Used in underfloor heating/cooling systems, designed to interconnect room thermostats with thermoelectric heads (actuators). All commands from the thermostats are transmitted directly to the thermoelectric heads (actuators) via this unit. Includes connection for pump and boiler control. The unit can be mounted on a rail in the distribution box. Operating voltage: 230 V / 50 Hz (requires cable and plug). Standby power consumption: 1 W. Maximum power consumption: 50 VA. Standard fuse: T 4A H. Max. no. of thermostats: 6. Max. no. of thermoelectric heads: 15. Maximum power for all thermoelectric heads: 24 W. Boiler circuit: SPST (single-pole) switch contact. Pump circuit: SPST (single-pole) switch contact / direct connection L”/N”. Pump and boiler control: switching capacity: 2 A, 200 VA inductive; switching element: relay; start delay: 2 minutes; stop delay: 2 minutes, plus 0–15 minutes, adjustable via micro-switches (DIP switch). Pump anti-blocking protection: 14 days / 1 minute. Ambient temperature: 0–50°C. Storage temperature: -20–50°C. Ambient humidity: 80%, non-condensing. Connection cables: solid: NYM-J/NYM-O (max 5 x 1.5 mm²); flexible: H03V2V2H2-F / H05V2V2H2-F. Standards: EN 60730-1, EN 60730-2-9. Protection class: II. Protection rating: IP20. Weight: 410 g. Dimensions: .