KNX S1R-B4 compact

Multifunctional Actuator, 4 Binary Inputs


  • Multifunctional for 1 drive (blind actuator, roller shutter actuator, window actuator, awning actuator) or 2 devices (switching actuator)
  • With shading control / sunshade control
  • Inputs for local push-buttons
  • Compact design for can installation

The Actuator KNX S1R-B4 compact with integrated façade control has got a multifunctional output which can connect to either a drive with Up/Down control (blinds, awnings, shutters, windows) 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.

Automation can be specified externally or internally. Internally, there are numerous options available for blocking, locking (e.g. master-slave) and priority definitions (e.g. manual-automatic). Scenes can be saved and called up via the bus (scene control with 16 scenes).

4 digital inputs are available for the connection of binary contacts. A zero position sensor or pushbutton, for example, can be connected here.

• Free of potential multifunctional output for a 230 V drive (shading, windows) or connection of two switchable devices (light, fan)
• 4 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
• Control via internal or external automation functions
• Integrated shade control with slat adjustment for shutters based on the position of the sun
• Scene control for movement position with 16 scenes (also slat position for shutters)
• Mutual locking of two drives using zero position sensors prevents collisions e.g. of shade and window (master-slave)
• 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 (installation in electronics box)
Dimensions Ø approx. 53 mm, depth approx. 24 mm
Total weight approx. 40 g
Ambient temperature -5...+45 °C
Ambient humidity 5...80% RH, non-condensing
Storage temperature -30…+85 °C
Overvoltage category III
Degree of contamination 2

KNX bus:

Medium TP1-256
Configuration mode S-Mode
Group addresses max. 254
Assignments max. 254
Communication objects 156
Nominal voltage 30 V DC SELV
Power consumption Relays not energised: 12 mA
2 relays energised: 25 mA
Connection (plug terminals) KNX
Conductor diameter plug-in terminals 0.6…0.8 mm² s
Stripping length 5 mm
Duration after bus voltage restoration until data is received approx. 5 s

Binary inputs:

Number 4
Type Contacts
Design (SELV) are at KNX potential
Pluggable cable length approx. 30 cm
Pluggable cable wire end ferrule 0.14 mm², 8 mm
Maximum cable length 10 m
Contact voltage approx. 5 V
Contact current approx. 1 mA
Connection Connection cable pluggable

Potential free output:

Number 2
Screw terminals for 0.5...2.5 mm²
Normally open contact μ (< 1.2 mm)
Configuration for one drive (up/down) or as 2× single contacts
Rated voltage 250 V AC
Switching current (ohmic) max. 4 A
Total current (secured with integrated T4A/250 V fuse) max. 4 A
Motor max. 600 VA
LEDi (SBL) lamps per contact max. 15 W
Fluorescent lamps/CFL/LED (electronic ballast) per contact max. 36 W