Description
Introduction
The ABB BMH/U2.55.1-884 is a Busch-Watchdog HF KNX 360 ° Presence Detector KNX in white matt for KNX sensor applications. It is specified as a Movement Detector HF KNX, Basic, white, with IP55 degree of protection and a circular 360 ° detection range. Explore more ABB automation devices for professional building automation projects.

Designed for professional KNX projects, the unit uses 5.8 GHz HF high-frequency radar technology, includes an integrated KNX bus coupler, and provides 2 independent channels. It supports KNX Data Secure and includes an integrated brightness sensor for lighting-related automation functions.
Key Features
- Brand: ABB.
- SKU: BMH/U2.55.1-884.
- Product ID: 2TYZ510505G0601.
- Catalog description: Busch-Watchdog HF KNX 360 ° Presence Detector KNX white matt.
- Sensor detection range: 360 °.
- Detection range by mounting height: at 2.5 m, Ø max. 10 m; at 3.0 m, Ø max. 12 m; at 4.0 m, Ø max. 10 m.
- Integrated functions include movement detector with 2 power-off stages, monitoring/surveillance function, and constant light switching with up to 2 independent channels.
- Compatible bus systems: KNX (TP); transmission standard: 2-Wire.
Benefits
- Supports KNX projects with a dedicated presence and movement detector from ABB, model BMH/U2.55.1-884.
- Provides 360 ° circular detection for ceiling-based presence detection layouts.
- Uses 5.8 GHz HF radar technology that penetrates materials such as drywall, wood, and glass.
- Includes 2 independent channels for project functions such as constant light switching or brightness-dependent switching of two light circuits.
- Offers KNX Data Secure as the listed security standard for the product.
- IP55 degree of protection supports use where this protection class is required by the project specification.
- Integrated brightness sensor supports lighting automation functions without adding a separate brightness sensor in the listed device function set.
Technical Specifications
Applications
- KNX presence detection for building automation projects requiring an ABB Busch-Watchdog HF KNX 360 ° sensor.
- Brightness-dependent switching of two light circuits where the BOQ specifies the listed BMH/U2.55.1-884 functions.
- Constant light switching applications with up to 2 independent channels.
- Monitoring or surveillance functions in KNX installations where the project documentation calls for this exact presence detector.
Installation Notes
- For recessed ceiling installation, the listed hole size is Ø 68 mm.
- For surface mounting, the product description lists use with PMA/A1.xx-88x housing.
- For British Standard box installation, the listed accessory reference is PMA/K1.1-88x.
- The product description lists VDE flush-mounted box: PMA; verify the exact PMA reference in the official ABB manuals before ordering or installation.
- Check the planned mounting height against the listed circular detection ranges: 2.5 m with Ø max. 10 m, 3.0 m with Ø max. 12 m, and 4.0 m with Ø max. 10 m.
Developer Resources
- Manufacturer product page: https://new.abb.com/products/2TYZ510505G0601/bmh-u2-55-1-884.
- Instructions and Manuals: 2CKA000073B0271.
- Instructions and Manuals (Part 2): 2CKA000073B0272.
- Instructions and Manuals (Part 3): 2CKA000073B0274.
- EAN: 6925897543819.
- E-Number Sweden: 1741105.
- KNXbazzar ABB brand page: https://knxbazzar.com/knxshop/?brand=abb.
- KNX Sensors category: https://knxbazzar.com/product-category/knx-sensors/.
FAQ
What is the exact product model for this ABB KNX presence detector?
The exact model and SKU are ABB BMH/U2.55.1-884. The Product ID is 2TYZ510505G0601. For certificates and current technical files, refer to the manufacturer technical documentation.
What detection technology does the BMH/U2.55.1-884 use?
It uses 5.8 GHz HF high-frequency radar technology and is listed as penetrating materials such as drywall, wood, and glass.
How many independent channels are available?
The product is listed with 2 independent channels.
Does this detector include KNX Data Secure?
Yes. The listed security standard is KNX Data Secure.
Is the BMH/U2.55.1-884 battery powered?
The product data lists Number of Batteries: 0.
What is the exact product model?
The order/model code for this page is BMH/U2.55.1-884. Match it against project documents before purchase.
Conclusion
The ABB BMH/U2.55.1-884 Busch-Watchdog HF KNX 360 ° Presence Detector KNX white matt is a KNX sensor with 5.8 GHz HF radar technology, IP55 degree of protection, KNX Data Secure, integrated brightness sensing, and 2 independent channels. Installers and system integrators can review our become a KNX dealer options.
For accurate B2B procurement, always verify the exact ABB model, Product ID, EAN, mounting method, and official manual references against the project BOQ before ordering.








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