Overview
EN ISO 16484-2:2025 - Building automation and control systems (BACS) Part 2: Hardware specifies the hardware requirements needed to perform building automation tasks. Published by CEN/ISO in 2025, this updated edition replaces the 2004 version and defines requirements for physical devices across building automation ecosystems. It provides a generic system topology based on a building network infrastructure that covers devices both inside and outside the building envelope.
Key topics and technical requirements
- Scope of hardware: applies to management stations and operator panels, edge and cloud servers, automation stations, and sensors & actuators.
- BACS features catalogue: classification of hardware components, system configuration and basic hardware performance criteria.
- Device classes: requirements and tasks for control devices (automation stations, edge devices), room controllers, local override/indication units, and data storage/processing units.
- System topology: generic network layout for devices inside/outside the building envelope, and guidance on communications architecture.
- Communication & security: sections on system communication, cyber security, data security, human interaction, storage and analysis, cloud-to-cloud and wireless communications.
- Normative references: aligns with IEC standards such as IEC 60529 (IP code) and IEC 62443 series for industrial and system security considerations.
- Terminology & classification: updated terms, definitions and abbreviated terms relevant to building automation hardware.
Practical applications
EN ISO 16484-2:2025 is practical for:
- Manufacturers designing BACS hardware (automation stations, sensors, actuators, operator panels).
- System integrators and installers specifying compliant hardware and defining network topology.
- Facility managers and building owners ensuring devices meet performance and security expectations for operations, monitoring and data storage.
- Specifiers and consultants writing procurement documents, tender specifications or interoperability requirements.
- IT and cybersecurity teams integrating building systems with enterprise networks and cloud services while following IEC 62443 guidance.
Related standards
- IEC 60529 - Degrees of protection (IP code)
- IEC/TR 62443-3-1 and IEC 62443-3-3 - Industrial communication networks and system security requirements
- Other parts of the ISO 16484 series addressing protocols, applications and system integration
EN ISO 16484-2:2025 is essential for anyone involved in building automation hardware design, procurement and secure deployment - ensuring interoperable, robust and secure BACS hardware across modern buildings. Keywords: EN ISO 16484-2:2025, BACS hardware, building automation hardware, automation stations, edge servers, sensors and actuators, system topology, cybersecurity for BACS.
