The ABB 6131/20-24-500 KNX Presence Mini W is a compact ceiling-mounted presence and movement detector for ABB i-bus® KNX projects. With 360° detection, 2 independent channels, and integrated constant light control, it manages up to two lighting zones based on occupancy and measured room brightness — ideal for energy-efficient office, corridor, and meeting-room automation.

The discreet white matt housing (RAL 9016) suits surface mounting or false-ceiling installation with a Ø 68 mm cut-out. An integrated KNX bus coupler eliminates the need for a separate coupler unit.

Key Features and Detection Capabilities

The Presence Mini W combines PIR presence detection with dual-channel constant-light regulation in a low-profile 80 × 80 mm form factor.

Detection and Control

• 360° sensor range: Circular detection pattern; usable as presence and/or movement detector.
• 2 channels: Independent control of two light bands with brightness-dependent switching and regulation.
• Constant light control: Maintains target illuminance via up to two independent outputs.
• 2 power-off stages: Multi-level switching for staged energy reduction.
• Integrated monitoring: Detector application with built-in monitoring function.
• Fast response: Minimum switch-on time of 10 seconds.

Detection Range by Mounting Height

Circular detection diameter (Ø) varies with ceiling height:

• At 2.5 m: Seated persons up to Ø 5 m; walking persons up to Ø 6.5 m.
• At 3 m: Seated persons up to Ø 6.5 m; walking persons up to Ø 8 m.
• At 4 m: Seated persons up to Ø 9 m; walking persons up to Ø 10.5 m.

At a Glance

Specification	Detail
Product type	KNX presence detector, 2-channel, constant light
Order code	6131/20-24-500 (2CKA006132A0342)
Detection angle	360°
Channels	2 independent
Mounting	Ceiling — surface or false ceiling (9 … 25 mm board)
Cut-out	Ø 68 mm
Dimensions (W × H × D)	80 × 80 × 45 mm (visible height 16 mm)
Finish	Traffic white RAL 9016, matt
Protection	IP20
Bus system	KNX twisted pair (TP)

Full installation constraints, classification codes, and EAN 4011395185889 are listed under Technical Specifications.

Applications and KNX Integration

• Office and meeting rooms: Dual-zone constant-light control for desk and presentation areas from one detector.
• Corridors and circulation: Movement-triggered switching with staged power-off for overnight energy savings.
• False-ceiling fit-out: Low 16 mm visible profile integrates cleanly into suspended ceilings.
• Dimming integration: Pair with KNX dimming actuators such as UD/S4.210.2.1, UD/S6.210.2.1, or UD/S4.315.2.1 for occupancy- and daylight-linked dimming.
• ETS configuration: Import the official .knxprod application (Downloads), set detection zones, brightness thresholds, and channel assignments.

Installation Notes

Suitable for surface mounting or false ceilings with board thickness 9 … 25 mm and hole size Ø 68 mm. Optimum mounting height is 2 m. Not suitable for British Standard or VDE flush-mounted boxes — ABB recommends a dedicated installation housing for flush-mount applications.