Busch-Jaeger Busch-Wächter 280 KNX aanwezigheidsmelder, studiowit 2CKA006132A0432

For building automation professionals installing KNX systems in offices, conference rooms, or residential spaces, the Busch-Waechter 280 KNX presence detector provides reliable occupancy and brightness-based control. This flush-mounted ceiling sensor combines presence detection, motion sensing, brightness measurement, and temperature monitoring in a single device, enabling energy-efficient lighting and HVAC management.

Key specifications

• KNX bus system, powered via 21-30 V DC bus voltage
• 280° detection angle with presence range up to Ø 6 m and motion range up to Ø 10 m at 2.5 m mounting height
• Integrated brightness sensor measuring 10–2000 lux for constant light control
• Temperature measurement from 0 to 40 °C for HVAC integration
• Up to 4 independent channels for light, HVAC, presence, and monitoring functions
• Adjustable sensitivity, time delay, lux values, and operating modes via KNX commissioning
• Housing made of thermoplastic (PC), colour: studio white
• Indoor use, protection class IP20

Why choose it

The Busch-Waechter 280 KNX offers multi-sensor functionality in a compact flush-mounted design, reducing the need for separate devices. Its 280° coverage and precise brightness control help meet energy efficiency goals while maintaining occupant comfort.

Ideal use cases

• Automatic lighting control in open-plan offices based on presence and daylight
• HVAC setback or boost triggered by room occupancy
• Presence-dependent switching of ventilation or other loads
• Monitoring of room conditions for building management systems

Good to know

The detector is designed for ceiling installation at a recommended height of 2.5 m. Commissioning and parameter adjustment are performed via ETS software over the KNX bus.