Fan Coil Thermostat (FCT)

Controller and Control Unit in one

Room control unit with Modbus RTU

The control units / controllers from the FCT series are designed for the operation and control of fan coil units. Thanks to the built-in temperature sensor and internal relays, the device is ideally suited for use at the room level. In this way, no further external relays have to be installed to control the fan or a heating and / or cooling valve. The FCT is integrated into the DEOS control system via the Modbus RTU interface. The devices are installed in a standard installation socket.

With their modern design, the FCT's fit perfectly into your individual building environment. The devices have an LCD display and illuminated function keys for control purposes, e.g. set-point adjustment or fan stage control. The digital user interface also enables intuitive operation, for example via a smartphone / tablet, and blends seamlessly into the innovative overall graphic concept.

Advantages at a glance


  • Cost-effective/ high performance room control unit with internal control
  • Compatible with 2-pipe or 4-pipe systems
  • Flexible temperature control via the device (decentralised), via the HTML5 web server integrated in the OPEN EMS controller or centrally via OPENweb (BMS)
  • Intuitive operation through user-friendly, state-of-the-art operating graphics
  • Global functions such as calendar, room occupancy and weather data are managed centrally and reduce energy consumption
  • Internal logic also allows autonomous use
  • Quick and easy commissioning via ready-made macros and graphics
  • Internal relays allow quick and easy replacement in case of failure
  • Mass parameterisation via DEOS programming tools reduces costs

Technical Information & Variants

Power supply: 230V AC
Communication: Modbus RTU (4800-115200 bps)
Features: LCD display, touch operation, internal relays, universally applicable for 2-pipe or 4-pipe systems

Colour Valve outputs Fan stages
DS-FCT B 2/4P On/Off Black
2x relay outputs
(open/closed, 230VAC, 3A)
3x relay outputs
(230VAC, 5A)
DS-FCT W 2/4P On/Off White 2x relay outputs
(open/closed, 230VAC, 3A)
3x relay outputs
(230VAC, 5A)
DS-FCT B 2/4P 0-10V Black 2x relay outputs
(continuous, 0-10V)
3x relay outputs
(230VAC, 5A)
DS-FCT W 2/4P 0-10V White 2x relay outputs
(continuous, 0-10V)
3x relay outputs
(230VAC, 5A)

Additional Technical Information

Technical data sheets and additional technical information on our products are available to our partners and customers in the DEOS Partner Section.

Partner Section