Theben DM 4-2 T KNX

Ref: 4940280

Code Description log-in log-in Quantity
KNX-0001 Theben DM 4-2 T KNX log-in log-in



  • 4-way universal dimmer actuator FIX1
  • For dimming dimmable LED, incandescent lamps, LV, HV halogen lamps and energy saving lamps
  • Also suitable for dimming of dimmable energy-saving lamps
  • Also suitable for controlling fans
  • LED switching status display for each channel
  • Manual operation on device
  • Dimming output: 200 W per channel
  • Automatic load detection (can be deactivated)
  • For R, L and C loads

Detailed Description

The dimming actuator has one manual button each for 4 channels.
When manual mode is activated the dimmer can only be operated with the buttons.
Bus telegrams will not be executed.

2 buttons and 2 LEDs are available for each channel.
The upper LEDs show the current state (LED on = dimming value > 0 %):

DM 4-2 T KNX

The device dims down to 0 % in the event of excess temperature or a short circuit in the load, and the lower LED flashes.
In case of a short circuit, the lower and the upper LED of the channel will flash. If a button is blocked, the corresponding LED will flash.

The upper buttons switch on the corresponding channel and increase the dimming value by 25 % when pressing the button.
The lower buttons decrease the dimming value by 25 % and switch off the channel when pressing the button.

In standard operation:
Pressing a button establishes the desired dimming value.
A status established via the channel button can be overwritten via the bus at any time.

In manual operation with the manual button or Manual object:

If the “manual” function is selected, the associated LED lights up.
Any time functions that are running (e.g. soft switching) will be terminated.
The dimming status will be frozen and can only be changed via the channel buttons.
Bus telegrams will not be executed anymore.

The “Manual” state will be reset in the event of a mains failure.
After manual operation has been cancelled, already received bus events will not be executed again.


Operating voltage KNX Bus voltage, ≤10 mA
Operating voltage 230 – 240 V AC 50 – 60 Hz
Frequency 50 – 60 Hz
Stand-by consumption <1 W
Width 4 modules
Installation type DIN rail
Type of connection Terminal screws | Bus connection: KNX bus terminal
Max. cable cross section Solid wire: 0.5 mm² (Ø 0.8) to 4 mm² | Stranded wire with end sleeve: 0.5 mm² to 2.5 mm²
Number of channels 4
Lamp types Incandescent, low-voltage and high-voltage halogen and dimmable energy saving lamps and LED
Incandescent/halogen lamp load 200 W
LED lamp Trailing edge (RC-mode): 200 W
Energy saving lamps Trailing edge (RC-mode): 200 W
Switching capacity min. 2 W
Max. cable length 100 m
Ambient temperature -5°C … 45°C
Type of protection IP 20
Protection class II according to EN 60 669



KNX-0001_4940280_Operating instructions.pdf

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