ISO 16484-2:2025

Overview - ISO 16484-2:2025 (Building automation and control systems - Part 2: Hardware)

ISO 16484-2:2025 defines the hardware requirements for building automation and control systems (BACS). It applies to physical devices across a building network infrastructure - from management stations and operator panels to edge/cloud servers, automation stations, sensors and actuators. The standard provides a generic system topology that covers devices both inside and outside the building envelope and aligns hardware requirements with network, security and human-interaction considerations.

Key topics and technical requirements

The standard addresses hardware-related topics essential to reliable, secure BACS deployment:

• BACS components and performance criteria (Clause 5) - hardware component categories, system configuration and basic hardware performance expectations.
• Building management devices - requirements for management stations, operating units, and devices for data processing, storage and archiving (edge and cloud servers).
• Control devices and automation stations (Clause 5.3) - roles and tasks of edge devices and automation stations for control applications.
• Sensors, actuators and I/O - requirements for physical quantities acquisition, analogue/binary I/O and counter inputs.
• Data interface unit (DIU) - use and function of DIUs (e.g., routers/gateways) to connect BACS to other networks.
• Topology and communications (Clause 6) - generic building network infrastructure, system communication, wired and wireless networks.
• Cybersecurity and data security - hardware considerations that support IEC 62443-based system security measures and secure data handling.
• Human interaction and local override - requirements for devices that require human interaction (management stations, operator panels, local override devices).
• Environmental and installation considerations - cabling, enclosures and protection levels (normative references include IEC 60529 for IP code).

Practical applications and who uses this standard

ISO 16484-2 is intended for professionals involved in the design, manufacture, integration and operation of building automation hardware:

• Hardware manufacturers and device designers creating sensors, actuators, automation stations, edge/cloud interfaces and operator panels
• System integrators and installers specifying device selection, cabling and DIUs in building network infrastructures
• Building owners, facility managers and operators procuring compliant BACS hardware for energy-efficient, safe building operations
• IT and cybersecurity teams aligning BACS hardware with network security (IEC 62443) and data protection strategies
• Consultants and standards authors referencing unified hardware requirements for project specifications and tenders

Related standards

• IEC 60529 (Degrees of protection - IP code)
• IEC 62443 series (Industrial communication networks - system security)
• ISO 52120-1 (Building automation terminology and related concepts)

Keywords: ISO 16484-2, building automation and control systems, BACS hardware, building network infrastructure, sensors and actuators, automation station, edge servers, data interface unit, DIU, cybersecurity.