theben RM 4 I KNX 4-Way C-Load Switching Actuator with Current Recognition (4940210)

Description

Introduction

The theben RM 4 I KNX (Item no. 4940210) is a high-performance 4-way C-load switching actuator FIX1 designed for professional KNX building control systems. Engineered to reliably manage higher lamp loads, this actuator provides switching across 4 independent channels and operates via standard KNX bus voltage (≤4 mA) alongside a main supply voltage of 110 V AC – 240 V AC at 50 Hz – 60 Hz. This device is part of our KNX system devices range.

A defining feature of the RM 4 I KNX is its integrated current recognition functionality, allowing precise load monitoring across connected outputs down to a lowest measurable value of 150 mA. Built to handle extreme peak inrush currents up to 1500 A / 200 µs, this switching actuator provides dependable operation for modern lighting loads, including LED drivers, fluorescent ballasts, and resistive loads up to 3680 W.

Key Features

• 4 independent switching output channels with NO contact design (16 A, 10 A).
• Built-in current measurement with ±8% accuracy for I > 1 A and ±100 mA for I < 1 A.
• High C-load handling capacity rated for maximum capacitive loads up to 200 µF.
• KNX bus-powered operation drawing a maximum bus current of ≤4 mA.
• Main operating voltage range covering 110 V AC to 240 V AC at 50 Hz to 60 Hz.
• Supports LED (<2 W, 2-8 W, >8 W), incandescent, halogen, energy-saving, and fluorescent lamp loads.

Benefits

• Integrated current recognition enables detailed monitoring of connected electrical loads down to 150 mA.
• High peak inrush current tolerance up to 1500 A / 200 µs specifically designed for C-load capacitive switching demands.
• Versatile load compatibility supporting LED lamps up to 850 W and resistive loads up to 3680 W.
• Low standby energy consumption rated at approximately 1.3 W for enhanced efficiency.
• Flexible wiring connections accepting solid conductors up to 6 mm² and stranded conductors with end sleeves 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
Fluorescent lamp load (conventional) parallel-corrected	2000 W (200 µF)
Fluorescent lamp load (electronic ballast)	1650
Energy saving lamps	410
LED lamp < 2 W	75
LED lamp 2-8 W	850
LED lamp > 8 W	850
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	~1.3 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	4
Type of contact	NO contact, 16 A, 10 A
Resistive load	3680
Capacitive load	200 µF
Information Notice EU Data Act	PDF

Applications

• Commercial and residential KNX lighting control requiring C-load switching for LED drivers and electronic ballasts.
• Load monitoring and circuit status detection in automated building systems via integrated current recognition.
• High-capacity switching applications where extreme inrush currents are present.

Installation Notes

• Connect to the KNX bus line ensuring bus current consumption remains within ≤4 mA.
• Supply the main operating voltage between 110 V AC and 240 V AC, 50 Hz – 60 Hz.
• Observe terminal wiring limits: 0.5 mm² to 6 mm² for solid conductors, or 0.5 mm² to 4 mm² for stranded conductors with end sleeves.

Developer Resources

• Consult the official theben RM 4 I KNX datasheet for ETS configuration parameters and object structure.
• Refer to the official EU Data Act information notice available in PDF format via the manufacturer documentation basket.

FAQ

What is the maximum inrush current capacity of the theben RM 4 I KNX?

The actuator supports a maximum inrush current of 1500 A / 200 µs, designed to handle high capacitive loads. Explore more theben building automation products for professional building automation projects.

How accurate is the built-in current measurement function?

For currents greater than 1 A, accuracy is ±8% of the measured value. For currents under 1 A, accuracy is ±100 mA, with a lowest measurable threshold of 150 mA. For certificates and current technical files, refer to the official theben documentation.

What cable sizes can be connected to the terminals?

The terminals accept solid wire from 0.5 mm² to 6 mm² and stranded wire with end sleeves from 0.5 mm² to 4 mm².

How many channels does this actuator provide?

The RM 4 I KNX features 4 independent switching channels with NO contacts rated for 16 A and 10 A.

What is the exact product model?

The order/model code for this page is 4940210. Match it against project documents before purchase.

Who is the manufacturer?

This product is manufactured by theben.

Conclusion

The theben RM 4 I KNX (4940210) offers a robust 4-way C-load switching solution engineered to endure high inrush peak currents while delivering accurate current recognition across all channels. Installers and system integrators can review our become a KNX dealer options.

Its broad load compatibility and low standby consumption make it a dependable component for advanced KNX automation systems.