KNX RGBW 4CH for dynamic color and white lighting management

System architecture and features for professional RGBW automation

Standard

The KNX RGBW 4-channel controllers and drivers enable regulation of color, dedicated white channel, and light intensity for RGBW LED loads via the KNX bus (TP/IP/RF). Configuration is done through ETS (scenes, groups, logic, schedulers). Versions are available with 12/24/36/48 V DC and 110/220 VAC inputs, offering constant voltage (CV) or constant current (CC) outputs.

System architecture

  • KNX RGBW 4CH: DIN-rail or flush-mounted modules for independent management of R/G/B/W channels and creation of color mixes with real white tone.
  • User interfaces: KNX push buttons/panels, touch panels, and visual displays; binary inputs for traditional push buttons.
  • KNX sensors: presence and lux sensors for automatic logic (on/off, dimming, daylight harvesting, color/white scenes).
  • Integration gateways: conversion to DALI (e.g. DT8 XY/TC), DMX, or 0–10V; via KNX IP communication with BACnet/BMS is possible for energy supervision and HVAC integration.
  • Bus power supply: KNX TP line with power supply and line/area couplers for large multi-zone installations.

Advanced features

  • RGB + dedicated white: color mixing with a W channel for real white, high lumen output, and superior CRI.
  • White Priority / RGBW Mix: smooth transitions between white and color scenes while maintaining chromatic accuracy.
  • Dynamic scenes: color cycles, custom palettes, soft transitions, and scene recall via KNX bus.
  • KNX bus control: scenes, groups, time/conditional logic, environmental profiles, and event synchronization.
  • ETS commissioning: parameter setup for dimming curves, ramps, fade times, min/max levels, and power-on state.
  • Wired reliability: stable low-voltage communication immune to radio interference.
  • Deep dimming <1%: smooth and uniform adjustment without visible flicker.
  • Multiprotocol integration: KNX–DALI/DMX or BACnet bridge to extend lighting scenes, supervision, and building automation.
  • High-frequency PWM: 250–500 Hz (entry), 1–4 kHz (mid), 8–16 kHz (high-end), suitable for retail, hospitality, and video recording.
  • Efficiency and comfort: white channel use enables more efficient “white” scenes than pure RGB, ensuring visual comfort and chromatic consistency.

Typical applications

  • Circadian cycles + chromotherapy: studios, clinics, spas, and wellness centers with dynamic RGBW lighting supporting psychophysical wellbeing and natural biorhythms.
  • Emotional showers: multisensory sequences combining light, color, sound, and aroma for relaxation and deep regeneration.
  • Advanced residential: living rooms, bedrooms, and home entertainment areas with quick switching between functional white and RGBW scenic effects.
  • Offices and corporate spaces: creative areas, receptions, and event halls with color/white scenes for branding and visual comfort.
  • Hospitality: hotels, lounges, and restaurants with personalized atmospheres and smooth transitions.
  • Retail and showrooms: showcases and corners with dynamic RGBW lighting and high-CRI white to enhance materials and products.
  • Museums/exhibitions: uniform washes, accent lighting, and timed scenes for cohesive exhibition paths.
  • Hybrid installations: KNX + DMX/DALI for complex lighting scenes, fine dimming control, and BMS supervision.

Available types

  • KNX RGBW 4CH: digital four-channel control for red/green/blue/white LED loads.