms and zones by means of:

• 2-pipe fan coil units
• 2-pipe fan coil units with electric heater
• 4-pipe fan coil units
• Compressors in DX-type equipment
• Compressors in DX-type equipment with electric heater

The thermostats control:

• One 1-speed or 3-speed fan
• One or two on/off valve actuators
• One on/off valve actuator and one 1-stage electric heater
• One 3-position valve actuator
• One 1-stage compressor in DX-type equipment, or one 1-stage compressor with electric heater

Used in systems with:

• Heating or cooling mode
• Automatic heating/cooling changeover
• Manual heating/cooling changeover
• Heating and cooling mode (e.g. 4-pipe system)

RDF600KN/S only:

• Four buttons to control KNX actuators via KNX S-mode. (“Switching groups” with functions such as switching, dimming, blinds control, 8-bit scene).

The room thermostats are delivered with a fixed set of applications. The relevant application is selected and activated during commissioning using one of the following tools:

• Synco ACS
• ETS
• Local DIP switch and HMI
• Room temperature control via built-in temperature sensor or external room temperature / return air temperature sensor.
• Changeover between heating and cooling mode (automatically via local sensor or bus, or manually).
• Selection of applications via DIP switches or commissioning tool.
• Selection of operating mode via operating mode button on the thermostat.
• Temporary Comfort mode extension.
• 1-speed or 3-speed fan control (automatically or manually).
• Display of current room temperature or setpoint in °C and/or °F.
• Minimum and maximum limitation of room temperature setpoint.
• Button lock (automatically and manually).
• 2 multifunctional inputs, freely selectable for:
  – Sensor for automatic heating/cooling changeover
  – External room temperature or return air temperature sensor
  – Dew point sensor
  – Electric heater enable
  – Fault input
  – Monitor input for temperature sensor or switch state
  – Window contact
  – Presence detector (standard presence and hotel presence)
• Advanced fan control function, e.g. fan kick, fan start, selectable fan operation (enable, disable or depending on heating or cooling mode).
• Purge function together with 2-port valve in a 2-pipe changeover system.
• Reminder to clean fan filters (adjust with P62).
• Floor heating temperature limitation.
• Reload factory settings for commissioning and control parameters.
• KNX bus (terminals CE+ and CE-) for communication with Synco or KNX compatible devices.
• Display of outdoor temperature or time of day via KNX bus.
• Time scheduling and central control of setpoints via KNX bus.
• With a Synco RMx7xx controller, the energy demand signal of the thermostat is used to optimize energy supply.