The HDL-M/DM04.1 KNX 4CH 1.5A MOSFET Dimming Actuator is a DIN-rail phase dimmer for up to four independent lighting circuits. Each channel delivers 1.5 A of MOSFET dimming output, with a combined maximum of 6 A across all channels. The module accepts mains at 100–240 V AC and is controlled via the KNX bus, with per-channel manual override on the front panel.

Part of HDL's MOSFET dimming actuator family (also available in 2CH 3 A and 6CH 1.5 A variants), the M/DM04.1 supports both leading-edge and trailing-edge dimming modes. Leading edge is recommended for inductive loads; trailing edge for resistive and most LED loads. Parallel channel configuration allows combining outputs for higher current on a single circuit.

Key Features — 4 × 1.5 A MOSFET Dimming

Dimming Outputs

• 4 channels: Independent MOSFET dimming outputs at 1.5 A per channel.
• 6 A total: Maximum combined output current across all four channels.
• Leading / trailing edge: Selectable dimming mode per channel in ETS — leading for inductive, trailing for other load types.
• Parallel outputs: Channels can be paralleled for heavy-current circuits.
• Load types: Incandescent, halogen, and dimmable LED (per HDL datasheet guidance).

Application Functions (ETS)

• Scene control and scene dimming: Integration into KNX lighting scenes.
• Staircase light, flashing light, sequence control: Timed and sequenced lighting behaviour.
• Dimming limits: Upper and lower dimming level control per channel.
• Heating control (PWM): PWM output mode for compatible loads.
• Monitoring: ON-time statistics, status response, and status recovery after bus voltage return.
• Temperature: Read temperature and overheat alarm functions.

Protection and Manual Control

• Short-circuit, overload, and overheat protection on each output.
• Manual override: Per-channel switching and dimming via front-panel buttons (A, B, C, D) with status LEDs.
• Programming access: KNX programming button/LED and standard red/black bus connector.

At a Glance

Specification	Detail
Product type	KNX MOSFET phase dimming actuator — 4-fold
Model	HDL-M/DM04.1
Order code	HDL-M/DM04
Output channels	4 × 1.5 A MOSFET dimming
Total output current (max)	6 A
Mains input	100–240 V AC, 50/60 Hz
KNX bus	21–30 V DC — 20 mA consumption
Dimming modes	Leading edge / trailing edge
Configuration	ETS (KNX standard protocol)
Dimensions (H × W × D)	90 × 144 × 64 mm
Weight	412 g
Mounting	35 mm DIN rail
Protection	IP 20 (EN 60529)

Full electrical ratings, wiring diagram, and installation steps are listed under Technical Specifications. Datasheet is under Downloads.

Applications and KNX Integration

• Residential and hospitality lighting: Dim multiple zones of halogen, incandescent, or phase-dimmable LED from KNX switches and touch panels.
• Scene-based control: Recall preset lighting levels from HDL touch panels such as the HDL Granite Display (M/PTL4.1).
• Higher channel count: For six circuits at 1.5 A each, choose the HDL-M/DM06.1 6CH MOSFET Dimming Actuator (9 A total).
• 1–10 V dimming alternative: For fluorescent ballasts and 1–10 V LED drivers, HDL offers the 6CH 0–10 V dimming actuator range.
• System power: Supply the KNX bus from an HDL M/P960.1 960 mA Power Supply on large installations.

Choosing HDL MOSFET Dimming Actuators

The M/DM04.1 fits projects needing four 1.5 A dimmed circuits in a compact 144 mm-wide module. Step up to the M/DM06.1 when six channels are required, or choose the M/DM02.1 (2CH × 3 A) for fewer, higher-current circuits. All share the same MOSFET dimming platform, ETS parameterization, and protection features.