Alarm systems - Intrusion and hold-up systems - Part 13: Security Pyrotechnic Obscuration Devices

This document specifies the requirements for pyrotechnic obscuration security devices as a part of an I&HAS. It covers application and performance and also specifies the necessary tests and trials to ensure efficiency and reliability of such obscuration devices.
This European Standard is not intended to cover standalone or vehicular security pyrotechnic obscuration security device.
This European Standard also gives guidelines on the criteria for design, installation, operation and maintenance of security pyrotechnic obscuration security device.

Alarmanlagen - Einbruch- und Überfallmeldeanlagen - Teil 13: Pyrotechnisches Verrauchungs-Gerät

Systèmes d’alarme - Systèmes d’alarme contre l’intrusion et les hold-up - Partie 13: Dispositifs de sécurité pyrotechniques à pouvoir opacifiant

Le présent document spécifie les exigences des dispositifs de sécurité pyrotechniques à pouvoir opacifiant en tant que partie intégrante d’un I&HAS. Il couvre leur application et leurs performances et précise également les contrôles et les essais nécessaires pour garantir l’efficacité et la fiabilité de tels dispositifs.
La présente Norme européenne n’est pas destinée à couvrir les dispositifs de sécurité pyrotechniques à pouvoir opacifiant autonomes ou pour véhicule.
La présente Norme européenne fournit également des lignes directrices relatives aux critères de conception, d’installation, de fonctionnement et de maintenance du dispositif de sécurité pyrotechnique à pouvoir opacifiant.

Alarmni sistemi - Sistemi za javljanje vloma in ropa - 13. del: Varnostne pirotehnične zamegljevalne naprave

General Information

Status
Published
Publication Date
27-May-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
20-May-2020
Due Date
25-Jul-2020
Completion Date
28-May-2020

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SLOVENSKI STANDARD
SIST EN 50131-13:2020
01-julij-2020
Alarmni sistemi - Sistemi za javljanje vloma in ropa - 13. del: Varnostne
pirotehnične zamegljevalne naprave
Alarm systems - Intrusion and hold-up systems - Part 13: Security Pyrotechnic
Obscuration Devices
Alarmanlagen - Einbruch- und Überfallmeldeanlagen - Teil 13: Pyrotechnisches
Verrauchungs-Gerät

Systèmes d’alarme - Systèmes d’alarme contre l’intrusion et les hold-up - Partie 13:

Dispositifs de sécurité pyrotechniques à pouvoir opacifiant
Ta slovenski standard je istoveten z: EN 50131-13:2020
ICS:
13.310 Varstvo pred kriminalom Protection against crime
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
SIST EN 50131-13:2020 en,fr

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

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SIST EN 50131-13:2020
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SIST EN 50131-13:2020
EUROPEAN STANDARD EN 50131-13
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 13.320
English Version
Alarm systems - Intrusion and hold-up systems - Part 13:
Pyrotechnic Obscuration Security Devices

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

les hold-up - Partie 13: Dispositifs de sécurité 13: Pyrotechnisches Verrauchungs-Gerät

pyrotechniques à pouvoir opacifiant

This European Standard was approved by CENELEC on 2020-01-27. 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 50131-13:2020 E
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SIST EN 50131-13:2020
EN 50131-13:2020 (E)
Contents Page

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

Introduction ............................................................................................................................................... 5

Scope ................................................................................................................................................... 6

Normative references ......................................................................................................................... 6

Terms, definitions and abbreviations .............................................................................................. 6

Terms and definitions .................................................................................................................. 6

Abbreviations .............................................................................................................................. 7

Functionality ....................................................................................................................................... 8

POD construction ............................................................................................................................... 8

General........................................................................................................................................ 8

IP/IK rating .................................................................................................................................. 8

Security grade .................................................................................................................................... 8

Environmental performance.............................................................................................................. 8

General Requirements ................................................................................................................ 8

Environmental and EMC Requirements...................................................................................... 8

Technical requirements ..................................................................................................................... 9

Pyrotechnic technology ............................................................................................................... 9

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

Safety .................................................................................................................................................14

Non-toxicity ...............................................................................................................................14

Residue .....................................................................................................................................14

Consumables ............................................................................................................................14

Documentation .................................................................................................................................15

Marking ..............................................................................................................................................15

Design, installation, operation and maintenance .........................................................................15

Testing and verification ...................................................................................................................15

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SIST EN 50131-13:2020
EN 50131-13:2020 (E)

General .............................................................................................................................15

Test conditions ..........................................................................................................................16

Operation .............................................................................................................................17

Performance tests .....................................................................................................................17

Tampering tests ........................................................................................................................18

Testing interconnections ...........................................................................................................20

Power supply .............................................................................................................................21

Environmental tests ...................................................................................................................21

Marking and documentation ......................................................................................................22

Annex A (normative) Performance tests .............................................................................................24

Annex B (normative) Obscuration security device warning sign.....................................................29

Annex C (informative) Guidance on design, installation, operation and maintenance of the

pyrotechnic obscuration security device ......................................................................................31

Bibliography ............................................................................................................................................33

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SIST EN 50131-13:2020
EN 50131-13:2020 (E)
European foreword

This document (EN 50131-13:2020) has been prepared by CLC/TC 79, “Alarm systems”.

The following dates are fixed:
• latest date by which this document has to be (dop) 2021-01-27
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2023-01-27
conflicting with this document have to be
withdrawn

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.

The series EN 50131 will consist of the following parts, under the general title “Alarm systems – Intrusion

and hold-up systems”:
Part 1 System requirements
Part 2–2 Intrusion detectors – Passive infrared detectors
Part 2–3 Requirements for microwave detectors
Part 2–4 Requirements for combined passive infrared and microwave detectors
Part 2–5 Requirements for combined passive infrared and ultrasonic detectors
Part 2–6 Opening contacts (magnetic)
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
Part 13 Pyrotechnic Obscuration Security Devices
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SIST EN 50131-13:2020
EN 50131-13:2020 (E)
Introduction

This document applies to a Pyrotechnic obscuration security device. This document is part of the Intruder

and Hold-up Alarm System (I&HAS) standard series.

The purpose of a pyrotechnic obscuration security device is to reduce the visibility in a protected area by

the use of a non-toxic pyro obscuration system in order to form a barrier between the criminal and the

criminal’s intended target.

This document is intended to define the requirements of a security Pyrotechnic Obscuration Security

Device and to set up performance criteria in order to comply with the purpose described above.

Pyrotechnic obscuration security devices are not explosives, they produce smoke by combustion.

Pyrotechnic obscuration security device differs from Fog obscuration devices in the generation and mean

of obscuration. The safety requirements for pyrotechnical products (marketing, transport, manipulation,

disposal…) are set forth in European regulation. This document is not intended to provide with criteria to

assess the compliance with these regulations.

This document has been designed to be flexible enough to encourage and encompass future

developments in the field of security obscuration device.
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SIST EN 50131-13:2020
EN 50131-13:2020 (E)
1 Scope

This document specifies the requirements for pyrotechnic obscuration security devices as a part of an

IAS. It covers application and performance and specifies the necessary tests and trials to ensure

efficiency and reliability of such obscuration devices.

This document is not intended to cover Hold-up alarm systems, standalone or vehicular security

pyrotechnic obscuration security device.

This document also gives guidelines on the criteria for design, installation, operation and maintenance of

security pyrotechnic obscuration security device.

NOTE This document does not deal with CE marking, chemical (REACH/CLP) or transport regulation

requirements for pyrotechnical devices set forth in the relevant European regulation and harmonized standards

issued for this purpose.
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 16263-3, Pyrotechnic articles - Other pyrotechnic articles - Part 3: Categories and types

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 50131-5-3, Alarm systems - Intrusion systems - Part 5-3: Requirements for interconnections

equipment using radio frequency techniques

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

CLC/TS 50131-7, Alarm systems - Intrusion and hold-up systems - Part 7: Application guidelines

EN 60068-2-75, Environmental testing - Part 2-75: Tests - Test Eh: Hammer tests
EN 60529, Degrees of protection provided by enclosures (IP Code)
EN 60730 (series), Automatic electrical controls for household and similar use

EN 61508 (series), Functional safety of electrical/electronic/programmable electronic safety-related

systems

EN 62262, Degrees of protection provided by enclosures for electrical equipment against external

mechanical impacts (IK code)
3 Terms, definitions and abbreviations
3.1 Terms and definitions

For the purposes of this document, the terms and definitions 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
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SIST EN 50131-13:2020
EN 50131-13:2020 (E)
3.1.1
critical failure

error that affects the intended use of overall functionality and cause its malfunctioning

3.1.2
verified intrusion

signals or messages emanating from two or more independent intrusion detectors that has been

activated, indicating there is a high probability that a genuine intrusion or genuine attempted intrusion has

occurred within a specified timeframe
3.1.3
verified alarm
alarm considered genuine as a result of the use of alarm verification
[SOURCE: CLC/TS 50131-9:2014, 3.1.16]
3.1.4
alarm verification

process to provide information additional to a notified alarm, which increases the probability that the

alarm should be considered genuine
[SOURCE: EN 50518-3:2013]
3.1.5
obscuration

reduction in visibility as a result of the activation of a Pyrotechnic obscuration security device

3.1.6
protected area

designated space in which the pyrotechnic obscuration security device is designed to reduce the visibility

when operated
3.1.7
pyrotechnic obscuration security device

device or a series of separate independent components that make up a device (i.e. pyrotechnical

consumable plus electronic device to command it) that, when activated, produces, by a pyrotechnic

reaction, a dense smoke, to reduce visibility within the protected area
3.1.8
verification
process whereby an intrusion event is confirmed
3.2 Abbreviations

For the purposes of this document, the abbreviations given in EN 50131-1 and the following apply.

ADR European Agreement concerning the International Carriage of Dangerous
Goods by Road
BIT Built-In Test
CIE Control and Indicating equipment

CLP Regulation on classification, labelling and packaging of substances and mixtures

EMC Electromagnetic compatibility
IAS
FMECA Failure Mode, Effects and criticality Analysis
FTA Fault Tree Analysis
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SIST EN 50131-13:2020
EN 50131-13:2020 (E)
IAS Intruder Alarm System(s)
IK Degrees of protection provided by enclosures for electrical equipment against
external mechanical impacts
IP Ingress protection classification
LEA Law Enforcement Authority (Police or governmental body that responds to
activations from security systems)
OECD Organization for Economic Co-operation and Development
POD Pyrotechnic Obscuration Device
European Regulation on Registration, Evaluation, Authorization and Restriction
REACH
of Chemicals
RF Radiofrequency
RSSI Received Signal Strength Indicator
4 Functionality

POD key functionality is to reduce visibility in the protected area as a result of its activation. Additionally,

POD shall comply with functionalities described in 8.2.
5 POD construction
5.1 General

POD may be in a single housing or be distributed in multiple housings (see 3.1.7).

Provision shall be made to allow adequate fixing of the housing to the mounting surface to comply with

environmental and tamper requirements.
5.2 IP/IK rating

All component parts shall be housed in an enclosure meeting at least the requirements at 8.2.4.

6 Security grade

The POD shall be declared to comply with one of the security grades according to EN 50131-1 and shall

meet all the requirements of that grade.
7 Environmental performance
7.1 General Requirements

POD shall attain environmental classification II or III or IV, according to EN 50131-1. Environmental class

shall be specified by the manufacturer.
7.2 Environmental and EMC Requirements

For all grades, the POD shall meet the performance requirements of this document when subject to the

EMC conditions and severity levels defined in EN 50130-4.

EMC emissions are covered by EC Regulatory Directives Under the environmental (climatic, mechanic

and EMC) conditions, POD shall continue to function normally as described in 13.8.

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SIST EN 50131-13:2020
EN 50131-13:2020 (E)
8 Technical requirements
8.1 Pyrotechnic technology

Pyrotechnic module shall meet the criteria set forth in Table 1. Compliance with these requirements shall

be verified by examination of the documentation indicated in Table 1 and supplied by the manufacturer.

ONU assigned to that type of products is ONU 0432.
Table 1 — Pyrotechnic product requirements
Requirement Document to evidence compliance

Category P1 pyrotechnic article according to CE type-examination certificate issued by a

EN 16263-3 Notified Body under directive 2013/29/EC

Classification 1.4, compatibility group S according Certificate issued by a competent entity, stating

to ADR. ADR classification.
Performance: duration Individual POD (Pyrotechnic component) shall
cease the ejection of smoke within two minutes
after activation
8.2 Functional requirements
8.2.1 Input / Output signals
8.2.1.1 Inputs
The minimum information considered as an INPUT to the security POD:
— Trigger: signal to start up the device.
— Verification: signal to confirm the alarm event has been verified.
— Reset: signal to reset to standby mode.
8.2.1.2 Outputs
The minimum information considered as an OUTPUT from the security POD:
— Activation of the pyrotechnic obscuration security device;

— Supervision: Shall send a supervision message with the frequency defined by EN 50131-1:2006, 8.8

elsewhere the CIE monitors the POD supervision information. It shall include the following

information:
— Device identification;
— Battery voltage;
— Tamper status;
— Temperature
— RSSI level (RF only);
— Periodic BIT result;
— Tamper;
— BIT Tamper;
— Failure;
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SIST EN 50131-13:2020
EN 50131-13:2020 (E)
— Over temperature;
— Unique security key generated during learning process.
8.2.1.3 Signals processing

Intruder, tamper and fault signals or messages shall be processed according to EN 50131-1.

Manufacturer shall document the input and output signals and how they are implemented.

8.2.2 Operation
POD shall be activated only after verified alarm.
POD shall not be activated when the IAS is in the unset condition.

Access to the functions of a POD shall be restricted according to the requirements of EN 50131-1

(access levels). Manufacturer shall document how the equipment complies with this requirement.

The POD shall be capable of communicating with the host IAS.

There might be non-critical failures. These may be transmitted as a separate signal or message.

Additional inputs/outputs may be provided (e.g. fire alarm inhibit).
8.2.3 Performance

When tested according to Annex A, the POD shall attain the following performance characteristics in

Table 2:
Table 2 — Performance
Performance T id Grade 1 Grade 2 Grade 3 Grade 4
Reduction of visibility to
T0 from 90 to 180 from 60 to 120 from 30 to 60 from 15 to 30
1 m in seconds
Maintaining obscuration
(to 1 m) during at least T1 5 10 15 20
in minutes
Maintaining obscuration
(to 2 m) during at least T2 15 30 45 60
in minutes
Maintaining obscuration
(to 3 m) during at least T3 30 60 90 120
in minutes
NOTE Tolerances are specified in Annex A.

Reduction of visibility to 1m since the POD is activated till the 1 m marker is not visible as established in

Annex A.
It is admitted that 1 m black marks are visible, but not grey ones.

The POD shall produce smoke that provides obscuration within the protected area according to the

manufacturer's specification.

This specific performance figures shall be provided by the Declaration of Performance (see Clause 10).

8.2.4 Housing protection
The construction of the housing(s) shall meet:
— at least the impact requirements for IK 08 (according to EN 62262);
— at least the protection level IP 20 (according to EN 60529).
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SIST EN 50131-13:2020
EN 50131-13:2020 (E)
8.2.5 Tamper protection
The construction of the housing(s) shall meet:
— the tamper protection requirements of EN 50131-1:2006, 8.7;
— at least the impact requirements for IK 08 (according to EN 62262);
— at least the protection level IP 20 (according to EN 60529).
8.2.6 Tamper detection
8.2.6.1 General

Whether the POD is self-contained within its own housing(s) or distributed within the housing(s) of other

components of the IAS, a tamper signal or message shall be generated according to the requirements

specified in Table 3 before access can be gained to override the detection.
Table 3 — Tamper detection
Event to be detected Grade 1 Grade 2 Grade 3 Grade 4
Access to the inside of the M M M M
housing
Removal from mounting OP OP M M
Removal from mounting OP M M M
(Wire free system
components)
OP OP OP M
Penetration of the housing
M = Mandatory OP = Optional NA = Not Applicable.
When located outside the supervised premises.
8.2.6.2 Access to the inside of housing

A tamper signal or message shall be generated when opening the pyrotechnic obscuration security

device housing by normal means.

The housing shall not permit the introduction of tools of dimensions as specified in Table 4 to defeat the

tamper detection before it has operated.
Table 4 — Tools dimension for tamper detection
Tool Grade 1 Grade 2 Grade 3 Grade 4
Steel rod as specified in 2,5 mm 2,5 mm 1 mm 1 mm
EN 60529, with diameter
Flat bar of dimension 10 × 1 x 10 × 1 x 5 × 0,5 x 5 × 0,5 x
> 300 mm > 300 mm > 300 mm > 300 mm
Steel wire of tensile strength NA NA 1 mm 1 mm
650 - 825 MPa and diameter diameter
dimensions x x
300 mm 300 mm
NA = Not Applicable.

In grades 1 and 2 this requirement does not include insertion of the tool via indicators or operating

controls (EXAMPLES: push-buttons, keypads, LCD or graphic screens) or other apertures; in

grades 3 and 4 such indicators, operating controls and any other apertures accessible to a level 1

user are included.
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SIST EN 50131-13:2020
EN 50131-13:2020 (E)
This requirement shall be verified according to 13.5.3 test method.
8.2.6.3 Removal from mounting

A tamper signal or message shall be generated when attempts to remove the POD from its mounting

surface are detected.

Maximum separation distances for tamper signal generation are defined in Table 5.

It shall not be possible to defeat the removal from mounting detection by sliding a 25 × 1 x > 300 mm

blade or by use of pliers (of thickness 5 mm and reach 150 mm) between the mounting surface and the

POD.
Table 5 — Removal from mounting
Grade 1 Grade 2 Grade 3 Grade 4
Maximum 10 mm 10 mm 5 mm 5 mm
distance before
tamper detected
This requirement shall be verified according to 13.5.4 test method.
8.2.6.4 Penetration of the housing

When mounted according to the manufacturer’s instructions, it shall not be possible to penetrate the

housing of the POD through any of its accessible faces with a metal tool creating a hole of 4 mm or

greater diameter without generating a tamper signal or message.
This requirement shall be verified according to 13.5.5 test method.

NOTE The aim is to detect a reduction of the original integrity of the housing. The definition of the hole diameter

is to set an objective threshold for both product design and performance verification.

8.2.6.5 Monitoring of substitution

Grade 4 POD shall provide means to monitor as required by EN 50131-1. This requirement shall be

verified according to 13.5.6 test method.
8.2.7 Interconnections

The pyrotechnic obscuration security device shall include means to verify that the interconnection

function is operating normally as described in EN 50131-1:2006, 8.8.

If Wireless Radio (RF) interconnections are used, then the system shall meet EN 50131-5-3

requirements.
8.2.8 Timing
Signals and messages shall be processed as specified in EN 50131-1.
8.2.9 Discharge nozzle
8.2.9.1 Drain protection

The discharge drain shall be protected to avoid any risk of injury with the security POD in standby mode.

8.2.9.2 Drain clearance

Discharge nozzle shall include means to ensure no possible obstructions can occur or in case they

occur, safe use is guaranteed.
The manufacturer shall declare how this requirement is achieved.
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SIST EN 50131-13:2020
EN 50131-13:2020 (E)
8.2.10 Accidental triggering
The POD shall not be able to be activated by accidental trigger.

Fail-safe design shall be applied to the electronic component of the POD, to ensure absence of

accidental triggers.

This shall be achieved by compliance with the applicable dependability criteria as being as low as

reasonably practical.
This criterion is defined using following concepts as fail-safe requirements:

a) Design HW to meet a failure rate = < 10E-07 f/h, to avoid as far as reasonable in terms of costs,

single point non-detected failure by application of FMECA and FTA analysis. The failure rate

prediction will be based on MIL-HDBK-217 / BellCore / Telcordia.

b) Include extensive diagnosis on the electronic circuit, taking following concepts from EN 61508 and

EN 60730 Class B (see note below):

— Ignitor/trigger circuit internal test covering power-on BIT and continuity circuit test

— Input circuit failure.
— Over-temperature test

— Micro-processor internal test. Use standard EN 60730 test libraries (provided by

microprocessors vendors) and a watchdog.
— Safety Built-in test (BIT)
— Communication circuit (wired or wireless) with IAS internal test
c) Apply SW development techniques like SIL2 level defined at EN 61508.
POD shall be Class B according to Annex H of EN 60730-1:2016.
8.2.11 Isolation of the POD

Manufacturer shall declare the means of isolating the POD from the CIE and the CIE shall be set up to

avoid POD triggers during installation and/or routine maintenance.
8.2.12 Power Supply

Power supply shall comply with EN 50131-6, and EN 50131-1 requirements for power supply.

A power failure shall not lead to the triggering of the security pyrotechnic obscuration security device.

If a power failure occurs, the security pyrotechnic obscuration security device shall send a signal or

message to the IAS within specified time according to the power supply type and security grade as stated

in EN 50131-6.
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SIST EN 50131-13:2020
EN 50131-13:2020 (E)
9 Safety
9.1 Non-toxicity
9.1.1 General

The manufacturer shall provide proof that the combustion products (smoke) do not present hazard to

human health.
The POD manufacturer shall provide documented evidence of the following items:
— Intended use for Indoor.

— Product use specifications defined by manufacturer: coverage volume, safe smoke concentration

level under use specifications.
— Exposure time for both cases: regular case (minutes) and acute case (hours).
— Non-toxicity proof document.
9.1.2 Test methods and non-toxicity criteria requirements

Non-toxicity proof shall be obtained by applying the following testing methods and criteria with combined

end points assessment:

— OECD Guideline 436 for the testing of chemicals - Acute Inhalation toxicity – Acut

...

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