The wireless programmable room thermostat Siemens RDL211RF.ST is a transmitter-receiver set designed for controlling heating and cooling in households and light commercial applications. The thermostat communicates with the switching unit via radio (433 MHz) and offers intuitive control through an E-ink display and touch buttons.

The regulation can be set as 2-point, TPI, or 3-point (2-/3-position output). Available modes include COMFORT, SETBACK, AUTO, and PROTECTIVE, along with functions such as Absence, start/stop optimization, and frost protection. Thanks to two inputs, it is possible to connect, for example, an external sensor (room/radiant surface) or use digital signals like window contact, setback, or heating/cooling switch.

Main Features

• Wireless design – thermostat + switching unit set (transmitter/receiver)
• Weekly time program and COMFORT / SETBACK / AUTO / PROTECTIVE modes
• Configurable algorithm: 2-point, TPI, or 3-point (2-/3-position output)
• 2× voltage-free relay output – changeover contact
• Multifunctional inputs: external sensor, window contact, setback, heating/cooling switch, condensation detector
• Regulation optimization, control locking, valve/pump exercise
• Configuration locally or via the Siemens QuickConfig app

Technical Specifications