Alarm systems - Intrusion and hold-up systems - Part 2-4: Requirements for combined passive infrared and microwave detectors

This document is for combined passive infrared and microwave detectors installed in buildings and provides for security Grades 1 to 4 (see EN 50131-1), specific or non-specific wired or wire-free detectors, and uses environmental classes I to IV (see EN 50130-5). This document does not include requirements for detectors intended for use outdoors.
The purpose of the detector is to detect the broad spectrum infrared radiation emitted by an intruder, to emit microwave signals and analyse the signals that are returned and to provide the necessary range of signals or messages to be used by the rest of the intrusion alarm system.
For a combined detector where both technologies have to be activated in order to generate an alarm condition, providing higher false alarm immunity, it is essential to meet the grade dependent requirements of this document.
For a combined detector which can be configured or operated such that each detection technology can generate an alarm condition independently, it is essential to meet the grade-dependant requirements of EN 50131-2-2 and EN 50131-2-3 when configured accordingly. Otherwise the manufacturer clearly states that the detector does not comply to this document and not to EN 50131-2-2 and EN 50131-2-3 when put into such a configuration.
It is essential that a detector fulfil all the requirements of the specified grade.
Functions additional to the mandatory functions specified in this document can be included in the detector, providing they do not influence the correct operation of the mandatory functions.
This document does not apply to system interconnections.

Alarmanlagen - Einbruch- und Überfallmeldeanlagen - Teil 2-4: Anforderungen an Passiv-Infrarotdualmelder und Mikrowellenmelder

Systèmes d'alarme - Systèmes d'alarme contre l'intrusion et les hold-up - Partie 2-4: Exigences pour détecteurs combinés à infrarouges passifs et à hyperfréquences

Le présent document concerne les détecteurs à infrarouges passifs installés dans les immeubles et est prévu pour les grades de sécurité 1 à 4 (voir l’EN 50131-1), les détecteurs filaires ou non filaires spécifiques ou non spécifiques, et l'utilisation des classes d'environnement I à IV (voir l’EN 50130-5). Le présent document ne comprend pas d’exigences pour les détecteurs destinés à une utilisation extérieure.
Le but du détecteur est de détecter les rayonnements infrarouges émis par un intrus dans un spectre étendu, d’émettre des signaux en hyperfréquences et d’analyser les signaux renvoyés, ainsi que de fournir l’ensemble des signaux ou messages nécessaires à utiliser par le reste du système d’alarme intrusion.
Pour un détecteur combiné où les deux technologies doivent être activées en vue de générer une condition d’alarme, ce qui offre une immunité plus élevée aux fausses alarmes, il est essentiel de satisfaire aux exigences dépendantes du grade du présent document.
Pour un détecteur combiné qui peut être configuré pour fonctionner de telle sorte que chaque technologie de détection peut générer une condition d’alarme indépendamment, il est essentiel de satisfaire aux exigences dépendantes du grade de l’EN 50131-2-2 et de l’EN 50131-2-3 lorsqu’il est configuré en conséquence. Le cas contraire, le fabricant indique clairement que le détecteur n’est conforme ni au présent document, ni à l’EN 50131-2-2 et à l’EN 50131-2-3 lorsqu’il est mis dans une telle configuration.
Il est essentiel qu'un détecteur satisfasse à toutes les exigences du grade spécifié.
Des fonctions complémentaires aux fonctions obligatoires spécifiées dans le présent document peuvent être incluses dans le détecteur, sous réserve qu'elles n'influencent pas le bon fonctionnement des fonctions obligatoires.
Le présent document ne s'applique pas aux interconnexions entre systèmes.

Alarmni sistemi - Sistemi za javljanje vloma in ropa - 2-4. del: Zahteve za kombinirane pasivne infrardeče in mikrovalovne javljalnike

General Information

Status
Published
Public Enquiry End Date
26-Sep-2019
Publication Date
08-Sep-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
07-Sep-2020
Due Date
12-Nov-2020
Completion Date
09-Sep-2020

RELATIONS

Buy Standard

Standard
SIST EN 50131-2-4:2020
English language
54 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 50131-2-4:2020
01-oktober-2020
Nadomešča:
SIST EN 50131-2-4:2008
SIST EN 50131-2-4:2008/IS1:2014
Alarmni sistemi - Sistemi za javljanje vloma in ropa - 2-4. del: Zahteve za
kombinirane pasivne infrardeče in mikrovalovne javljalnike

Alarm systems - Intrusion and hold-up systems - Part 2-4: Requirements for combined

passive infrared and microwave detectors
Alarmanlagen - Einbruch- und Überfallmeldeanlagen - Teil 2-4: Anforderungen an
Passiv-Infrarotdualmelder und Mikrowellenmelder

Systèmes d'alarme - Systèmes d'alarme contre l'intrusion et les hold-up - Partie 2-4:

Exigences pour détecteurs combinés à infrarouges passifs et à hyperfréquences
Ta slovenski standard je istoveten z: EN 50131-2-4:2020
ICS:
13.310 Varstvo pred kriminalom Protection against crime
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
SIST EN 50131-2-4:2020 en,fr

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 50131-2-4:2020
---------------------- Page: 2 ----------------------
SIST EN 50131-2-4:2020
EUROPEAN STANDARD EN 50131-2-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2020
ICS 13.310 Supersedes EN 50131-2-4:2008, EN 50131-2-
4:2008/IS1:2014 and all of its amendments and corrigenda
(if any)
English Version
Alarm systems - Intrusion and hold-up systems - Part 2-4:
Requirements for combined passive infrared and microwave
detectors

Systèmes d'alarme - Systèmes d'alarme contre l'intrusion et Alarmanlagen - Einbruch- und Überfallmeldeanlagen - Teil

les hold-up - Partie 2-4: Exigences pour détecteurs 2-4: Anforderungen an Passiv-Infrarotdualmelder und

combinés à infrarouges passifs et à hyperfréquences Mikrowellenmelder

This European Standard was approved by CENELEC on 2020-06-30. 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

© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50131-2-4:2020 E
---------------------- Page: 3 ----------------------
SIST EN 50131-2-4:2020
EN 50131-2-4:2020 (E)
Contents Page

European foreword ................................................................................................................................. 4

Introduction ............................................................................................................................................. 6

1 Scope ................................................................................................................................................. 7

2 Normative references ....................................................................................................................... 7

3 Terms, definitions and abbreviations ............................................................................................ 8

3.1 Terms and definitions ................................................................................................................... 8

3.2 Abbreviations .............................................................................................................................. 9

4 Functional requirements ................................................................................................................. 9

4.1 Event Processing ......................................................................................................................... 9

4.2 Detection ....................................................................................................................................10

4.3 Operational requirements ..........................................................................................................12

4.4 Immunity of the individual technologies to incorrect operation ..................................................12

4.5 Tamper security .........................................................................................................................13

4.6 Electrical requirements ..............................................................................................................14

4.7 Environmental classification and conditions ..............................................................................14

5 Marking, identification and documentation .................................................................................15

5.1 Marking and/or identification ......................................................................................................15

5.2 Documentation ...........................................................................................................................15

6 Testing .............................................................................................................................................15

6.1 General ......................................................................................................................................15

6.2 General test conditions ..............................................................................................................16

6.3 Basic detection test ....................................................................................................................17

6.4 Walk testing ...............................................................................................................................18

6.5 Switch-on delay, time interval between signals and indication of detection ..............................22

6.6 Self-tests ....................................................................................................................................23

6.7 Immunity of individual technologies to incorrect operation ........................................................24

6.8 Tamper security .........................................................................................................................25

6.9 Electrical tests ............................................................................................................................28

6.10 Environmental classification and conditions ............................................................................29

6.11 Marking, identification and documentation ..............................................................................30

Annex A (normative) Dimensions & requirements of the standardised test magnets ................31

Annex B (normative) General testing matrix ....................................................................................34

Annex C (normative) Walk test diagrams .........................................................................................36

Annex D (normative) Procedure for calculation of the average temperature difference between

the standard target and the background ...........................................................................................44

---------------------- Page: 4 ----------------------
SIST EN 50131-2-4:2020
EN 50131-2-4:2020 (E)

Annex E (informative) Basic detection target for the basic test of detection capability .............45

Annex F (informative) Equipment for walk test velocity control ....................................................46

Annex G (informative) Immunity to visible and near Infrared radiation - Notes on calibration of

the light source .....................................................................................................................................47

Annex H (informative) Immunity to microwave signal interference by fluorescent lights ..........48

Annex I (informative) Example list of small tools ............................................................................49

Annex J (informative) Test for resistance to re-orientation of adjustable mountings .................50

Annex K (informative) Delta-T film adjustment Lookup table.........................................................52

Annex L (informative) Immunity to turbulent warm air flow fan heater setup ..............................53

Bibliography ..........................................................................................................................................54

---------------------- Page: 5 ----------------------
SIST EN 50131-2-4:2020
EN 50131-2-4:2020 (E)
European foreword

This document (EN 50131-2-4:2020) has been prepared by CLC/TC 79, “Alarm systems”.

The following dates are fixed:
• latest date by which this document has to be (dop) 2021-06-30
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2023-06-30
conflicting with this document have to be
withdrawn

This document supersedes EN 50131-2-4:2008 and all of its amendments and corrigenda (if any).

EN 50131-2-4:2020 includes the following significant technical changes with respect to

EN 50131-2-4:2008:
— editorial changes and refinement of wording;
— clarification to significant reduction of range requirements;

— clarification to the Electrical requirements section and certain environmental conditions;

— addition of requirements, tests and corresponding Annexes throughout the overall standard, to

support ceiling mounted detectors;
— improvement of the requirements of the supplied documentation;
— improvement of the standard conditions for testing;

— addition of chapter which defines the condition for the mounting height while the tests are

performed;
— refinement of the standard requirements for the Testing procedures;

— refinement of the Immunity to air flow test to allow for better repeatability of the test results;

— verifying and clarifying of the wording of the test for resistance to or detection of re-orientation of

adjustable mountings;

— updating of the test magnet specification for resistance to magnetic field interference;

— verifying and clarifying of the wording for the detection of detector masking in regards to the

conditions and the test material;

— review and optimization of the methods for temperature adjustments for the test environment;

— review of Sample Testmatrix;
— review and verifying of references to other standards.

EN 50131 consists of the following parts, under the general title Alarm systems - Intrusion and hold-up

systems:
— Part 1: System requirements
---------------------- Page: 6 ----------------------
SIST EN 50131-2-4:2020
EN 50131-2-4:2020 (E)
— Part 2–2: Intrusion detectors – Passive infrared detectors
— Part 2–3: Intrusion detectors – Microwave detectors

— Part 2–4: Intrusion detectors – Combined passive infrared / Microwave detectors

— Part 2–5: Intrusion detectors – Combined passive infrared / Ultrasonic detectors

— Part 2–6: Intrusion detectors – Opening contacts
— Part 2–7–1: Intrusion detectors – Glass break detectors – Acoustic
— Part 2–7–2: Intrusion detectors – Glass break detectors – Passive
— Part 2–7–3: Intrusion detectors – Glass break detectors – Active
— Part 3: Control and indicating equipment
— Part 4: Warning devices

— Part 5–3: Requirements for interconnections equipment using radio frequency techniques

— Part 6: Power supplies
— Part 7: Application guidelines
— Part 8: Security fog devices

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

---------------------- Page: 7 ----------------------
SIST EN 50131-2-4:2020
EN 50131-2-4:2020 (E)
Introduction

This document deals with combined passive infrared and microwave detectors (to be referred to as the

detector) used as part of intrusion alarm systems installed in buildings. It includes four security grades

and four environmental classes.

The purpose of the detector is to detect the broad spectrum infrared radiation emitted by an intruder, to

emit microwave signals and analyse the signals that are returned and to provide the necessary range

of signals or messages to be used by the rest of the intrusion alarm system.

The number and scope of these signals or messages will be more comprehensive for systems that are

specified at the higher grades.

This version of the standard contains limited requirements for Grade 4 detectors. Future revisions of the

standard are expected to include enhanced requirements for Grade 4 detectors.

This document is only concerned with the requirements and tests for the detector. Other types of

detector are covered by other documents identified as in the EN 50131-2 series.

NOTE Each country has certain regulations in regards to which part of the microwave spectrum is allowed to

be used in this application. This information can be found in ERC recommendation 70-03.

---------------------- Page: 8 ----------------------
SIST EN 50131-2-4:2020
EN 50131-2-4:2020 (E)
1 Scope

This document is for combined passive infrared and microwave detectors installed in buildings and

provides for security grades 1 to 4 (see EN 50131-1), specific or non-specific wired or wire-free

detectors, and uses environmental classes I to IV (see EN 50130-5). This document does not include

requirements for detectors intended for use outdoors.

The purpose of the detector is to detect the broad spectrum infrared radiation emitted by an intruder, to

emit microwave signals and analyse the signals that are returned and to provide the necessary range

of signals or messages to be used by the rest of the intrusion alarm system.

For a combined detector where both detection technologies need to be in their activated state in order

to generate an alarm condition, the grade-dependent requirements of this document apply. For

combined detectors which can be configured or operated such that each detection technology can

generate an alarm condition independently, the grade-dependant requirements as defined in

EN 50131-2-2 and EN 50131-2-3 apply, when configured accordingly. Otherwise, it is the responsibility

of the manufacturer to clearly state that the detector does not comply to this document and not to

EN 50131-2-2 and EN 50131-2-3 when put into such a configuration.

It is essential that a detector fulfils all the requirements of the specified grade.

Functions additional to the mandatory functions specified in this document can be included in the

detector, providing they do not influence the correct operation of the mandatory functions.

Requirements for system interconnections are not included in this document.
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 50130-4, Alarm systems — Part 4: Electromagnetic compatibility — Product family standard:

Immunity requirements for components of fire, intruder, hold up, CCTV, access control and social alarm

systems
EN 50130-5, Alarm systems — Part 5: Environmental test methods

EN 50131-1, Alarm systems — Intrusion and hold-up systems — Part 1: System requirements

EN 50131-6, Alarm systems — Intrusion and hold-up systems — Part 6: Power supplies

EN 60404-5, Magnetic materials — Part 5: Permanent magnet (magnetically hard) materials — Methods

of measurement of magnetic properties (IEC 60404-5)

EN 60404-8-1, Magnetic materials — Part 8-1: Specifications for individual materials — Magnetically

hard materials (IEC 60404-8-1)

EN 60404-14, Magnetic materials — Part 14: Methods of measurement of the magnetic dipole moment

of a ferromagnetic material specimen by the withdrawal or rotation method (IEC 60404-14)

---------------------- Page: 9 ----------------------
SIST EN 50131-2-4:2020
EN 50131-2-4:2020 (E)
3 Terms, definitions and abbreviations

For the purposes of this document, the terms, definitions and abbreviations given in EN 50131-1 and

the following 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 https://www.iso.org/obp
3.1 Terms and definitions
3.1.1
activated state

condition where a detection technology participates in the generation of an alarm signal or message

3.1.2
basic detection target

heat source and/or microwave reflector designed to verify the operation of a detector

3.1.3
coverage angle

width of field of view in degrees provided by the detector when measured in the horizontal plane

3.1.4
combined passive infrared and microwave detector

device used to determine the presence of human intruders by sensing the broad-spectrum infrared

emitted by a human being and differences between emitted and reflected microwave signals due to the

associated movement

Note 1 to entry: The infrared and microwave detection technology are housed within the same enclosure.

3.1.5
detection settings

adjustments which influence the performance of the detector (e.g. pulse count settings, gain settings)

3.1.6
detector reference axis

virtual line determined by the detector manufacturer projecting from the point of origin of the detection

coverage pattern
3.1.7
incorrect operation

physical condition that causes an inappropriate signal from a detector in the context of this document

3.1.8
masking

interference with the ability to detect human intruders by the introduction of a physical obstruction such

as metal, plastic, paper or sprayed paints or lacquers on or in close proximity to the detector

3.1.9
microwave detector

device used to determine the presence of human intruders by sensing the differences between emitted

and reflected microwave signals due to movement
3.1.10
passive infrared detector

device used to determine the presence of human intruders by sensing the broad-spectrum infrared

emitted by a human being
---------------------- Page: 10 ----------------------
SIST EN 50131-2-4:2020
EN 50131-2-4:2020 (E)
3.1.11
simulated walk test target

non-human or synthetic heat source or microwave reflector designed to simulate the standard walk test

target
3.1.12
standard walk test target
human being of defined weight and height clothed in close fitting garments
3.1.13
walk test

operational test to demonstrate detection performance during which a detector is stimulated by the

standard walk test target in a controlled environment
3.1.14
walk test attitude, crawling

orientation of the standard walk test target moving with hands and knees in contact with the floor

3.1.15
walk test attitude, upright

orientation of the standard walk test target standing and walking with arms held at the sides of the body

3.2 Abbreviations
HDPE High Density PolyEthylene
PIR Passive InfraRed
EMC Electromagnetic Compatibility
SWT Standard Walk-test Target
BDT Basic Detection Target
FOV Field Of View
4 Functional requirements
4.1 Event Processing
Detectors shall process the events shown in Table 1.
Table 1 — Events to be processed by grade
Grade
Event
1 2 3 4
Intrusion Detection M M M M
Tamper Detection Op M M M
Masking Detection Op Op M M
Low Supply Voltage Op Op M M
Total Loss of Power Supply Op M M M
Local Self-Test Op Op M M
Remote Self-Test Op Op Op M
M = Mandatory
Op = Optional
---------------------- Page: 11 ----------------------
SIST EN 50131-2-4:2020
EN 50131-2-4:2020 (E)
Detectors shall generate signals or messages as shown in Table 2.
Table 2 — Generation of Signals or Messages
Signals or Messages
Event
Intrusion Tamper Fault
No Event NP NP NP
Intrusion M NP NP
Tamper NP M NP
Masking M Op M
Low Supply Voltage Op Op M
Total Loss of Power Supply M Op Op
Local Self-Test Pass NP NP NP
Local Self-Test Fail NP NP M
Remote Self-Test Pass M NP NP
Remote Self-Test Fail NP NP M
M = Mandatory
NP = Not Permitted
Op = Optional

This permits two methods of signalling a masking: either by the intrusion signal and fault signal, or by a

dedicated masking or message. Use of the intrusion signal and fault signal is preferable, as this requires

fewer connections between CIE and detector. If multiple events overlap there will be some signal

combinations that may be ambiguous. To overcome this ambiguity it is suggested that detectors should

not signal ‘intrusion‘ and ‘fault‘ at the same time except to indicate masking. This implies that the detector

should prioritize signals, e.g. 1 Intrusion, 2 Fault, 3 Masking.

When, in Table 1, an event may optionally generate signals or messages, they shall be as shown in this

table.
An independent signal or message may be provided instead.
Total loss of Power Supply does not apply for message based detectors.
4.2 Detection
4.2.1 Detection performance

Both detection technologies shall be in an activated state, before the alarm condition shall be generated.

The detector shall generate an intrusion signal or message when the standard or simulated walk-test

target moves at velocities and attitudes specified in Table 3. For detection across the boundary the walk-

test distance shall be 1,5 m either side of the boundary. For test “Detection within the boundary” the

walk-test distance shall be 3,0 m.
---------------------- Page: 12 ----------------------
SIST EN 50131-2-4:2020
EN 50131-2-4:2020 (E)
Table 3 — General walk test velocity and attitude requirements
Test Grade 1 Grade 2 Grade 3 Grade 4
Detection across the boundary
Required Required Required Required
-1 -1 -1 -1
Velocity 1,0 ms 1,0 ms 1,0 ms 1,0 ms
Attitude Upright Upright Upright Upright
Detection within the boundary Required Required Required Required
-1 -1 -1 -1
Velocity 0,3 ms 0,3 ms 0,2 ms 0,1 ms
Attitude Upright Upright Upright Upright
Detection at high velocity
Not required Required Required Required
-1 -1 -1
Velocity N/A 2,0 ms 2,5 ms 3,0 ms
Attitude N/A Upright Upright Upright
Close-in detection performance
Required Required Required Required
(For coverage angles less than or equal
to 180°)
Distance 2,0 m 2,0 m 0,5 m 0,5 m
-1 -1 -1 -1
Velocity 0,5 ms 0,4 ms 0,3 ms 0,2 ms
Attitude Upright Upright Crawling Crawling
Detection of radial movement
Required Required Required Required
(For coverage angles of 360°)
-1 -1 -1 -1
Velocity 0,5 ms 0,4 ms 0,3 ms 0,2 ms
Attitude Upright Upright Upright Upright
Intermittent movement detection
Not required Not required Required Required
performance
-1 -1
Velocity N/A N/A 1,0 ms 1,0 ms
Attitude N/A N/A Upright Upright

For grade 3 and 4 detectors, the intermittent movement shall consist of the SWT walking 1 m at a velocity of 1,0

ms then pausing for 5 s before continuing. The sequence shall be maintained until the SWT has traversed

through the entire detection area. This constitutes one walk test. The test shall be repeated in each of the

directions shown in Figure C.3.

The detection performance tests required for a detector will depend on the coverage angle claimed.

Therefore this document differentiates between detectors with coverage angles less than or equal to

180°, such as those typically used for wall mounted applications, and detectors with coverage angles of

360° detectors intended for ceiling mounting.
4.2.2 Indication of detection

An indicator shall be provided at the detector to indicate when an intrusion signal or message has been

generated. At grades 1 and 2 this indicator shall be capable of being enabled and disabled either

remotely at Access Level 2 and/or locally enabled/disabled after removal of a cover which provides

tamper detection as described in Tables 1 and 4. At grades 3 and 4 this indicator shall be capable of

being enabled and disabled remotely at Access Level 2.
---------------------- Page: 13 ----------------------
SIST EN 50131-2-4:2020
EN 50131-2-4:2020 (E)
4.3 Operational requirements
4.3.1 Time interval between intrusion signals or messages

Detectors using wired interconnections shall be able to provide an intrusion signal or message not more

than 15 s after the end of the preceding intrusion signal or message.

Detectors using wire free interconnections shall be able to provide an intrusion signal or message after

the end of the preceding intrusion signal or message within the following times:
Grade 1 300 s
Grade 2 180 s
Grade 3 30 s
Grade 4 15 s
4.3.2 Switch on delay

The detector shall meet all functional requirements within 180 s of the power supply reaching its nominal

voltage as specified by the manufacturer.
4.3.3 Self-tests
4.3.3.1 General

Self-tests shall detect failures of a critical function (e.g. unable to detect temperature differences) and

signal these situations according to Table 2. As a minimum the self-tests shall detect failures of the

output of each sensing technology.
4.3.3.2 Local Self-Test

The detector shall automatically test itself at least once every 24 h according to the requirements of

Tables 1 and 2. If normal operation of the detector is inhibited during a local self-test, the detector

inhibition time shall be limited to a maximum of 30 s in any period of 2 h.
4.3.3.3 Remote Self-Test

A detector shall process remote self-tests and generate signals or messages in accordance with

Tables 1 and 2 within 10 s of the remote self-test signal being received, and shall return to normal

operation within 30 s of the remote test signal being received.
4.4 Immunity of the individual technologies to incorrect operation
4.4.1 General

The detector shall be considered to have sufficient immunity to incorrect operation if the following

requirements have been met. No intrusion signal or message shall be generated during the tests.

4.4.2 Immunity to turbulent warm air flow

The PIR component of the detector shall not initiate the generation of any signals or messages when

turbulent warm air is blown over the face of the detector.
4.4.3 Immunity to visible & near infrared radiation

The PIR component of the detector shall not initiate the generation of any signals or messages when a

beam of visible light is swept across the front window or lens through two panes of glass.

4.4.4 Immunity to microwave signal interference by fluorescent lights

The microwave component of the detector shall not initiate the generation of any signals or messages

due to the operation of a fluorescent light source mounted nearby.
---------------------- Page: 14 ----------------------
SIST EN 50131-2-4:2020
EN 50131-2-4:2020 (E)
4.5 Tamper security
4.5.1 General
Tamper security requirements for each grade of detector are shown in Table 4.
Table 4 — Tamper security requirements
Requirement Grade 1 Grade 2 Grade 3 Grade 4
Resistance to access to the inside of the
Required Required Required Required
detector
Detection of access to the inside of the
Not Required Required Required Required
detector
Removal from the mounting surface wired
Not required Not Required Required Required
detectors
Removal from the mounting surface
Not required Required Required Required
wirefree detectors

Resistance to, or detection of, re-orientation Not required Required Required Required

Applied torque 2 Nm 5 Nm 10 Nm
Magnetic field immunity Not required Required Required Required
Magnet Type defined in Annex A Type 1 Type 2 Type 2
Masking Detection Not required Not required Required Required

4.5.2 Resistance to and detection of unauthorised access to components and means of

adjustment

All components, means of adjustment and access to mounting screws, which, when interfered with,

could adversely affect the operation of the detector, shall be located within the detector housing. Such

access shall require the use of an appropriate tool and depending on the grade as specified in Table 4

shall generate a tamper signal or message before access can be gained.

It shall not be possible to gain such access without generating a tamper signal or message or causing

visible damage.
4.5.3 Detection of removal from the mounting surface

A tamper signal or message shall be generated if the detector is removed from its mounting surface for

each claimed mounting type (e.g. wall, ceiling, corner, brackets) in accordance with Table 4.

The tamper detection mechanism shall not be defeated by the use of small tools as per the examples

in Annex I.
4.5.4 Resistance to, or d
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.