ABB BM/A4.1 KNX 4 Channel Movement Detector 280°

The ABB BM/A4.1 KNX Movement Detector is a professional 4-channel motion detection solution designed for automatic control of ABB i-bus KNX actuators based on movement and brightness conditions. Suitable for both indoor and outdoor applications, the BM/A4.1 provides intelligent automation control for lighting, building management, and energy-efficient systems.

Featuring advanced PIR detection technology, integrated KNX bus communication, Bluetooth commissioning, and flexible parameter adjustment, the ABB BM/A4.1 delivers reliable movement detection with precise control and easy installation.

With high-quality optics, adjustable detection areas, automatic range stabilisation, and advanced interference suppression, the BM/A4.1 is designed for professional KNX installations requiring dependable occupancy detection and intelligent automation.

Advanced KNX Movement Detection

The ABB BM/A4.1 provides automatic switching of ABB i-bus KNX actuators depending on movement detection and brightness levels.

Ideal applications include:

✅ KNX smart home automation systems
✅ Automatic lighting control
✅ Commercial building automation
✅ Office and workplace environments
✅ Indoor and outdoor movement detection applications

The detector enables intelligent control of connected KNX devices by responding automatically to occupancy and environmental conditions.

4 Channel KNX Motion Control

The ABB BM/A4.1 includes four independent movement channels for flexible automation programming.

Key features include:

✅ 4 movement channels
✅ Up to 10 KNX functions controllable via smartphone/tablet app
✅ Additional switch-on possibility via push-button object
✅ Programmable RGB LED status indicator with 5 functions
✅ Integrated KNX bus coupler

This provides installers with flexible options for creating customised automation functions.

High Performance PIR Detection Technology

The ABB BM/A4.1 uses advanced PIR sensor technology with a high-quality optical system for accurate movement detection.

Detection features include:

✅ 4 PIR sensors
✅ 280° sensor angle
✅ High-quality lens for optimum detection
✅ Ground detection
✅ Rear-field detection
✅ Automatic range stabilisation
✅ Automatic interference suppression
✅ Automatic dazzle-proofing

The advanced detection system provides reliable operation while reducing unwanted activation caused by external interference.

Adjustable Detection Area

The ABB BM/A4.1 allows precise adjustment of the detection zone to suit different installation environments.

Adjustment features include:

✅ Optical system level balancing ±30°
✅ Horizontal orientation +90° / -60°
✅ Vertical orientation +30° / -30°
✅ Individual detection range adjustment using protective foil
✅ Adjustable detection area for project requirements

This flexibility allows the detector to be configured for optimal coverage in each application.

Intelligent Brightness & Temperature Monitoring

The ABB BM/A4.1 includes integrated environmental measurement functions for advanced KNX automation.

Features include:

✅ Twilight / brightness channel with three switching thresholds
✅ Temperature channel with three switching thresholds
✅ Outdoor temperature measurement
✅ Ambient brightness measurement
✅ Brightness-dependent automation control

These functions allow connected KNX systems to react intelligently to changing environmental conditions.

Bluetooth Smartphone Commissioning

The ABB BM/A4.1 provides convenient setup and adjustment using Bluetooth connectivity.

Features include:

✅ Remote operation via Bluetooth
✅ Smartphone and tablet app support
✅ Adjustment of switch-on brightness
✅ Adjustment of switch-off delay
✅ Permanent ON setting
✅ Permanent OFF setting
✅ Test mode adjustment

The optional ABB SmartConnect app allows quick commissioning of basic and additional parameters.

Advanced Testing & Installation Features

The ABB BM/A4.1 includes professional features designed to simplify installation and commissioning.

Benefits include:

✅ Brightness-independent test mode
✅ Native ETS application required
✅ Programming via connected KNX bus voltage
✅ Integrated dismounting protection
✅ Bus connection via enclosed terminal block

These functions provide installers with greater control during setup and maintenance.

Flexible Timing & Control Settings

The ABB BM/A4.1 offers adjustable operating parameters to suit different automation requirements.

Features include:

✅ Switch-off delay adjustment from 10 seconds to 18 hours
✅ Adjustable switch-on brightness
✅ Adjustable switch-off delay
✅ Permanent ON function
✅ Permanent OFF function

This allows the detector to be customised for different environments and usage patterns.

Technical Specifications

☑️ Brand: ABB
☑️ Model: BM/A4.1
☑️ Product Type: KNX Movement Detector
☑️ Technology: KNX
☑️ Application: Indoor and Outdoor Areas
☑️ Number of Movement Channels: 4
☑️ Sensor Technology: PIR
☑️ Number of PIR Sensors: 4

☑️ Sensor Angle: 280°

☑️ Detection Area:
Frontal: 16m
Lateral: 16m

☑️ Surveillance Density:
106 sectors with 424 switching segments

☑️ Installation Height: 2.5m

☑️ Twilight Limiting Values: 1 – 1,000 Lux

☑️ Brightness Limiting Values: 1,000 – 80,000 Lux

☑️ Switch-Off Delay: 10 seconds to 18 hours

☑️ Bus Voltage: 24V

☑️ Integrated KNX Bus Coupler: Yes

☑️ Additional Power Supply Required: No

☑️ Power Consumption: 0.3W

☑️ Current Consumption: 12mA

☑️ Protection Class: IP55

☑️ Operating Temperature Range: -25°C to +55°C

☑️ Storage Temperature Range: -25°C to +70°C

☑️ Dimensions (H x W x D): 124mm x 110mm x 158mm

Ideal Applications

🏠 KNX smart home automation systems
💡 Automatic lighting control solutions
🏢 Commercial building automation
🏨 Hotels and hospitality environments
🌳 Outdoor movement detection systems
🏗️ Professional KNX installation projects

Why Choose The ABB BM/A4.1?

🚀 Professional 4-channel KNX movement detector for intelligent automation

🎯 280° detection coverage with advanced PIR technology

💡 Automatic control based on movement and brightness conditions

📱 Bluetooth smartphone commissioning simplifies setup and adjustment

🛠️ Adjustable detection area provides installation flexibility

🏆 Reliable ABB KNX technology for residential and commercial automation

Additional Information

🌟 ABB i-bus KNX professional movement detection solution

🏆 Designed for accurate indoor and outdoor automation control

🛠️ Advanced detection and commissioning features included

📱 Smartphone app and ETS configuration support

📦 Supplied as an individual ABB BM/A4.1 KNX movement detector

🚚 FREE delivery on orders over £100

📞 Contact us for project quotations, technical support, and trade pricing