KNX RF S1R-B2 compact

Multifunctional Radio Actuator, 2 Binary Inputs

The Radio Actuator KNX RF S1R-B2 compact has got a multifunctional output which can connect to either a drive with Up/Down control (blind, awning, shutter, window) or two switchable devices (On/Off for light and ventilation).Because the output is designed to be free of potential, other systems can also be controlled, e.g. via the manual switch input on a motor control unit.

The application offers numerous options for blocking and priority definitions (e.g. manual-automatic).
Scenes can be saved and called up via the bus (scene control with 16 scenes).

2 digital inputs are available for the connection of binary contacts. A pushbutton, for example, can be connected here.


  • Free of potential multifunctional output for a drive (shading, window) or connection of two switchable devices (light, fan)
  • 2 binary inputs
  • Position feedback (movement position, also slat position for shutters)
  • Position storage (movement position) via 1-bit object (storage and call-up e.g. via buttons)
  • Parameters for taking drive and mechanics downtimes into account
  • Scene control for movement position with 16 scenes (also slat position for shutters)
  • Blocking objects and alarm reports have different priorities, so safety functions always take precedence (e.g. wind block)
  • Manual or automatic priority setting via time or communication object
  • Brief time limit (movement command blocked) and 2 movement limits

Configuration is made using the KNX software ETS 5.

Housing Plastic
Colour White
Assembly Flush-mounted (socket installation)
Protection category IP 20
Dimensions Diametre approx. 52 mm, depth approx. 29 mm
Weight approx. 80 g
Ambient temperature Operation -20…+70°C, storage -30…+85°C
Ambient humidity 5...80% RH, non-condensing
Operating voltage 230 V AC, 50 Hz
Output 1 × output, free of potential with 2 connections for drive up/down or 2 devices,
power supply U : up (A1) : down (A2)
Output load capacity:
5 A, maximum 270 V AC/30 V DC
Inputs 2× digital, maximum cable length 10 m
Data output KNX +/- bus connector terminal
BCU type Integrated microcontroller
PEI type 0
Group addresses max. 254
Assignments max. 254
Communication objects 86

made in germany