theben DM 4 T KNX 4-Way Universal Dimmer Actuator (4940275)

Description

Introduction

The theben DM 4 T KNX (SKU: 4940275) is a high-performance 4-way universal dimmer actuator engineered for seamless integration into KNX building automation networks. Designed for DIN rail installation, this FIX2 series device provides versatile dimming control across four independent channels, accommodating dimmable LED lamps, incandescent lights, low-voltage and high-voltage halogen lamps, as well as dimmable energy-saving lamps. This device is part of our professional KNX Actuators range.

Operating on a main voltage supply of 230 V AC at 50 Hz and powered on the bus side via standard KNX bus voltage (≤4 mA), the actuator optimizes energy management with a low stand-by consumption of approximately 1.5 W. Built to Protection Class II standards according to EN 60 669, it delivers robust and reliable lighting control for modern B2B commercial and residential KNX projects.

Key Features

• 4-channel universal dimmer actuator in FIX2 housing series.
• KNX bus powered (≤4 mA) with 230 V AC 50 Hz operating voltage.
• Supports trailing edge (RC-mode) up to 400 W for dimmable energy-saving lamps.
• Terminal screws supporting solid wire cross-sections from 0.5 mm² to 6 mm² and stranded wire from 0.5 mm² to 4 mm².
• Standard KNX bus terminal connection for fast bus line integration.
• Designed for standard DIN rail mounting with an 8-module width.

Benefits

• Offers 4 independent output channels for flexible dimming across multiple lighting zones.
• Broad lamp compatibility covering dimmable LED, incandescent, low-voltage, high-voltage halogen, and energy-saving lamps.
• Low stand-by power consumption of approximately 1.5 W helps lower ongoing operational costs.
• High level of electrical safety compliance with Protection Class II rating under EN 60 669.
• Standard DIN rail mounting format simplifies distribution panel layout and installation.

Technical Specifications

Specification	Value
Operating voltage KNX	Bus voltage, ≤4 mA
Operating voltage	230 V AC, 50 Hz
Frequency	50 Hz
Lamp types	Incandescent, low-voltage and high-voltage halogen and dimmable energy saving lamps and LED
Incandescent/halogen lamp load	400 W
Energy saving lamps	Trailing edge (RC-mode): 400 W
Stand-by consumption	~1.5 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
Information Notice EU Data Act	Available (PDF)
CE declaration of conformity	Available (PDF)
Data sheet	Available (PDF)
Width	8 modules
Max. cable length	100 m
Installation type	DIN rail
Protection class	II according to EN 60 669
Type of connection	Terminal screws | Bus connection: KNX bus terminal
Switching capacity min.	5 W
Ambient temperature	-5°C … 45°C
Operating instructions	Available (PDF)

Applications

• Centralized dimming control for commercial office spaces, conference rooms, and hospitality environments connected to a KNX system.
• Versatile residential lighting automation incorporating varied lighting technologies such as LEDs, halogen, and incandescent loads.

Installation Notes

• Mount the actuator on a standard DIN rail inside a distribution panel, keeping within the ambient operating temperature range of -5°C to 45°C.
• Connect load circuits and mains supply (230 V AC, 50 Hz) using suitable solid wire (0.5 to 6 mm²) or stranded wire with end sleeves (0.5 to 4 mm²).
• Attach the KNX bus connection using the provided bus terminal, verifying that maximum cable length limits (100 m) are respected.

Developer Resources

• Official theben Data Sheet (PDF)
• Operating Instructions Manual (PDF)
• CE Declaration of Conformity (PDF)
• Information Notice EU Data Act (PDF)

FAQ

How many dimming channels does the theben DM 4 T KNX provide?

The DM 4 T KNX provides 4 independent channels for controlling lighting loads. Explore more products from theben for professional building automation projects.

Which lamp types are compatible with this theben actuator?

It is compatible with dimmable LED lamps, incandescent lamps, low-voltage and high-voltage halogen lamps, and dimmable energy-saving lamps. For certificates and current technical files, refer to the manufacturer technical documentation.

What is the stand-by power consumption of the device?

The device has a low stand-by consumption of approximately 1.5 W.

What cable sizes can be connected to the terminal screws?

The terminals support 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 4940275. Match it against project documents before purchase.

Who is the manufacturer?

This product is manufactured by theben.

Conclusion

The theben DM 4 T KNX (SKU: 4940275) offers an ideal 4-channel dimming solution for modern KNX installations, blending flexible load compatibility, low standby power, and robust DIN-rail engineering. Installers and system integrators can review our professional project support options.