The WES/A 3.1 is a professional-grade component of the ABB i-bus® KNX smart building ecosystem, engineered to deliver exceptional reliability, energy efficiency, and operational scalability for modern intelligent infrastructure. As part of the globally recognized Weather & Environmental series, this device represents the convergence of high-performance hardware design and flexible software logic, ensuring seamless coordination across diverse building services including lighting, HVAC, and system maintenance.

Designed for DIN-rail or decentralized installation, the WES/A 3.1 facilitates modular system architecture, allowing building operators to optimize environmental parameters and reduce energy overhead. Built with sustainable materials and future-ready technology, this device is a critical building block for achieving high-performance infrastructure standards such as LEED, BREEAM, and Green Premium. It is specifically engineered for 24/7 mission-critical operations in high-end commercial, hospitality, and residential environments.

• Product ModelWES/A 3.1
• Product RangeABB i-bus® KNX System
• Communication ProtocolStandard KNX TP1 (S-Mode / PL-Link compatible)
• Interface ConfigurationIntegrated multi-sensor head for environmental data
• Rated Operating VoltagePowered via Weather Unit WZ/S (DC 24V supply)
• Power SupplyBus-powered via KNX line (DC 24-30 V SELV) or external auxiliary supply
• Functional Sensing ElementsHeated rain sensor element, Multi-directional brightness measurement
• Network Topology SupportSupports star, daisy-chain, and branch-based bus architectures
• Wiring InterfaceMaintenance-free PUSH-IN or industrial screw terminals
• Operating Temperature-5°C to +45°C (typical indoor operational range)
• Housing MaterialHalogen-free, Flame-retardant industrial grade polycarbonate
• Ingress ProtectionIP20 (Indoor installation environments)
• CertificationsCE Marked, RoHS, REACH, KNX Certified, BTL Listed, Green Premium