Description
Introduction
ABB WES/A4.1.1 is a Weather Sensor Basic listed under KNX Sensors for projects that require verified detection of outdoor weather and light-related values. According to the product data, the device detects wind speed, rain, brightness in up to 4 directions depending on the Weather Unit, twilight, temperature, day/night, and date and time over a GPS signal.

This product works in conjunction with the Weather Unit WZ/S1.3.1.2. It is designed for mast mounting, and wall installation requires the wall mounting adapter WB/Z1.1.1, which must be ordered separately.
Key Features
- Brand: ABB
- SKU and model reference: WES/A4.1.1
- Product type: Weather Sensor Basic in the KNX Sensors category
- Detects wind speed and rain
- Detects brightness in up to 4 directions, depending on the Weather Unit
- Detects twilight, temperature, and day/night
- Receives date and time over a GPS signal
- Works in conjunction with Weather Unit WZ/S1.3.1.2
Benefits
- Provides a single ABB Weather Sensor Basic reference for detecting wind speed, rain, brightness, twilight, temperature, day/night, and GPS-based date and time.
- Supports brightness detection in up to 4 directions, depending on the Weather Unit used in the project.
- Works together with ABB Weather Unit WZ/S1.3.1.2, helping consultants and integrators specify the related weather-sensing components clearly in the BOQ.
- Designed for mast mounting, giving installers a defined mounting approach from the product data.
- Wall installation can be planned separately by ordering the required WB/Z1.1.1 wall mounting adapter.
- Exact identification by brand and SKU, ABB WES/A4.1.1, helps procurement teams avoid wrong orders in KNX sensor packages.
Technical Specifications
Applications
- KNX projects that require outdoor detection of wind speed, rain, brightness, twilight, temperature, day/night, and GPS date/time values.
- Specifications where ABB WES/A4.1.1 is listed together with Weather Unit WZ/S1.3.1.2.
- Mast-mounted weather sensing installations based on the product mounting note.
- Projects where wall installation is required and the separate WB/Z1.1.1 wall mounting adapter is included in procurement planning.
Installation Notes
- The device is designed for mast mounting.
- For wall installation, the wall mounting adapter WB/Z1.1.1 is required and must be ordered separately.
- The Weather Sensor Basic works in conjunction with the Weather Unit WZ/S1.3.1.2; verify that the required Weather Unit is included in the project scope.
- Before ordering, match the BOQ line item exactly to ABB WES/A4.1.1 and check the official ABB manufacturer documentation for project-specific installation requirements.
- Do not substitute accessories or related devices without confirming the exact model references in the official documentation.
Developer Resources
- ABB manufacturer product page: https://new.abb.com/products/2CDG120091R0011/wes-a4-1-1
- KNXbazzar ABB brand page: https://knxbazzar.com/knxshop/?brand=abb
- KNX Sensors category page: https://knxbazzar.com/product-category/knx-sensors/
- KNXbazzar home: https://knxbazzar.com
- Dealer enquiry page: https://knxbazzar.com/be-a-dealer/
FAQ
What does ABB WES/A4.1.1 detect?
The product data states that it detects wind speed, rain, brightness in up to 4 directions depending on the Weather Unit, twilight, temperature, day/night, and date and time over a GPS signal. Explore more products from ABB for professional building automation projects.
Does ABB WES/A4.1.1 work as a standalone weather unit?
The product data states that the Weather Sensor Basic works in conjunction with the Weather Unit WZ/S1.3.1.2. For certificates and current technical files, refer to the manufacturer technical documentation.
How is ABB WES/A4.1.1 mounted?
The device is designed for mast mounting. For wall installation, the wall mounting adapter WB/Z1.1.1 is required and must be ordered separately.
Is brightness detection always available in 4 directions?
The product data states brightness detection is available in up to 4 directions, depending on the Weather Unit.
What should buyers verify before placing an order?
Buyers should verify the exact ABB model and SKU WES/A4.1.1, confirm the required Weather Unit WZ/S1.3.1.2, check whether the WB/Z1.1.1 wall mounting adapter is needed, and review the official ABB product documentation.
What is the exact product model?
The order/model code for this page is WES/A4.1.1. Match it against project documents before purchase.
Conclusion
ABB WES/A4.1.1 Weather Sensor Basic is a KNX Sensors category product for detecting wind speed, rain, brightness, twilight, temperature, day/night, and GPS-based date and time, while working with Weather Unit WZ/S1.3.1.2. Installers and system integrators can review our become a KNX dealer options.
For accurate procurement, specify the exact ABB model WES/A4.1.1, verify official documentation, and add the separately ordered WB/Z1.1.1 adapter when wall installation is required.








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