SIST EN ISO 16484-2:2025

SLOVENSKI STANDARD
01-april-2025
Sistemi za avtomatizacijo in nadzor stavb - 2. del: Strojna oprema (ISO 16484-
2:2025)
Building automation and control systems (BACS) - Part 2: Hardware (ISO 16484-2:2025)
Systeme der Gebäudeautomation - Teil 2: Hardware (ISO 16484-2:2025)
Systèmes d’automatisation et de contrôle des bâtiments (BACS) - Partie 2: Matériel (ISO
16484-2:2025)
Ta slovenski standard je istoveten z: EN ISO 16484-2:2025
ICS:
91.140.01 Napeljave v stavbah na Installations in buildings in
splošno general
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 16484-2
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 91.040.01; 35.240.67 Supersedes EN ISO 16484-2:2004
English Version
Building automation and control systems (BACS) - Part 2:
Hardware (ISO 16484-2:2025)
Systèmes d'automatisation et de contrôle des Systeme der Gebäudeautomation - Teil 2: Hardware
bâtiments (BACS) - Partie 2: Matériel (ISO 16484- (ISO 16484-2:2025)
2:2025)
This European Standard was approved by CEN on 20 January 2025.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16484-2:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 16484-2:2025) has been prepared by Technical Committee ISO/TC 205
"Building environment design" in collaboration with Technical Committee CEN/TC 247 “Building
Automation, Controls and Building Management” the secretariat of which is held by SNV.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2025, and conflicting national standards shall
be withdrawn at the latest by August 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 16484-2:2004.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 16484-2:2025 has been approved by CEN as EN ISO 16484-2:2025 without any
modification.
International
Standard
ISO 16484-2
Second edition
Building automation and control
2025-01
systems (BACS) —
Part 2:
Hardware
Systèmes d’automatisation et de contrôle des bâtiments
(BACS) —
Partie 2: Matériel
Reference number
ISO 16484-2:2025(en) © ISO 2025

ISO 16484-2:2025(en)
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 16484-2:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 6
5 BACS features catalogue . 7
5.1 BACS components .7
5.1.1 Hardware components .7
5.1.2 System configuration .7
5.1.3 Basic hardware performance criteria .7
5.2 Building management .8
5.2.1 General .8
5.2.2 Devices for data processing, storage and archiving .8
5.2.3 Management stations and operating units .9
5.2.4 Data interface unit (DIU) .9
5.3 Control devices .9
5.3.1 General .9
5.3.2 Edge device — Tasks.9
5.3.3 Automation station.10
5.4 Sensors and actuators .11
5.5 Local override/indication device — Task and use . 12
5.6 Room control device . 12
6 Topology . .12
6.1 Topology . 12
6.2 System communication . 12
6.2.1 General . 12
6.2.2 Cyber security . 13
6.2.3 Data security . 13
6.2.4 Human interaction . 13
6.2.5 Storage and analysis of data. 13
6.2.6 Cloud to cloud communication .14
6.2.7 Wireless networks .14
Bibliography .15

iii
ISO 16484-2:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 205, Building environment design, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 247,
Building Automation, Controls and Building Management, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 16484-2:2004), which has been technically
revised.
The main changes are as follows:
— overall structure of document has been updated;
— Clause 1, Clause 2 and Clause 3 have been revised;
— technical content throughout the document has been modified and updated.
A list of all parts in the ISO 16484 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
International Standard ISO 16484-2:2025(en)
Building automation and control systems (BACS) —
Part 2:
Hardware
1 Scope
This document specifies the hardware requirements needed to carry out building automation tasks.
This document is applicable to physical devices, i.e.:
— devices that require human interaction, such as management stations or operator panels;
— devices for data storage and analysis, such as edge or cloud servers;
— devices for control applications, such as automation stations;
— devices for physical quantities acquisition, such as sensors and actuators.
This document provides a generic system topology based on a building network infrastructure, which
includes both the devices inside the building envelope and those outside the building envelope.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
IEC 60529, Degrees of protection provided by enclosures (IP code)
IEC/TR 62443-3-1, Industrial communication networks — Network and system security — Part 3-1: Security
technologies for industrial automation and control systems
IEC 62443-3-3, Industrial communication networks — Network and system security — Part 3-3: System security
requirements and security levels
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
access control system
dedicated security system, that includes the automatic checking of access rights under organizational
measures, barrier and door control for buildings and rooms, and registration of events
3.2
alarm
warning given by the system either:

ISO 16484-2:2025(en)
a) indicating the presence of a hazard to property, the environment, or to life
b) a condition detected by a device or controller regarded as abnormal, that implements a rule or logic
specifically designed to look for that condition, e.g. "frost alarm"
Note 1 to entry: An alarm can be an annunciation that is either audible, visual or both that alerts an operator to an
abnormal condition, which can require corrective action.
3.3
analogue input
part of the hardware pertaining to a control device for measuring
3.4
analogue output
part of the hardware pertaining to a control device for positioning
3.5
application
set of user information processing requirements or functions that together form a logical unit supporting
a process
Note 1 to entry: A building automation and control system can support many different applications.
3.6
binary input
hardware pertaining to control devices for state processing
Note 1 to entry: The function is also referred to as binary input state.
3.7
binary output
hardware pertaining to control devices for switching
Note 1 to entry: The function is also referred to as output switching.
3.8
building
large volume separate fixed structures, i.e. commercial or residential premises, however excluding industrial
structures
Note 1 to entry: Building automation and control system can also be employed for other structures, such as houses,
tunnels, railways, and ships.
3.9
building automation and control system
system, comprising all products, software and engineering services for automatic controls (including
interlocks), monitoring, optimization, operation, human intervention, and management to achieve energy-
efficient, economical, and safe operation of building services
Note 1 to entry: The trade designation and the industry branch are also referred to as either building automation or
building control, or both.
[SOURCE: ISO 52120-1:2021, 3.2, modified — Note 1 has been added.]
Note 2 to entry: Building automation and control system (BACS) is also referred to as building management system
(BMS), of which building energy management is part.
Note 3 to entry: The use of the word "control" does not imply that either the system or the device or both are restricted
to control functions. Processing of data and information is also possible.
Note 4 to entry: If a building automation and control system, or building energy management system, conforms to the
requirements of the ISO 16484 series, it may be designated as a BACS.

ISO 16484-2:2025(en)
Note 5 to entry: Building services are divided into technical, infrastructural and financial building services and energy
management is part of technical building management.
3.10
building management
totality of services involved in the management, operation and monitoring of buildings (including plants and
installations)
Note 1 to entry: Building management is divided into technical building management, infrastructural building
management and commercial building management and has interfaces to area and facility management.
[SOURCE: ISO 52120-1:2021, 3.4, modified — Note 1 has been added.]
3.11
building network infrastructure
communication infrastructure next to the traditional electrical and sanitary installations in modern
buildings
Note 1 to entry: The network is optimally set up for the needs of the building and its use and ensures that cyber
security needs are met, taking IEC 62443 series into consideration.
3.12
building services
utilities and installations supplied and distributed within a building, such as electricity, gas, heating, water,
waste, and communications
3.13
cabling
system of cables and connecting hardware that supports the wired connection of the building automation
and control system and other equipment
3.14
cloud
servers located in data centres all over the world that are accessed over the internet, as well as the software
and databases that run on those servers
Note 1 to entry: By using cloud computing, users and companies do not need to manage physical servers themselves or
run software applications on their own machines.
3.15
communication
act of conveying meaning from one entity or group to another through the use of mutually understood signs,
symbols, and semiotic rules
3.16
communication interface
physical and electrical requirements for the connection of components of communicating products
3.17
configuration
site-specific information related to physical and functional units, entered during system engineering
resulting in the system configuration
Note 1 to entry: Generally, the configuration does not change once the system is functioning.
3.18
controller
automation station
device for either regulation or logic control, or both, as well as the monitoring and processing of information
such as temperature, humidity and pressure
Note 1 to entry: The use of the words "automation" and "control" does not imply that the device or system is restricted
to control functions only. Monitoring and processing of other information is possible.

ISO 16484-2:2025(en)
Note 2 to entry: In IT, a device that controls the transfer of data between a computer and a peripheral device is also
referred to as a controller.
3.19
counter input
hardware pertaining to a control device for pulse counting
3.20
data
representation of information in a formalized manner suitable for human or automatic processing
Note 1 to entry: Processing includes communication and interpretation.
3.21
data interface unit
functional or physical unit for communication between the devices of a BACS, as well as devices and systems
in other networks
Note 1 to entry: Different types of DIUs can exist, such as routers or gateways.
Note 2 to entry: A DIU may be used to conform to the relevant national standards if connected via public data networks.
3.22
data-point
input and output function consisting of all assigned information describing the point's meaning entirely
Note 1 to entry: There are physical and virtual data-points. A physical data-point is related to a direct or remotely
connected input/output device. A virtual data-point can be derived from the result of a processing function, or is
related to another device as a shared data-point.
Note 2 to entry: Historically, the term "data-point" described only a physical value or state.
Note 3 to entry: A collection of virtual data-points is usually identified as the digital twin of the controller owning
...