THEBEN THE DM 8-2 T KNX Universal Dimming Actuator, 8-Channel, 250 W/VA per Channel, DIN Rail

With a robust 250 W/VA per channel and a total capacity of 2000 W/VA, the THEBEN THE DM 8-2 T KNX Universal Dimming Actuator delivers high-performance lighting control for professional KNX installations. Its universal dimming principle automatically detects leading or trailing edge, ensuring compatibility with a wide range of loads including dimmable LEDs, CFLs, halogen, and incandescent lamps.

Overview

This 8-channel dimming actuator is engineered for DIN rail mounting, occupying just 4 TE (72 mm) of space. It operates on 230 V AC mains and connects to the KNX bus (21-30 V DC) for seamless integration into building automation systems. Manual operation with status display is available per channel, allowing on-site testing and control without bus communication.

What stands out

• Universal dimming: auto-detects leading edge and trailing edge for optimal performance with various load types.
• High load capacity: up to 250 W/VA per channel (resistive/inductive) and 100 W/VA for capacitive/LED loads.
• Comprehensive protection: overload, short-circuit, and over-temperature safeguards ensure reliability.
• Flexible control: supports up to 16 scenes, status feedback, and manual operation with LED indicators.
• Compact design: only 4 TE wide, saving valuable space in distribution boards.

Technical details

• Product type: Universal Dimming Actuator
• Number of channels: 8
• Operating voltage: 230 V AC, 50/60 Hz
• KNX bus voltage: 21-30 V DC
• Max load per channel (resistive/inductive): 250 W/VA
• Max load per channel (capacitive/LED): 100 W/VA
• Total max load: 2000 W/VA
• Mounting type: DIN rail
• Module width: 4 TE (72 mm)
• Manual operation: Yes, per channel with status display
• Scene functionality: Yes, up to 16 scenes
• Status feedback: Yes (switching status, dimming value, error messages)
• Protection functions: Overload, short-circuit, over-temperature
• Protection class: IP20
• Operating temperature: -5 °C to +45 °C
• Connection type: Screw terminals
• ETS version: ETS5 or higher
• LED indicators: Yes

Our verdict

The THEBEN DM 8-2 T KNX is a versatile and reliable choice for lighting control in KNX projects. Its universal dimming capability and robust protection features make it suitable for a wide range of applications, from residential to commercial buildings. The compact DIN rail design and manual operation add to its practicality for installers and integrators.