RDF600KN/S Flush Mount KNX Room Thermostat for 2/4-Pipe FCU 4-Button Light/Blind Switch + 2 Universal Inputs S55770-T400

The RDF600KN/S extends the KNX FCU thermostat by integrating a switching group with four physical push buttons for local lighting and blind control. This hybrid design combines temperature regulation, fan speed, light toggling, and blind operation in one wall unit, eliminating separate KNX button modules per room.

Two universal inputs support keycard contacts, return air sensors, window contacts, presence detectors, and changeover signals. Controls 2-pipe and 4-pipe fan coil units with on/off valve and fan outputs at AC 230 V. Compatible with round and square conduit boxes.

• Protocol: KNX S-Mode (ETS); Voltage: AC 230 V; System: 2/4-pipe FCU
• Outputs: On/off (valve and fan actuator)
• Push Buttons: 4 integrated for lights and blinds; Switching Group: KNX group addresses
• Universal Inputs: 2 (keycard, return air, dewpoint, presence, changeover)
• Digital Inputs: 2 (light/blind integration)
• Modes: Comfort, Economy, Protection; Setpoint: Via KNX bus
• Conduit Box: Round and square compatible; IP30; Warranty: 24 Months

Hotel guest rooms use the RDF600KN/S as a single device managing FCU temperature, fan speed, bedside light toggle, and curtain operation simultaneously. This reduces device count, simplifies wiring, and shortens commissioning per room.

Open-plan offices configure buttons for zone lighting and perimeter blinds alongside centralized FCU control. Universal inputs accept window-contact signals for automatic heating disable when windows open. Ideal where space and budget limit separate KNX devices.