theben RM 8 I KNX 8-Way C-Load Switching Actuator with Current Recognition (4940215)

Description

Introduction

The theben RM 8 I KNX (SKU: 4940215) is an 8-channel C-load switching actuator designed for professional KNX building automation systems. Engineered to handle high capacitive and lamp loads, this FIX2 series module features integrated current measurement per channel to support load monitoring and operational transparency. This device is part of our KNX Actuators products range.

Operating on a standard KNX bus voltage with a current draw of ≤4 mA and a mains voltage of 110 V AC to 240 V AC at 50/60 Hz, the unit provides robust switching performance across 8 output channels while accommodating high peak inrush currents up to 1500 A for 200 µs.

Key Features

• 8-way FIX2 C-load switching actuator with integrated current measurement.
• High inrush current capacity up to 1500 A / 200 µs.
• Current measurement accuracy of ± 8 % (>1 A) and ± 100 mA (<1 A).
• Broad mains voltage range of 110 V AC to 240 V AC (50-60 Hz).
• Supports up to 3680 W resistive load and 200 µF capacitive load per output.
• Handles LED lamp loads up to 850 W (for >2 W LEDs) and 75 W (for <2 W LEDs).

Benefits

• Provides reliable control across 8 independent channels with NO contacts rated for 16 A and 10 A switching.
• Integrated current recognition capability allows precise load monitoring down to 150 mA.
• Capable of safely switching high peak inrush currents up to 1500 A / 200 µs without contact sticking.
• Supports high lamp loads including up to 2600 W for incandescent/halogen lamps and 850 W for LED loads.
• Energy-efficient design featuring a low stand-by power consumption of approximately 2.4 W.
• Flexible wiring connection options supporting solid wires up to 6 mm² and stranded wires up to 4 mm².

Technical Specifications

Specification	Value
Operating voltage KNX	Bus voltage, ≤4 mA
Operating voltage	110 V AC – 240 V AC, 50 Hz – 60 Hz
Frequency	50 – 60 Hz
Incandescent/halogen lamp load	2600 W
Fluorescent lamp load (conventional) parallel-corrected	2000 W (200 µF)
Fluorescent lamp load (electronic ballast)	1650 W
Energy saving lamps	410 W
LED lamp < 2 W	75 W
LED lamp 2-8 W	850 W
LED lamp > 8 W	850 W
Inrush current	max. 1500 A / 200 µs
Voltage output	240 V AC
Accuracy current measurement	I > 1 A: ± 8 % of measured value; I < 1 A: ± 100 mA; lowest measurable value: 150 mA
Stand-by consumption	~2.4 W
Max. cable cross section	Solid wire: 0.5 mm² (Ø 0.8) to 6 mm² | Stranded wire with end sleeve: 0.5 mm² to 4 mm²
Number of channels	8
Type of contact	NO contact, 16 A, 10 A
Resistive load	3680 W
Capacitive load	200 µF
Information Notice EU Data Act	PDF

Applications

• Commercial and residential KNX lighting control where high peak inrush currents from LED ballasts or fluorescent drivers occur.
• Load monitoring and energy consumption tracking via integrated channel current measurement in commercial smart buildings.
• Automated switching of capacitive and resistive loads in centralized KNX electrical distribution boards.

Installation Notes

• Connect the bus line to the standard KNX terminal; ensure KNX bus power draw remains ≤4 mA.
• Ensure supply line wiring matches the supported cable cross-section: 0.5 mm² to 6 mm² for solid wire or 0.5 mm² to 4 mm² for stranded wire with end sleeve.
• Verify mains operating voltage is within 110 V AC to 240 V AC at 50–60 Hz prior to powering the device.

FAQ

What is the primary function of the theben RM 8 I KNX actuator?

The theben RM 8 I KNX (4940215) is an 8-channel switching actuator designed for controlling C-loads and high lamp loads while providing built-in current measurement per channel. Explore more theben automation devices for professional building automation projects.

What is the maximum peak inrush current supported by this unit?

The actuator supports a maximum peak inrush current of 1500 A for a duration of 200 µs. For certificates and current technical files, refer to the official product documentation.

What is the accuracy of the integrated current measurement?

For currents above 1 A, the accuracy is ± 8 % of the measured value. For currents below 1 A, accuracy is ± 100 mA, with a lowest measurable threshold of 150 mA.

What cable cross-sections can be used for electrical installation?

It accepts solid wire from 0.5 mm² to 6 mm² and stranded wire with end sleeves from 0.5 mm² to 4 mm².

What is the exact product model?

The order/model code for this page is 4940215. Match it against project documents before purchase.

Who is the manufacturer?

This product is manufactured by theben.

Conclusion

The theben RM 8 I KNX 8-way switching actuator (SKU 4940215) delivers high performance and current monitoring capabilities for demanding KNX switching applications. With support for up to 1500 A peak inrush current, it provides an exceptional solution for high-capacity lighting and C-load management. Installers and system integrators can review our installer purchasing support options.