Theben RAMSES 850 Digital Clock Thermostat

£54.26 + VAT

  • Digital clock thermostat for time-dependent monitoring and control of room temperature
  • Power supply via OpenTherm bus
  • Suitable for energy-saving room temperature control in houses, apartments, etc.
  • Operation via app
  • Direct Bluetooth Low Energy (BLE) connection between the app and RAMSES BLE, no communication via the Internet
  • Settings configured conveniently via the app with intuitive operation from a smartphone or tablet
  • Increased user convenience
  • Communication with the heating unit via OpenTherm
  • External input for the flexible connection of the external temperature sensor, floor sensor, motion detector or telephone contact
  • PI room controller, controlled by atmospheric conditions, with or without room influence
  • Preset with three modifiable weekly programs for heating and one for tap water
  • Suitable for modulating gas condensing boiler systems and modulating heating systems with OpenTherm interface
SKU: 8509150 Category: Tags: ,


Setting range temperature 2°C … 30°C
Type of connection 2-way conductor (BUS) room controller
Program Weekly program
Number of memory locations 42
Power reserve 4 hours
Type of protection IP 20
Protection class II according to EN 60 730-1



German manufacturer with of high quality KNX components including actuators, binaries and DALI.


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