SIST EN 50518:2019

SLOVENSKI STANDARD
01-november-2019
Nadomešča:
SIST EN 50518-1:2013
SIST EN 50518-2:2013
SIST EN 50518-3:2013
Nadzorni in sprejemni centri za alarme
Monitoring and alarm receiving centre
Alarmempfangsstelle
Centre de contrôle et de réception d’alarme
Ta slovenski standard je istoveten z: EN 50518:2019
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50518
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2019
ICS 13.320 Supersedes EN 50518-1:2013, EN 50518-2:2013, EN
50518-3:2013 and all of its amendments and corrigenda (if
any)
English Version
Monitoring and Alarm Receiving Centre
Centre de contrôle et de réception d'alarme Alarmempfangsstelle
This European Standard was approved by CENELEC on 2019-02-06. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50518:2019 E
Contents Page
European foreword . 6
Introduction . 7
1 Scope . 8
2 Normative references . 9
3 Terms, definitions and abbreviations .10
3.1 Terms and definitions . 10
3.2 Abbreviations . 14
4 Planning .15
4.1 Categorization . 15
4.2 Site selection . 15
5 Construction – ARC structure .15
5.1 General . 15
5.2 Walls, floor and ceiling – resistance against physical attack . 15
5.2.1 Category I . 15
5.2.2 Category II . 16
5.3 Perimeter doorsets – resistance against physical attack and bullet attack . 16
5.4 Glazed areas . 16
5.4.1 Category I . 16
5.4.2 Category II . 16
5.5 Resistance against fire and smoke . 16
5.6 Protection against the effect of lightning . 16
5.7 Openings . 16
5.7.1 General . 16
5.7.2 Entrance to the ARC . 17
5.7.3 Emergency entry . 17
5.7.4 Emergency exit(s) . 17
5.7.5 Ventilation . 17
5.7.6 Service inlets and outlets . 18
5.7.7 Transfer hatch / chute . 18
5.8 Location of data processing equipment . 18
5.8.1 Category I . 18
5.8.2 Category II . 19
5.9 Communication cables . 20
5.9.1 Category I . 20
5.9.2 Category II . 20
5.10 Facilities . 20
5.10.1 Category I . 20
5.10.2 Category II . 20
6 Alarm systems of the ARC .20
6.1 Category I . 20
6.1.1 General . 20
6.1.2 External attack . 21
6.1.3 Glazed areas . 21
6.1.4 Fire . 21
6.1.5 Entry / exit . 21
6.1.6 Gas . 21
6.1.7 Hold-up . 21
6.1.8 Safety monitoring . 21
6.1.9 Messages from the ARC alarm systems . 22
6.1.10 Video surveillance system. 22
6.2 Category II . 22
7 Electrical power supplies .22
7.1 Mains supply . 22
7.2 Standby power supplies . 22
7.2.1 General . 22
7.2.2 UPS . 22
7.2.3 Standby generators . 23
8 Alarm Management System .23
8.1 General . 23
8.2 Time synchronization of equipment . 25
8.3 Recording and logging of events . 25
8.4 Storage of master data . 25
9 Operation of the ARC .26
9.1 Procedures – General . 26
9.1.1 General . 26
9.1.2 Creation, modification and cancellation of services or customer accounts . 26
9.1.3 Message handling. 26
9.1.4 Communication with response services . 26
9.1.5 Individual services provided by the ARC . 26
9.1.6 Alarm verification . 26
9.1.7 Unexpected increase in alarm signals. 26
9.1.8 Alarm transmission path failures . 26
9.1.9 Controls to maintain quality of service . 27
9.1.10 Installation, maintenance, protection, removal and reuse of assets under the control
of the ARC . 27
9.1.11 Monitoring and testing of equipment . 27
9.1.12 Fault procedures and reporting . 27
9.1.13 Information management . 28
9.1.14 Data back-up . 28
9.1.15 Confidentiality and classification of information . 28
9.1.16 Relationships with essential suppliers . 28
9.1.17 Administrative procedures . 28
9.1.18 Physical access . 28
9.1.19 Remote access . 29
9.1.20 Operational continuity and emergencies . 29
9.1.21 Emergency evacuation and re-entry . 29
9.1.22 Emergency entry . 29
9.1.23 Key performance indicators . 29
9.2 Performance criteria – message handling . 29
10 General Principles, Leadership, Governance, Management, and Staffing .30
10.1 General . 30
10.2 Governance and Strategy . 30
10.3 Legal and operational set-up . 30
10.4 Management System . 30
10.5 Staffing . 32
10.5.1 General . 32
10.5.2 Security screening and vetting . 32
10.5.3 Training. 32
Annex A (informative) Typical ARC layout category I .33
Annex B (informative) Security and technical implications of remote access to ARC data .34
B.1 General .34
B.2 Levels of access .34
B.3 Access to the system .34
B.4 Authorization for facilities .34
B.4.1 General .34
B.4.2 View only .34
B.4.3 Edit .35
B.4.4 Creation of a new record .35
B.4.5 Confirmation of changes made .35
B.5 Placing a system on test .35
B.6 Password management .35
Annex C (informative) Alarm management system requirements .36
C.1 Structure of an AMS .36
C.1.1 General .36
C.1.2 Interface for interconnection with RCT (I ) .37
RCT
C.1.3 Interconnection with other AMS’s (joining module) .37
C.1.4 Communication module.37
C.1.5 Information module .37
C.1.6 User Interface .37
C.2 Faults .37
C.2.1 General .37
C.2.2 Fault detection .37
C.2.3 Avoiding faults in manual data entries .37
C.2.4 Presentation of fault information .37
C.3 Message .38
C.3.1 Message acknowledgement .38
C.3.2 Alarm messages .38
C.3.3 Fault messages .38
C.3.4 Expected messages .38
C.3.5 Other received messages .38
C.3.6 Message queue .38
C.3.7 Input priorities .39
C.3.8 Alert indication .39
C.3.9 Message acceptance .39
C.4 Information to be presented .39
C.4.1 Information to be presented relating to messages .39
C.4.2 Information to be presented relating to fault information received from alarm systems 40
C.4.3 Failure of the means of presentation of information .40
C.5 Logging .40
C.5.1 General .40
C.5.2 Time stamps for logging .40
C.5.3 Master data log (Log M1) .41
C.5.4 Event log’s .41
C.5.5 Access levels .42
C.5.6 Access to database .42
C.5.7 Access to alarm management system .42
C.5.8 Access to alarm management system configuration data .42
C.5.9 Access to log data .42
C.6 Monitoring of interconnection with the receiving centre transceiver .43
Bibliography .44

European foreword
This document (EN 50518:2019) has been prepared by CLC/TC 79, “Alarm systems”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2020-02-06
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2022-02-06
conflicting with this document have to

be withdrawn
This documents supersedes EN 50518-1:2013, EN 50518-2:2013 and EN 50518-3:2013.
EN 50518:2017 includes the following significant technical changes with respect to EN 50518-1:2013,
EN 50518-2:2013 and EN 50518-3:2013:
— referenced based standards were updated to the latest versions;
— definitions were updated;
— the scope was extended to include fire, access, CCTV, social alarms and other alarms;
— two categories ARC’s are described, category I and category II. A category I ARC will be
designed, constructed and operated to a higher standard with respect to construction, security
and integrity than a category II ARC;
— a chapter was added which describes the management tools that shall be in place in the ARC;
— an informative annex was added which describes security and technical implications of remote
access to ARC data;
— an informative annex was added which describes requirements for an alarm management
system.
This revision was prepared to bring the procedures up-to-date with current technical developments,
taking account of changes in the basic standards and the experience gained in the use of the
standard.
Introduction
This European Standard applies to all Monitoring and Alarm Receiving Centres (MARC’s) that monitor
and/or receive and/or process (alarm) messages that require an emergency response.
The abbreviation MARC describes the full functional scope of a Monitoring and Alarm Receiving
centre. In all existing EN 50131 series under CLC/TC 79, “Alarm systems”, the abbreviation ARC is
used. To avoid confusion and to achieve consistency in terminology the abbreviation ARC will be used
throughout this standard, where MARC is equivalent to ARC.
The function of receiving, processing and initiating response actions by (human or non-human)
intervention is not limited to only those messages as generated by Intruder and Hold-up Alarm
Systems (I&HAS). The whole series of standards under CLC/TC 79, “Alarm systems”, encompasses
video surveillance systems (EN 62676), social alarm systems (EN 50134), access control systems
(EN 60839-11) and audio and video door entry systems. All of these systems can send information,
including alarms, to one or more ARC’s for further processing, evaluation and intervention.
Alarm information generated by other systems such as fire detection and fire alarm systems, (vehicle)
tracking and tracing systems, man guarding or telecommunication network supervision is regularly
transmitted to one or more ARC’s for further processing, evaluation and intervention.
In all of these circumstances, criminal action and/or emergency situations can jeopardize the safety
and security of people and/or properties. The central locations where the receiving, processing and
initiation of intervention take place should comply with the requirements of this standard.
Figure 1 shows the chain of events of the total alarm process.

Figure 1 — Chain diagram of the total alarm process
It is noted that this European Standard cannot supersede any legislative requirements deemed
necessary by a National Government to control the security sector on a national basis. This standard
cannot interfere with all those items that are regulated by (inter)national regulations concerning
external services (for example water, waste water, fuel supplies for gas and/or oil and mains power
supplies).
1 Scope
This document specifies the minimum requirements for monitoring, receiving and processing of alarm
messages generated by alarm systems taking place as a part of the total fire, safety and security
solution.
For the purpose of this document, the term “alarm” is used in the broad sense to include fault, status
and other messages received from one or more of a range of safety and security alarm systems such
as but not limited to fire detection and fire alarm systems, fixed firefighting systems, intrusion and hold-
up alarm systems, access control systems, video surveillance systems, social alarms systems and
combinations of such systems.
This document gives requirements for two categories of ARC, category I and category II. A category I
ARC will be designed, constructed and operated to a higher standard with respect to construction,
security and integrity than a category II ARC.
The categorization is determined according to the type(s) of alarm messages handled.
Category I: ARCs handling messages from security applications:
— I&HAS’s;
— access control systems;
— VSS in security applications that require an emergency response (for example loss prevention);
— people monitoring, lone workers and object tracking systems for security applications;
— alarm messages handled by category II ARCs;
— combinations of the above systems.
Category II: ARC’s handling messages from non-security applications:
— fire alarm systems;
— fixed firefighting systems;
— social alarm systems;
— audio/video door entry systems;
— VSS in non-security applications (for example traffic flow);
— people monitoring, lone workers and object tracking systems for non-security applications;
— lifts emergency systems;
— combinations of the above systems.
The requirements apply to ARC’s (whether established in single or multiple sites) monitoring and
processing alarms generated by systems installed at other locations and also to ARC’s monitoring
solely alarms from systems within their own site.
The document includes functional and specific requirements supporting the services of an ARC.
The document does NOT apply to:
— alarm systems used for non-civil purposes;
— alarm systems for medical or health applications.
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.
EN 54 (series), Fire detection and fire alarm systems
EN 179, Building hardware — Emergency exit devices operated by a lever handle or push pad, for use
on escape routes — Requirements and test methods
EN 356, Glass in building — Security glazing — Testing and classification of resistance against
manual attack
EN 1063, Glass in building — Security glazing — Testing and classification of resistance against bullet
attack
EN 1125, Building hardware — Panic exit devices operated by a horizontal bar, for use on escape
routes — Requirements and test methods
EN 1522, Windows, doors, shutters and blinds — Bullet resistance — Requirements and classification
EN 1627, Pedestrian doorsets, windows, curtain walling, grilles and shutters — Burglar resistance —
Requirements and classification
EN 13501-2, Fire classification of construction products and building elements — Part 2: Classification
using data from fire resistance tests, excluding ventilation services
EN 13637, Building hardware — Electrically controlled exit systems for use on escape routes —
Requirements and test methods
EN 14846, Building hardware — Locks and latches — Electromechanically operated locks and striking
plates - Requirements and test methods
EN 15713, Secure destruction of confidential material — Code of practice
EN 50131-1, Alarm systems — Intrusion and hold-up systems — Part 1: System requirements
EN 50134-7, Alarm systems — Social alarm systems — Part 7: Application guidelines
EN 50136-1, Alarm systems — Alarm transmission systems and equipment — Part 1: General
requirements for alarm transmission systems
EN 50136-3, Alarm systems — Alarm transmission systems and equipment — Part 3: Requirements
for Receiving Centre Transceiver (RCT)
EN 50272-2, Safety requirements for secondary batteries and battery installations — Part 2:
Stationary batteries
EN 50600 (series), Information technology — Data centre facilities and infrastructures
EN 62040-1, Uninterruptible power systems (UPS) — Part 1: General and safety requirements for
UPS (IEC 62040-1)
EN 62305-2, Protection against lightning — Part 2: Risk management
EN 62676-4, Video surveillance systems for use in security applications — Part 4: Application
guidelines
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain
terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
alarm company
organization which provides services for AS
[SOURCE: EN 50131-1:2006, 3.1.7, modified]
3.1.2
alarm condition
condition of an AS, or part thereof, which results from the response of the system to the presence of a
hazard
[SOURCE: EN 50131-1:2006, 3.1.8, modified]
3.1.3
alarm handling delay
procedure whereby signalled alarm conditions are intentionally delayed at the ARC and their status
reviewed for the purpose of preventing unnecessary calls to the relevant response service by
cancelling certain alarm conditions, where such cancellation is authorized by the user at the
supervised premises
3.1.4
alarm management system
AMS
system which stores, organises, controls, manages and allows retrieval of client data and is interfaced
to alarm receiving equipment for automatic annunciation of messages for each alarm system
3.1.5
alarm receiving centre
ARC
continuously manned centre to which information concerning the status of one or more AS is reported
[SOURCE: EN 50136-1:2012, 4.1.2]
3.1.6
alarm receiving centre operator
ARC operator
person responsible for the handling of messages presented at the AMS
[SOURCE: CLC/TS 50136-4:2004, 3.3 modified]
3.1.7
alarm receiving centre shell
ARC shell
all structural elements of the ARC perimeter (walls, entrance lobby, windows, glazed areas, floors,
ceilings, entry and exit doors, entry and exits points of ventilation ducts, entry and exit points for other
service cables and ducts, transfer hatches/chutes)
3.1.8
alarm transmission equipment
ATE
collective term to describe SPT, MCT (monitoring centre transceiver) and RCT
[SOURCE: EN 50136-1:2012, 4.1.4]
3.1.9
alarm transmission system
ATS
ATE and networks used to transfer information concerned with the state of one or more ASs to the
AMS of one more ARC’s
Note 1 to entry: An ATS may consist of alarm transmission paths of different classes, for example for use in so
called “dual path systems”.
[SOURCE: EN 50136-1:2012, 4.1.8, modified]
3.1.10
alarm verification
process to provide information additional to the notified alarm which increases the probability that a
genuine alarm has occurred
3.1.11
client
individual or corporate body with whom the ARC has entered into a contract to provide alarm
monitoring services
3.1.12
detector
device designed to generate an alarm message in response to the sensing of an abnormal condition
indicating the presence of a hazard
[SOURCE: CLC/TS 50131-7:2010, 3.1.12, modified]
3.1.13
disruptive event
any natural or man-made occurrence that may cause the discontinuation of orderly ARC activities
according to standard operating procedures and requires the execution of special procedures
Note 1 to entry: Such as (but not limited to):
— failure of power supply;
— failure of inbound communication systems;
— failure of outbound communication systems;
— failure of IT systems, loss of data;
— fire;
— extreme weather conditions, such as storm, flooding, lightning;
— natural disasters such as earthquakes or landslides;
— damage by vehicles from land and air;
— hazardous gases and reduction of oxygen levels in the ambient air;
— intrusion into premises, physical attack, including duress;
— intrusion into IT and communication systems, virtual attack and cyber crime;
— sabotage by people with access authorization (employees, business partners).
3.1.14
entrance lobby
space between exterior and ARC that provides a controlled and secure entry/exit to the ARC
3.1.15
expected message
message which has to reach the ARC according to predefined schedules (in particular status
messages from alarm systems and communication systems)
3.1.16
external communication
all inbound and outbound communication with the ARC
Note 1 to entry: Communication includes all information relevant for the functioning of the ARC such as phone,
email, fax, written information, audio, all VSS images and other electronic data but excludes alarm messages.
3.1.17
fire resistance
ability of an element of building construction, component or structure to fulfil, for a stated period of
time, the required stability, fire integrity and/or thermal insulation and/or other expected duty in a
standard fire resistance test
3.1.18
hold up device
device which, when manually operated, causes an alarm message to be generated
[SOURCE: EN 50131-1:2006, 3.1.29, modified]
3.1.19
intruder alarm system
AS to detect and indicate the presence, entry or attempted entry of an intruder into supervised
premises
[SOURCE: EN 50131-1:2006, 3.1.36]
3.1.20
installer
legal entity which installs systems
Note 1 to entry: May be part of the legal entity providing ARC services, may be affiliated with the legal entity
providing ARC services or may be an unrelated independent legal entity.
3.1.21
key performance indicator
KPI
business statistics which measure an organization’s performance
Note 1 to entry: KPIs show the progress (or lack of it) toward realizing the organization's objectives or strategic
plans by monitoring activities which (if not properly performed) would likely cause degradation of the performance
of the ARC.
3.1.22
message
series of signals routed via interconnections which include identification, function data and the various
means for providing its own integrity, immunity and proper reception
[SOURCE: EN 50131-1:2006, 3.1.43]
3.1.23
notified alarm
alarm condition which has been passed to the ARC
3.1.24
receiving centre transceiver
RCT
equipment located at a secure location and has as a minimum the functionality to receive and deliver
alarm messages to the AMS
Note 1 to entry: The RCT may include management functions for the ATS.
[SOURCE: EN 50136-1:2012/A1:2018, 4.1.28]
3.1.25
relevant employment
employment which involves, or may involve, the acquisition of, or access to, information or equipment,
the improper use of which could involve the organization, any client of the organization or any third
party in a security risk
[SOURCE: EN 15602:2008, 2.2.3]
3.1.26
responder
organization or person which executes actions upon request by an ARC
3.1.27
security application
application(s) designed to detect a hazard which may cause harm or damage from criminal actions to
humans, property, objects or assets
3.1.28
security screening
process of checking history and background of employees and potential employees
[SOURCE: EN 15602:2008, 2.2.6]
3.1.29
security vetting
verification by the national authority of the judicial and criminal record of employees and potential
employees
[SOURCE: EN 15602:2008, 2.2.7]
3.1.30
standby power supply
energy source that is capable of supporting an ARC for extended periods
3.1.31
supervised premises
that part of a building and/or area in which a hazard may be detected by an alarm system
[SOURCE: EN 50131-1:2006, 3.1.66, modified]
3.1.32
time stamp
value, which assigns a unique time to an event
3.1.33
transfer hatch / chute
facility to transfer keys, documents or other objects
3.1.34
uninterruptible power system
UPS
combination of convertors, switches and energy storage devices (such as batteries), constituting a
power system for maintaining continuity of load power in case of input power failure
Note 1 to entry: Continuity of load power occurs when voltage and frequency are within rated steady-state and
transient tolerance bands and with distortion and interruptions within the limits specified for the load. Input power
failure occurs when voltage and frequency are outside rated steady-state and transient tolerance bands or with
distortion or interruptions outside the limits specified for the UPS.
[SOURCE: EN 62040-1:2008, 3.1.1]
3.1.35
user
person authorized by the client to operate a(n) (alarm) system
[SOURCE: EN 50131-1:2006, 3.1.80, modified]
3.2 Abbreviations
For the purposes of this document, the following abbreviations apply.
AMS Alarm management system
ARC Alarm receiving centre
AS Alarm system
ATE Alarm transmission equipment
ATP Alarm transmission path
ATS Alarm transmission system
I&HAS Intruder and hold-up alarm system
KPI Key performance indicator
RCT Receiving centre transceiver
SOP Standard operating procedure
SPT Supervised premises transceiver
UPS Uninterruptible power system
UTC Coordinated Universal time
VSS Video surveillance system (formerly called CCTV)
4 Planning
4.1 Categorization
The planning for the construction of an ARC should be determined by the intended categorization.
ARC’s are categorized according to the type(s) of alarm messages handled and the consequent
requirements for integrity and security of construction, communications, operation and information.
This standard gives recommendations for two categories of ARC as described in the scope.
Unless otherwise stated the requirements in this standard apply to both category I and category II
ARC’s’.
4.2 Site selection
A documented risk assessment shall be completed which shall include the location of the ARC.
The ARC shall be located on a site taking account of risks of fire, explosion, flooding, vandalism and
exposure to hazards from other sites. Where the ARC does not occupy all the building in which it is
located, it shall be separated from the rest of the building by a physical boundary consisting of walls,
floors, ceilings and essential openings.
5 Construction – ARC structure
5.1 General
All structural elements described in Clause 5 refer to the ARC shell (see 3.1.7 and Annex A).
5.2 Walls, floor and ceiling – resistance against physical attack
5.2.1 Category I
The ARC shell is intended to provide equivalent protection for all structural elements of the ARC. They
shall provide resistance against physical attack in compliance with Table 1.
Table 1 — Minimum resistance against physical attack for ARC shell
Construction Materials Thickness
elements
Walls of the shell of Solid masonry ≥ 200 mm
the ARC
Cast concrete ≥ 150 mm
and the walls of the
Reinforced concrete ≥ 100 mm
entrance
lobby (see Annex A) Solid steel ≥ 8 mm
Internal walls No requirement No requirement
Floors and ceilings Cast concrete ≥ 150 mm
Reinforced concrete ≥ 100 mm
a
Solid steel ≥ 8 mm
Where the ARC is located on an upper floor > 4 m above ground or any
adjacent standing plane the wall thickness may be reduced by 50 %.
a
Thickness of steel may be reduced by 50 % where not directly accessible to
the general public.
The construction elements listed in Table 1 cover the minimum resistance against physical attack. If
other construction methods or material are applied it shall be demonstrable that the resistance against
physical and bullet attack is equal to that listed in Table 2.
5.2.2 Category II
The ARC shell shall consist of a physical barrier able to prevent unauthorised access, such as
provided by walls, doors, floor and ceiling.
5.3 Perimeter doorsets – resistance against physical attack and bullet attack
The resistance against physical attack and bullet attack of at least one of the entrance lobby doors
and all other perimeter doorsets shall be in compliance with Table 2.
Table 2 — Physical attack and bullet attack
Physical Attack Bullet Attack
Doorsets Category I EN 1627 resistance class 3 (RC3) EN 1522 classification FB3
Doorsets Category II EN 1627 resistance class 2 (RC2) No requirements

5.4 Glazed areas
5.4.1 Category I
Windows in the ARC shell shall be locked from the inside at all times except where an emergency exit
procedure has been initiated or for maintenance purposes and shall offer resistance to physical attack
and bullet attack as specified in Table 3.
Table 3 — Category I physical attack and bullet attack
Physical attack Bullet attack
Windows EN 1627 resistance class 3 (RC3) EN 1522 classification FB3
Glazing EN 356 classification P5A EN 1063 classification BR 3 – S

The interior of the ARC shall not be visible from outside of the ARC shell.
Wi
...