ISO 7240-4:2017

Fire detection and alarm systems - Part 4: Power supply equipment

ISO 7240-4:2017 specifies requirements, test methods and performance criteria for power supply equipment (PSE) for use in fire detection and alarm systems installed in buildings. For the testing of other types of the PSE, this document is intended to be used only for guidance. The PSE with special characteristics, developed for specific risks, are not covered in ISO 7240-4:2017.

Systèmes de détection et d'alarme d'incendie — Partie 4: Équipement d'alimentation électrique

General Information

• Status: Published
• Publication Date: 22-Nov-2017
• ICS: 13.220.20 - Fire protection
• Technical Committee: ISO/TC 21/SC 3 - Fire detection and alarm systems
• Drafting Committee: ISO/TC 21/SC 3 - Fire detection and alarm systems
• Current Stage: 9093 - International Standard confirmed
• Start Date: 15-Sep-2025
• Completion Date: 13-Dec-2025

Relations

• Revises: ISO 7240-4:2003 - Fire detection and alarm systems - Part 4: Power supply equipment
• Effective Date: 04-Nov-2015

Overview

ISO 7240-4:2017 - "Fire detection and alarm systems - Part 4: Power supply equipment" specifies the requirements, test methods and performance criteria for power supply equipment (PSE) used in building fire detection and alarm systems. The standard defines how main and standby power sources, chargers, interfaces and software-related functions are expected to perform and be tested. It is intended as the normative reference for PSE used in fire alarm installations; other PSE types are covered only for guidance, and specially tailored PSE for unusual risks are excluded.

Key topics and technical requirements

ISO 7240-4:2017 addresses the full lifecycle of PSE performance, including:

• Power source requirements: design and performance expectations for main and standby power sources and their interfaces with fire alarm systems.
• Charger and battery management: requirements and test procedures for battery charging, standby capability and high‑battery‑impedance behavior.
• Fault detection and monitoring: required fault reporting, diagnostics and how software must monitor program integrity and memory contents.
• Mechanical and environmental robustness: mechanical construction, mounting, impact, vibration and environmental tests (cold, dry heat, damp heat) with operational and endurance criteria.
• Electromagnetic compatibility (EMC): immunity and EMC tests relevant to operational reliability in real installations.
• Testing and documentation: detailed functional and environmental test schedules, test reporting, marking and required product, software and installation documentation.

(These topics are reflected in the standard’s clauses on requirements, tests, test reports, marking and data.)

Practical applications and who uses this standard

ISO 7240-4:2017 is used to ensure reliable, safe power for life-safety fire detection and alarm equipment. Typical users and applications include:

• Manufacturers - design, verify and certify PSE (integrated and standalone) to meet regulatory and market requirements.
• Test laboratories and certification bodies - perform the functional, environmental and EMC tests described in the standard.
• System designers and specifiers - select compliant PSE for building fire alarm systems and create installation specifications.
• Installers and commissioning engineers - follow documented requirements for installation, testing and marking.
• Facility managers and fire safety engineers - verify that power supplies meet performance and maintenance expectations for continuous protection.

Practical benefits: improved system reliability during mains failure, consistent battery charging behavior, clearer fault reporting, and demonstrable compliance for regulatory approval and insurance.

Related standards

• ISO 7240 series (other parts cover detectors, control panels and peripheral devices).
• National or regional fire safety and EMC standards and electrical installation rules that interact with PSE selection and installation.

Keywords: ISO 7240-4:2017, fire detection and alarm systems, power supply equipment, PSE testing, fire alarm power supply, standby power, battery charger, EMC, environmental testing, fire safety standards.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 7240-4
Second edition
2017-11
Fire detection and alarm systems —
Part 4:
Power supply equipment
Systèmes de détection et d'alarme d'incendie —
Partie 4: Équipement d'alimentation électrique
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2017 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 2
4.1 Symbols . 2
4.2 Abbreviated terms . 2
5 Requirements . 2
5.1 General . 2
5.2 Compliance . 2
5.3 Power sources . 3
5.3.1 General. 3
5.3.2 Main power source. 3
5.3.3 Standby power source . . 3
5.4 Charger . 4
5.5 Faults . 4
5.6 Mechanical . 5
5.7 Power supply interface . 5
5.8 Software . 5
5.8.1 General. 5
5.8.2 Program monitoring . 5
5.8.3 Storage of programs and data . 6
5.8.4 Monitoring of memory contents . 6
6 Tests . 6
6.1 General . 6
6.1.1 Standard atmospheric conditions for testing . 6
6.1.2 Mounting and orientation . 7
6.1.3 Electrical connection . 7
6.2 Functional tests . 7
6.2.1 The object of test. 7
6.2.2 Test schedule . 7
6.2.3 Full functional test . 8
6.2.4 Reduced functional test . 9
6.3 Charger and the standby power source test .10
6.3.1 Test procedure .10
6.3.2 Requirements .10
6.4 High battery impedance test .10
6.4.1 Object of test .10
6.4.2 General.10
6.4.3 Test procedure for non-integrated PSE .10
6.4.4 Requirements for integrated PSE .11
6.4.5 Test procedure for integrated PSE .11
6.4.6 Requirements for integrated PSE .12
6.5 Environmental tests .12
6.5.1 General.12
6.5.2 Tests for one specimen .13
6.5.3 Tests for more than one specimen .13
6.5.4 Requirements .13
6.6 Cold (operational) .14
6.6.1 Object of test .14
6.6.2 Test procedure .14
6.6.3 Requirements .14
6.7 Damp heat, steady-state (operational).15
6.7.1 Object of test .15
6.7.2 Test procedure .15
6.7.3 Requirements .15
6.8 Impact (operational) — Optional test .16
6.8.1 Object of test .16
6.8.2 Test procedure .16
6.8.3 Requirements .16
6.9 Vibration, sinusoidal (operational) — Optional test .17
6.9.1 Object of test .17
6.9.2 Test procedure .17
6.9.3 Requirements .18
6.10 Electromagnetic compatibility (EMC), Immunity tests (operational) .18
6.11 Damp heat, steady state (endurance) .18
6.11.1 Object of test .18
6.11.2 Test procedure .18
6.11.3 Requirements .19
6.12 Vibration, sinusoidal (endurance) — Optional test .19
6.12.1 Object of test .19
6.12.2 Test procedure .19
6.12.3 Requirements .20
6.13 Dry heat (operational) (optional) .20
6.13.1 Object of test .20
6.13.2 Test procedure .20
6.13.3 Requirements .21
7 Test report .21
8 Marking .21
9 Data .22
9.1 General .22
9.2 Software documentation .22
9.3 Hardware documentation .23
9.4 Installation and user documentation .23
Annex A (informative) .24
Bibliography .25
iv © ISO 2017 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire
fighting, Subcommittee SC 3, Fire detection and alarm systems.
This second edition cancels and replaces the first edition (ISO 7240-4:2003), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— this document has been reformatted and modified to comply with the current ISO structure for
standards;
— a reference has been made to power ratings in place of current ratings as this is better with custom
and practice of product specifications; however, it is expected that these new values can be derived
from previous test results quoted in voltage and current;
— the time limits for notification of some PSU faults have been added;
— an optional dry heat, (operational) test has been added.
A list of all the parts in the ISO 7240 series can be found on the ISO website.
Introduction
This document is based on ISO 7240-4:2003.
The power supply function (see ISO 7240-1:2014, Figure 1, item L), within a fire detection and alarm
system (FDAS) installed in and around buildings, is provided by power supply equipment (PSE). The
PSE provides power to all parts of the FDAS, either by direct connection or through one function to
another function.
This document is drafted on the basis of mandatory functions, which are to be provided on all the PSE
and optional functions (with requirements) which may be provided. It is intended that the options
be used for specific applications and to meet the fire detection and alarm system design objectives.
Each optional function is included as a separate entity, with its own set of associated requirements, in
order to permit the PSE with different combinations of functions to comply with this document. Other
functions associated with fire detection and fire alarm may also be provided, even if not specified in
this document.
vi © ISO 2017 – All rights reserved

INTERNATIONAL STANDARD ISO 7240-4:2017(E)
Fire detection and alarm systems —
Part 4:
Power supply equipment
1 Scope
This document specifies requirements, test methods and performance criteria for power supply
equipment (PSE) for use in fire detection and alarm systems installed in buildings.
For the testing of other types of the PSE, this document is intended to be used only for guidance. The
PSE with special characteristics, developed for specific risks, are not covered 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.
ISO 7240-1:2014, Fire detection and alarm systems — Part 1: General and definitions
IEC 60068-1, Environmental testing — Part 1: General and guidance
IEC 60068-2-1, Environmental testing — Part 2: Tests. Tests A: cold
IEC 60068-2-6, Environmental testing — Part 2: Tests. Test Fc: vibration (sinusoidal)
IEC 60068-2-47, Environmental testing — Part 2: Test methods — Mounting of components, equipment and
other articles for vibration, impact and similar dynamic tests
IEC 60068-2-75, Environmental testing — Part 2: Tests — Test Eh: Hammer tests
IEC 60068-2-78, Environmental testing — Part 2-78: Tests – Test Cab: Damp heat, steady state
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 60721-3-3:1994, Classification of environmental conditions — Part 3: Classification of groups of
environmental parameters and their severities —Section 3: Stationary use and weatherprotected locations
IEC 60950-1, Information technology equipment — Safety — Part 1: General requirements
IEC 62599-2, Alarm systems — Part 2: Electromagnetic compatibility — Immunity requirements for
components of fire and security alarm systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 7240-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
4 Symbols and abbreviated terms
4.1 Symbols
P rated maximum output power that can be supplied continuously
a, max
P rated maximum output power higher than P that can be supplied while battery
b, max a, max
charging is not required
P rated maximum output power higher which can be supplied by the standby power source
c, max
P minimum output power specified by the manufacturer
min
V nominal mains voltage of the public electricity supply
n
4.2 Abbreviated terms
FDAS fire detection and alarm system
FDCIE fire detection control and indicating equipment
PSE power supply equipment
5 Requirements
5.1 General
5.1.1 The PSE shall have safety characteristics in accordance with IEC 60950-1 for protection against
direct and indirect contact, for the separation of the extra low voltage DC circuits from the low voltage AC
circuits and for earthing of metal parts.
5.1.2 All outputs shall have appropriate power limitations in order to ensure that in case of external
short circuits no danger exists because of heat production.
5.2 Compliance
5.2.1 In order to comply with this document, the PSE shall meet the following requirements.
a) Clause 5, which shall be verified by visual inspection or engineering assessment, shall be tested in
accordance with Clause 6 and shall meet the requirements of the tests.
b) Clauses 8 and 9, shall be verified by visual inspection.
5.2.2 If an optional function with requirements is included in the PSE, then all the corresponding
requirements shall be met.
5.2.3 If functions other than those specified in this document are provided, they shall not jeopardize
compliance with any requirement of this document.
2 © ISO 2017 – All rights reserved

5.3 Power sources
5.3.1 General
5.3.1.1 There shall be at least two power sources for the power supply of the FDAS: the main power
source and the standby power source.
5.3.1.2 Each power source, on its own, shall be capable of meeting the PSE manufacturer's output
specification or, in the case of an integrated the PSE, shall be capable of operating the equipment in which
it is integrated within its specifications.
5.3.1.3 Switching from one power source to the other shall not cause any change in status or indications
within other equipment of the FDAS, other than those relating to the power supply.
5.3.1.4 Failure of one of the power sources shall not cause the failure of any other power source or the
failure of the supply of power to the FDAS.
NOTE The compatibility of the separated PSE with the other equipment, for example, FDCIE, is dealt with in
ISO 7240-13.
5.3.2 Main power source
5.3.2.1 The main power source shall be designed to operate from the public electricity supply or
equivalent system.
5.3.2.2 When the main power source is available, it shall be the exclusive source of power to the FDAS,
except for currents associated with battery monitoring.
5.3.2.3 If the main power source fails, then the PSE shall automatically switch over to a standby power
source. When the main power source is restored, the PSE shall automatically switch back to the main
power source.
5.3.2.4 When operated from the main power source, the following shall apply.
a) The PSE shall be capable of operating in accordance with its specification given in the
manufacturer's data, irrespective of the condition of the standby power source. This includes any
charge condition of the standby power source, or open circuit or short circuit of the connection to
the standby power source.
b) The PSE shall be capable of continuously supplying P and simultaneously charging a battery
a, max
discharged to its final voltage.
c) It may allow battery charging to be limited or interrupted when the PSE is delivering power greater
than P (see note to Table 1).
a, max
5.3.3 Standby power source
5.3.3.1 At least one standby power source shall be a rechargeable battery.
5.3.3.2 When operated from the standby power source, the PSE shall be capable of operating in
accordance with the specification given in the manufacturer's data. The PSE shall be capable of supplying
P , irrespective of the condition of the main power source, and with an internal resistance of the
c, max
battery and its associated circuitry, e.g. connections, fuses (see 6.4) equal to R .
i, max
NOTE Standby periods and alarm periods for specific applications are specified in ISO 7240-14 and
ISO 7240-19, or other national design and installation standards where they take precedence.
5.3.3.3 The battery shall
— be rechargeable,
— be suitable to be maintained in a fully charged state,
— be constructed for stationary use,
— be marked with its type designation and code or number identifying the production period, and
— have a safety mechanism to prevent explosion.
5.3.3.4 If the battery is mounted in a cabinet which houses other FDAS equipment, then it shall be of
the sealed type and shall be mounted in accordance with the manufacturer's data.
5.3.3.5 When operating from a standby power source, the PSE shall have a facility to switch off the
PSE output if the output voltages or the voltage of the battery falls below a value specified by the PSE
manufacturer.
5.4 Charger
5.4.1 The PSE shall include charging equipment to charge the battery and maintain it in a fully
charged state.
5.4.2 The charger shall be designed and rated so that
— the battery can be charged automatically,
— a battery discharged to its final voltage can be recharged to at least 80 % of its rated capacity within
24 h and thereafter be maintained at its float voltage at least after another 48 h, and
— the charging characteristics are within the battery manufacturer's specification for the range of
battery temperatures reached with the ambient temperature (i.e. outside the standby power source
o o
enclosure) from –5 C to +40 C.
5.4.3 Except for currents associated with battery monitoring, the battery shall not discharge through
the charger when the charging voltage is below the battery voltage.
5.5 Faults
5.5.1 The PSE shall be capable of recognizing and signalling the following faults:
a) a loss of the main power source within 90 min of the occurrence;
b) loss of the standby power source within 1 min of the occurrence;
c) if batteries can be damaged by deep charge, the PSE shall have a facility to protect the batteries
against deep charge. In this case, reduction of the battery voltage to less than the final voltage
when the main power source is unavailable shall signal a fault. Manufacturers may signal a fault at
a higher voltage, depending on the battery requirements or other factors (such as maximizing life
expectancy);
d) loss of the battery charging voltage within 90 min of the occurrence, except where the charger is
switched off or limited as under 5.3.2.4 c);
e) the battery impedance shall be monitored as described in 6.4 and a fault warning signal given
within 4 h of the occurrence of a high battery impedance.
4 © ISO 2017 – All rights reserved

5.5.2 If the PSE is separately housed from other functions of the FDAS (ISO 7240-1:2014, Figure 1),
then at least a fault output common to the faults listed in 5.5.1 shall be provided. This output shall also be
given if the PSE is de-energized.
5.5.3 If the PSE is housed within the cabinet of other equipment within the FDAS (e.g. FDCIE), then
the faults listed in 5.5.1 shall be indicated in accordance with the requirements of the other equipment,
either on the equipment or on the PSE itself.
5.6 Mechanical
5.6.1 The cabinet of the PSE shall be of robust construction, consistent with the method of installation
recommended in the documentation. It shall meet at least the classification IP 30 of IEC 60529.
5.6.2 The PSE may be housed either in a separate cabinet or in cabinets associated with other FDAS
equipment.
5.6.3 If the PSE is housed in the cabinet of other equipment within the FDAS (e.g. FDCIE), then manual
controls, fuses, calibration elements, etc. for disconnection and adjustment of the power sources shall be
accessible only by persons who are trained and authorized to maintain or repair the PSE in accordance
with the manufacturer's published instructions and data.
NOTE This corresponds to Access Level 3 or 4 as defined in ISO 7240-2 and ISO 7240-16.
5.6.4 If the PSE is not housed in the cabinet of other equipment within the FDAS (e.g. FDCIE), then
manual controls, fuses, calibration elements, etc. for disconnection and adjustment of the power sources
shall be accessible only by the use of a tool or key.
5.6.5 All manual controls, fuses, calibration elements and cable terminals shall be clearly labelled
(e.g. to indicate their function, rating or reference to appropriate drawings).
5.6.6 If mandatory indicators required by other equipment within the FDAS (e.g. FDCIE) are repeated
on a separately housed the PSE, then the indicators shall be in accordance with the requirements of the
relevant equipment.
5.7 Power supply interface
Where the PSE directly supplies power to functions of the FDAS and is not housed in the same cabinet as
the other equipment, then an interface shall be provided for at least two transmission paths to the other
equipment, such that a short circuit or interruption in one path does not prevent the supply of power.
5.8 Software
5.8.1 General
The PSE may contain elements which are controlled by software in order to fulfil requirements of
this document. In this case, the PSE shall comply with the requirements of 5.8 where relevant to the
technology used.
5.8.2 Program monitoring
5.8.2.1 The execution of the program shall be monitored to prevent the occurrence of a deadlock in the
system. The monitoring device shall signal a system fault if routines associated with the main functions
of the program are not executed within a time limit of 100 s.
5.8.2.2 The functioning of the monitoring device and the signalling of a fault warning shall not be
prevented by a failure in the execution of the program of the monitored system.
5.8.2.3 If an execution failure as in 5.8.2.1 is detected, the PSE shall enter a safe state within 100 s. This
safe state shall be defined by the manufacturer.
The safe state should be defined by the manufacturer and should not give a false impression to a user that
the PSE remains operational if it is not. In practice, it may be acceptable either to stop or automatically
restart the program execution. If there is a possibility that the memory may have been corrupted, the
restart procedure should check the contents of this memory and, if necessary, re-initialize the running
data to ensure that the PSE enters a safe operating state. Even if program execution is successfully
restarted, it is important that the user be made aware of the incident. For this reason, it could be
advantageous for the PSE to be capable of automatically recording details of the restart event.
5.8.2.4 The monitoring device shall use the highest priority feature provided to enter the safe state of
5.8.2.3 (e.g. the highest priority non-maskable interrupt).
5.8.3 Storage of programs and data
5.8.3.1 All executable code and data necessary to comply with this document shall be held in memory
which is capable of continuous, unmaintained, reliable operation for a period of at least 10 years.
NOTE In the existing state of the art, memory with moving mechanical parts is not believed to be sufficiently
reliable. The use of tapes, or magnetic or optical data discs, for the storage of programs and data is therefore not
considered to be acceptable at the time of publication.
5.8.3.2 The program shall be held in non-volatile memory. Each memory device shall be identifiable
such that its contents can be uniquely cross-referenced to the software documentation.
5.8.4 Monitoring of memory contents
The contents of the memories containing the program shall be automatically checked at intervals not
exceeding 1 h. The checking device shall signal a system fault if a corruption of the memory contents is
detected.
6 Tests
6.1 General
6.1.1 Standard atmospheric conditions for testing
Unless otherwise stated in a test method, the testing shall be carried out after the test specimen has
been allowed to stabilize in the standard atmospheric conditions for testing according to IEC 60068-1,
as follows:
a) temperature: 15 °C to 35 °C;
b) relative humidity: 25 % to 75 %;
c) air pressure: 86 kPa to 106 kPa.
The temperature and humidity shall be substantially constant for each environmental test where the
standard atmospheric conditions are applied.
6 © ISO 2017 – All rights reserved

6.1.2 Mounting and orientation
Unless otherwise stated in a test procedure, the specimen shall be mounted in its normal orientation by
the normal means of mounting indicated by the manufacturer.
6.1.3 Electrical connection
If the test procedure requires the specimen to be operating, then, unless otherwise specified,
a) it shall be connected to the main power source and to a standby power source of an appropriate
capacity for the test,
b) the output or outputs shall be loaded corresponding to the maximum continuous power (P ), and
a, max
NOTE For integrated PSE, the loading corresponding to P is the condition of the equipment with
a, max
maximum internal power dissipation and output loading that can be expected to occur continuously.
c) all inputs and outputs shall be connected to cables, equipment and/or dummy loads as specified by
the manufacturer.
6.2 Functional tests
6.2.1 The object of test
The object of the functional test is to demonstrate the operation of the equipment before, during and/or
after the environmental conditioning.
6.2.2 Test schedule
6.2.2.1 The functional tests are shown in Table 1.
Table 1 — Functional tests
Mains supply Loading Duration
Test Condition of battery Purpose of test
voltage condition of test
a b
1 V + 10 % Discharged P Performance within
n a, max
4 h
specification, no overheating
b
2 V − 15 % Discharged P Performance within
n a, max
4 h
specification, no overheating
b c
3 V − 15 % Discharged P Output voltage at within
n b, max
manufacturers specification 5 min
d c
4 Disconnected Discharging P — —
b, max
a
V is nominal voltage of the public electricity supply or equivalent.
n
b
A battery of max. specified capacity discharged to its final voltage as described in 6.3.1.1. The battery is allowed to
charge during the test.
c
For integrated PSE, the loading corresponding to P is the condition of the equipment with the maximum internal
b, max
power dissipation and output loading that can be expected to occur while battery charging is not required. If the equivalent
of P is not specified by the manufacturer, the condition equivalent to P shall be applied.
b, max a, max
d
In this test, the battery may be replaced with a laboratory power supply capable of supplying the required output
current. The output voltage of the power supply shall be gradually reduced from the fully charged voltage of the battery to
the voltage at which the PSE outputs switch off as described in 5.3.3.5.
e
Mains shall be applied after having replaced the battery by a short circuit.
f
Replace the battery by a short circuit after the mains is applied.
g
A battery charged to its fully charged voltage.
h  For integrated PSE, the loading corresponding to P is the condition of the equipment with the minimum internal
min
power dissipation and minimum output loading.
Table 1 (continued)
Mains supply Loading Duration
Test Condition of battery Purpose of test
voltage condition of test
5 V − 15 % Replaced by short P
n a, max
— —
e
circuit
6 V − 15 % Replaced by short P
n a, max
— —
f
circuit
c
7 V + 10 % Disconnected P — —
n b, max
c
8 V − 15 % Disconnected P — —
n b, max
g h
9 V + 10 % Fully charged P — —
n min
a
V is nominal voltage of the public electricity supply or equivalent.
n
b
A battery of max. specified capacity discharged to its final voltage as described in 6.3.1.1. The battery is allowed to
charge during the test.
c
For integrated PSE, the loading corresponding to P is the condition of the equipment with the maximum internal
b, max
power dissipation and output loading that can be expected to occur while battery charging is not required. If the equivalent
of P is not specified by the manufacturer, the condition equivalent to P shall be applied.
b, max a, max
d
In this test, the battery may be replaced with a laboratory power supply capable of supplying the required output
current. The output voltage of the power supply shall be gradually reduced from the fully charged voltage of the battery to
the voltage at which the PSE outputs switch off as described in 5.3.3.5.
e
Mains shall be applied after having replaced the battery by a short circuit.
f
Replace the battery by a short circuit after the mains is applied.
g
A battery charged to its fully charged voltage.
h  For integrated PSE, the loading corresponding to P is the condition of the equipment with the minimum internal
min
power dissipation and minimum output loading.
6.2.3 Full functional test
6.2.3.1 Object of the test
The object of the full functional test is to demonstrate that the PSE complies with the requirements in
5.3, 5.4 and 5.7.
6.2.3.2 Procedure for non-integrated PSE
6.2.3.2.1 Conduct all nine tests with voltage combinations and output current, in accordance with
Table 1.
6.2.3.2.2 During tests 1 and 2, measure and record the output voltages of the PSE and the temperatures
of the components with high power dissipation, e.g. transformers, rectifiers and voltage regulators.
6.2.3.2.3 During tests 3 to 9, measure and record the output voltages.
6.2.3.2.4 During tests 7 and 8, measure and record the ripple voltage, including the switching frequency
in the case of a switch mode technology PSE.
6.2.3.3 Requirements for non-integrated PSE
6.2.3.3.1 In tests 1 up to 9, the output voltage shall remain within manufacturer's specification.
6.2.3.3.2 In tests 1 and 2, the surface temperatures of the components shall not exceed the maximum
temperature given by the PSE manufacturer [see 9.1 b)].
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6.2.3.3.3 In tests 7 and 8, the ripple on the PSE output voltage shall not exceed the manufacturer's
specification.
6.2.3.4 Procedure for integrated PSE
6.2.3.4.1 Conduct all nine tests in accordance with Table 1, with the voltage combinations and
condition equivalent to P as in 6.1.3 b) and equivalent to P .
a, max b, max
6.2.3.4.2 Monitor the specimen during the tests to check that the functions of the equipment within
which the PSE is integrated stay within the manufacturer’s specifications.
6.2.3.4.3 Measure and record the temperature of the components with high power dissipation.
6.2.3.4.4 During tests 3 to 9, monitor that the functions of the equipment within which the PSE is
integrated stay within the specification.
6.2.3.5 Requirements for integrated PSE
6.2.3.5.1 In tests 1 to 9, the functions of the equipment within which the PSE is integrated shall stay
within the manufacturer’s specification.
6.2.3.5.2 In tests 1 and 2, the surface temperature of the components shall not exceed the maximum
temperature given by the PSE manufacturer.
6.2.4 Reduced functional test
6.2.4.1 Object of the test
The object of the reduced functional test is to demonstrate that the PSE operates correctly before, after
or during (if specified) each of the tests specified in 6.5.
6.2.4.2 Procedure for non-integrated PSE
For non-integrated PSE, the test consists of tests 8 and 9 in accordance with Table 1. The output voltages
and test results shall be measured and recorded, except in test 8 where the ripple voltage need not be
measured.
6.2.4.3 Requirements for non-integrated PSE
For non-integrated PSE, the output voltages shall remain within the range specified by the PSE
manufacturer.
6.2.4.4 Procedure for integrated PSE
For integrated PSE, the test consists of tests 8 and 9 in accordance with Table 1. Monitor the specimen
during the tests to check that the functions of the equipment within which the PSE
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