N 554D31 5WG1554-1DB31 KNX Universal Dimmer 4 Channel 300VA Bundle to 1000VA LED 8MW

The N 554D31 is a four-channel universal dimmer from the rail-mounted range, featuring unique output bundling capabilities. This versatile actuator allows two, three, or all four adjacent channels to be switched in parallel, enabling power concentration from the nominal 4×300 VA configuration up to a single 1000 VA circuit.

Outputs & Bundling: Four dimming channels of 300 VA each. Bundling adjacent outputs increases permissible load to 500 VA (two channels), 750 VA (three channels), and 1000 VA (all four channels). Unbundled channels maintain 300 VA rating.

Mains Data: AC 230 V, 50/60 Hz, rated current 1.3 A. Compatible with dimmable LED loads with no minimum load requirement per output.

Protection Features: Each output includes electronic protection against overload, short circuit, and temperature rise. Status reporting available for overload, short circuit, and overtemperature conditions.

Note: Load capacities assume standard mounting position with load terminals facing up. In other positions, permissible load reduces to 80%.

Terminals & Local Control: Maintenance-free terminals for 0.5 to 2.5 mm² conductors (single-core, stranded, or multi-core). Front-facing pushbuttons for switching, dimming, and direct mode activation.

• Channel operation modes: normal, one-level timer, two-level timer, blinking
• Adjustable on/off delays and dimming times (0-100%)
• Configurable dimming curves for challenging luminaires
• Additional dimming object with independent timing
• Minimum/maximum dimming values settable by parameter or object
• 8-bit scene control supporting up to eight scenes
• Night mode with time-limited switching
• Operating-hour and load-cycle counters with threshold monitoring
• Building-site function for pre-configuration bundling and lighting
• Device surveillance and status retrieval objects

Housing & Documentation: DIN rail device compliant with DIN EN 60715, eight module widths (144 mm). Data sheet A6V11418996, application program 9A0401, requires ETS 4.2 or higher.

The unique bundling capability makes this dimmer ideal for diverse applications. Banks, hotels, and conference centers utilize output bundling for large dimmable circuits, while restaurants, church interiors, showrooms, and residential living areas employ separate channels for layered lighting designs.

With hundreds of VA per channel and no minimum load requirements, this device is perfectly suited for LED retrofit projects involving multiple modestly loaded zones.