Description
Introduction
The Theben RM 8 S KNX (SKU 4940220) is a professional 8-way switching actuator designed for modern KNX building automation systems. Operating on standard KNX bus voltage with a current consumption of ≤4 mA, this unit handles switching loads up to 240 V AC across 8 independent channels. This device is part of our KNX system components range.
Engineered for high reliability in commercial and residential installations, the actuator features manual operation directly on the device, functioning even in the absence of a KNX bus connection. Integrated FIX1 LED status displays provide clear visual feedback for every output channel.
Key Features
- 8 independent output channels with NO contact design (16 A, 3 A).
- Operating voltage range of 110 V AC – 240 V AC at 50 Hz – 60 Hz.
- KNX bus powered with low bus current consumption of ≤4 mA.
- Handles up to 3680 W resistive load and 2000 W incandescent/halogen lamp load.
- Supports LED lamp loads up to 600 W (for 2-8 W and >8 W LED lamps) and 55 W (for <2 W LED lamps).
- Accommodates solid wire cross sections from 0.5 mm² to 6 mm² and stranded wire with end sleeves from 0.5 mm² to 4 mm².
- Supports conventional fluorescent lamp loads up to 2000 VA (uncorrected) and 1300 W / 140 µF (parallel-corrected).
- Class II protection rating.
Benefits
- Integrated FIX1 LED status display provides instant channel status feedback for quick diagnostics.
- Manual channel operation on the physical device allows functional control even without an active bus connection.
- Low standby power consumption of approximately 0.3 W ensures high energy efficiency.
- High switching load tolerance with max inrush current capacity of 800 A / 200 µs.
- Versatile switching capability across 8 independent channels with 16 A NO contacts.
Technical Specifications
Applications
- Centralized switching of lighting circuits across 8 independent channels in commercial and residential KNX projects.
- Automated electrical load management for high inrush current loads and LED lighting installations.
Installation Notes
- Ensure total conductor cross sections match terminal specs: solid wire 0.5 mm² to 6 mm² or stranded wire with end sleeves 0.5 mm² to 4 mm².
- Connect the KNX bus line correctly while verifying bus voltage consumption remains within the ≤4 mA nominal specification.
- Utilize manual operation controls on the device during commissioning to verify load wiring before full ETS parameterization.
Developer Resources
- Data Sheet (PDF)
- CE Declaration of Conformity (PDF)
- Information Notice EU Data Act (PDF)
FAQ
Can the Theben RM 8 S KNX be operated manually without an active KNX bus?
Yes, manual operation is available directly on the device and functions even without an active KNX bus connection. Explore more theben KNX products for professional building automation projects.
What is the maximum peak inrush current for the switching channels?
The actuator supports a maximum inrush current of 800 A for up to 200 µs. For certificates and current technical files, refer to the official product documentation.
What is the standby power consumption of this actuator?
The standby power consumption is approximately 0.3 W.
What is the exact product model?
The order/model code for this page is 4940220. Match it against project documents before purchase.
Who is the manufacturer?
This product is manufactured by theben.
Where can I find the official technical documentation?
Use the manufacturer product page and datasheets for this exact SKU. Always verify the latest revision before specifying the product.
Conclusion
The Theben RM 8 S KNX (4940220) delivers versatile 8-channel switching performance with low standby power and robust manual control options. Installers and system integrators can review our become a KNX dealer options.
Specify SKU 4940220 to ensure accurate project procurement and reliable switching for modern KNX building automation systems.
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