Product Information

  • Temperature controller and VOC (volatile organic compounds) sensor for KNX bus
  • Temperature control: PI controller (continuous), 2-step controller % , 2-step switching, PWM
  • Preset temperature curves for different heating/cooling systems
  • Additional heating/cooling stage can be activated
  • Various prioritised operating modes (Comfort, Standby, Eco, frost/heat protection)
  • Extension of the duration for the comfort temperature via button (green indicator)
  • Setpoint limitation (temperature) via outdoor temperature possible
  • Dew point determination
  • Feedback as bit, byte or RHCC format
  • Indicator heating /cooling (red/blue)
  • Air quality control: PI controller (continuous), 2-step controller % , 2-step switching
  • Air quality Measuring method VOC, output VOC or CO2
  • Regulation or stage mode
  • Air humidity control: PI controller (continuous), 2-step controller % , 2-step switching
  • Adjustment of control values via rotary knob or object
  • Output of temperature (°C), air quality (ppm) and relative humidity (%) to the bus
  • Indicator (traffic light) for air quality and humidity (green, yellow, red)
  • Four limit values each for air humidity and quality
  • Suitable for switch ranges 55x55
  • Adapter for switch ranges 64x64 included
  • With integrated bus coupler
55 x 55 x 26 mm
typ. power input:
12 mA
Degree / class of protection:
IP20 / Class III
Ambient temperature:
-5 °C to +45 °C
Display elements:
1 x Programming LED, red
2 x Traffic light LED, red/yellow/green
1 x LED, red/blue
1 x LED, green
Manual operation:
Programming button, push button for comfort function, Potentiometer for setpoint
KNX TP 256:
Connections and wires:
Bus line: EIB/KNX bus terminal (black/red)
Description Colour Part number EAN number
WS-VOC-HVAC-KNX white 93806 4007529938063
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