The KM691 KELOX connection unit is the central connection unit of an individual room control for surface temperature control of heating systems. With minimal effort, the KM691 KELOX connection unit can be wired together with all system components, such as room thermostats and actuators. The system components are supplied directly via the power supply of the KM691 KELOX connection unit. All switch commands of the room thermostats are forwarded directly via the KM691 KELOX connection unit to the connected components. This high-quality KM691 KELOX connection unit is available with 6 zones in 230 V. In order to satisfy the desired requirements, four versions are available to choose from. In the full equipment, the KM691 KELOX connection unit has comprehensive functions for energy efficient and system-friendly comfort mode.