prEN 54-2

SLOVENSKI STANDARD
01-april-2016
Sistemi za odkrivanje in javljanje požara ter alarmiranje - 2. del: Oprema za
kontrolo in indikacijo
Fire detection and fire alarm systems - Part 2: Control and indicating equipment
Brandmeldeanlagen - Teil 2: Brandmelderzentralen
Systèmes de détection et d’alarme incendie - Partie 2 : Équipement de contrôle et de
signalisation
Ta slovenski standard je istoveten z: prEN 54-2
ICS:
13.220.20 3RåDUQD]DãþLWD Fire protection
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2016
ICS 13.220.20 Will supersede EN 54-2:1997
English Version
Fire detection and fire alarm systems - Part 2: Control and
indicating equipment
Systèmes de détection et d'alarme incendie - Partie 2 : Brandmeldeanlagen - Teil 2: Brandmelderzentralen
Équipement de contrôle et de signalisation
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 72.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 54-2:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
Introduction . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and abbreviations . 9
3.1 Terms and definitions . 9
3.2 Abbreviations . 11
4 Requirements . 12
4.1 Compliance . 12
4.2 Operational reliability . 12
4.2.1 Functional conditions and related indications. 12
4.2.2 Output to C . 25
4.2.3 Output to control function for E . 26
4.2.4 Output to G . 27
4.2.5 Output to control function J . 28
4.2.6 Output to M . 29
4.2.7 Delays to outputs, (see also Annex E) . 30
4.2.8 Dependencies on more than one alarm signal (see also Annex E) . 31
4.2.9 Alarm counter. 33
4.2.10 Fault signals from components of the FDAS . 33
4.2.11 Loss of the power supply . 33
4.2.12 Disablement of addressable devices . 33
4.2.13 Test condition . 34
4.2.14 Standardized input/output interface - see also Annex G . 35
4.2.15 CIE network interface - see also Annex L . 35
4.2.16 Fault monitoring and indication of degraded transmission paths . 37
4.3 Durability of operational reliability, environmental . 37
4.3.1 Cold (operational) . 37
4.3.2 Damp heat, steady-state (operational) . 37
4.3.3 Impact (operational) . 37
4.3.4 Vibration, sinusoidal (operational) . 37
4.4 Durability of operational reliability, EMC immunity . 38
4.4.1 Electrostatic discharge . 38
4.4.2 Radiated electromagnetic fields . 38
4.4.3 Conducted disturbances induced by electromagnetic fields . 38
4.4.4 Fast transient bursts . 38
4.4.5 Slow high energy voltage surges . 38
5 Testing, assessment and sampling methods . 38
5.1 General . 38
5.1.1 Provision of equipment and supporting information and tools . 38
5.1.2 Equipment configuration . 39
5.1.3 Atmospheric conditions for testing . 40
5.1.4 Tolerances . 40
5.1.5 Full functional test and design assessments for operational reliability . 40
5.1.6 Reduced functional test . 43
5.1.7 Test schedule and criteria of compliance for the tests of 5.3 and 5.4 . 43
5.2 Operational reliability . 44
5.2.1 Functional conditions and related indications . 44
5.2.2 Output to C . 55
5.2.3 Output to E . 56
5.2.4 Output to G . 57
5.2.5 Output to control function J . 59
5.2.6 Interface to M . 60
5.2.7 Delays to outputs . 62
5.2.8 Dependencies on more than one alarm signal . 63
5.2.9 Alarm counter . 64
5.2.10 Fault signals from components of the FDAS . 65
5.2.11 Loss of the power supply . 65
5.2.12 Disablement of addressable devices . 65
5.2.13 Test condition . 66
5.2.14 Standardized input/output interface- see also Annex G . 67
5.2.15 CIE network interface - see also Annex L . 67
5.2.16 Fault monitoring and indication of degraded transmission paths . 68
5.3 Durability of operational reliability, Environmental . 70
5.3.1 Cold (operational) . 70
5.3.2 Damp heat, steady-state (operational) . 70
5.3.3 Impact (operational) . 71
5.3.4 Vibration, sinusoidal (operational) . 72
5.4 Durability of operational reliability, EMC Immunity . 72
5.4.1 Electrostatic discharge . 72
5.4.2 Radiated electromagnetic fields . 73
5.4.3 Conducted disturbances induced by electromagnetic fields . 73
5.4.4 Fast transient bursts . 74
5.4.5 Slow high energy voltage surges . 75
6 Assessment and verification of constancy of performance (AVCP) . 75
6.1 General . 75
6.2 Type testing . 76
6.2.1 General . 76
6.2.2 Test samples, testing and compliance criteria . 76
6.2.3 Test reports . 77
6.3 Factory production control (FPC) . 77
6.3.1 General . 77
6.3.2 Requirements . 78
6.3.3 Product specific requirements . 80
6.3.4 Initial inspection of factory and FPC . 80
6.3.5 Continuous surveillance of FPC . 81
6.3.6 Procedure for modifications . 81
6.3.7 One-off products, pre-production products, (e.g. prototypes) and products produced in very
low quantities . 81
7 Classification and designation . 82
8 Marking, labelling and packaging . 82
Annex A (normative) Documentation and manufacturer's declarations . 83
A.1 General requirements and manufacturer's declarations . 83
A.2 Installation and user documentation . 83
A.3 Design documentation . 84
A.4 Software design documentation . 84
Annex B (informative) Access levels . 86
Annex C (informative) Processing of signals from fire detectors . 88
Annex D (informative) Zones and the zonal indication of fire alarms . 89
Annex E (informative) Outputs, delays to outputs and dependencies on more than one alarm signal
............................................................................................................................................................................. 90
E.1 Outputs and output signal timings . 90
E.2 Delays to output signals . 90
E.3 Dependencies on more than one alarm signal . 90
E.3.1 General . 90
E.3.2 Dependency on more than one alarm signal without initial display (4.2.8.1) . 91
E.3.3 Dependency on more than one alarm signal with initial display (4.2.8.2) . 91
E.3.4 Dependency on more than one alarm signal with delay of outputs (4.2.8.3) . 91
E.3.5 Dependency on more than one alarm signal with delay override (4.2.8.4) . 91
Annex F (informative) Fault recognition and indication . 92
Annex G (informative) Standardized input/output interface for the connection of ancillary
equipment (e.g. a fire brigade panel) . 94
Annex H (informative) Integrity of transmission paths . 95
Annex I (informative) CIE controlled by software and related technology . 96
Annex J (informative) Testing of disablements . 98
Annex K (informative) Design changes to CIE under Factory Production Control (FPC) . 99
K.1 General . 99
K.2 Minor design changes . 99
K.3 Major design changes . 100
Annex L (informative) Distributed CIE and networked CIE . 101
L.1 General considerations . 101
L.2 Distributed CIE . 101
L.3 Networked CIE . 101
Annex M (informative) Summary of indications . 103
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU
Construction Products Regulation . 116
ZA.1 Scope and relevant characteristics . 116
ZA.2 Procedure for assessment and verification of constancy of performance (AVCP) of Control
and indicating equipment . 120
ZA.2.1 System of AVCP . 120
ZA.2.2 Declaration of performance (DoP) . 121
ZA.3 CE marking and labelling . 133
Bibliography . 144

European foreword
This document (prEN 54-2:2015) has been prepared by Technical Committee CEN/TC 72 “Fire detection and
fire alarm systems”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 54-2:1997.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
EN 54-2 has been revised to comply with the requirements of the CPR and to align it with CEN rules for the
drafting of harmonized standards. The changes required a complete reformatting of the standard to place the
requirements in Clause 4 and the test requirements in Clause 5. As a result there is direct correlation between
the subclauses in Clause 4 and Clause 5. A reader may therefore compare the requirement in 4.x.y.z with its
respective test in 5.x.y.z.
Normative references have been updated to reflect the current status of referenced standards and for
combined CIE and PSUs this standard should be used in conjunction with EN 54-4.
CIE often have to have different features to meet national regulations or to correctly function in different types
of applications and it is not always commercially acceptable to provide all of the features that might be
required in every possible circumstance. EN 54-2:1997 met this by having options with requirements, but this
is not allowed under current drafting conventions. To overcome this problem this standard is structured in
such a way as to allow manufacturers to declare which of the requirements have been incorporated in the
supplied equipment. Some requirements are essential for all CIE (Subclauses 4.2.1 and 4.3 to 4.4), in which case
the standard uses the term 'shall'. But for those functions that have a more limited application the term 'may' is
used. To allow this, all of the requirements relating to each optional feature are gathered together under the
same clause or subclause.
Experience with EN 54:1997 showed that some of the requirements were open to misinterpretation.
TC 72/WG 7 has therefore tried to rephrase the requirements very carefully to ensure that the intent of each
requirement is very clear. It may be necessary to modify some equipment that was certified as compliant with
the original standard, where misinterpretations have been applied. However the intention of the committee
was not to introduce significant technical changes to core requirements, although some new optional features
have been added to meet current practice in some applications.
In order to make the standard easier to read, abbreviations are used when referencing other functions of the
fire alarm system, these are defined in Clause 3.
EN 54-13 currently contains requirements for safe operation of the fire system when partial open and partial
short circuits are applied to transmission paths. This means that a compliant EN 54-2 panel might not comply
with EN 54-13. This is clearly undesirable so an optional clause for this is now included in EN 54-2.
Where a minimum performance is required in part 2, for example the time to respond to a fire signal from a
manual call point, it is now allowed for a manufacturer to declare a better response, so long as the equipment
actually achieves the better performance. This might be required by certain national codes.
As with EN 54-2:1997 annexes are used to deal with specific subjects, informative annexes give information
which is intended to help the reader understand the objectives of the standards. Some annexes, e.g Annex ZA
are required to comply with the CPR.
It is important not to read into the standard things which are not there. For example the audible indication is
not intended to be the same as the output to C. The current structure of the standard should make this more
clear because all of the requirements for a specific option are contained in the same section, under the same
heading in the standard.
Some clarification has been made to the requirements relating to a System Fault. This is a special type of fault
where the requirements are different to general faults, particularly with respect to entering the fault warning
condition.
The test requirements for environmental tests now refer to EN 50130-5, and the format of EMC test
requirements referring to EN 50130-4 are now treated in a similar way, that is each test type is separately
specified.
Some changes have been made to the display requirements for disablements to addressable alarm devices,
output to C. This is to correct an error that was unintentionally introduced in a previous amendment.
EN 54, Fire detection and fire alarm systems, consists of the following parts:
— Part 1: Introduction;
— Part 2: Control and indicating equipment;
— Part 3: Fire alarm devices — Sounders;
— Part 4: Power supply equipment;
— Part 5: Heat detectors — Point detectors;
— Part 7: Smoke detectors — Point detectors using scattered light, transmitted light or ionization;
— Part 10: Flame detectors — Point detectors;
— Part 11: Manual call points;
— Part 12: Smoke detectors — Line detectors using an optical beam;
— Part 13: Compatibility assessment of system components;
— Part 14: Guidelines for planning, design, installation, commissioning, use and maintenance [CEN Technical
Specification];
— Part 16: Voice alarm control and indicating equipment;
— Part 17: Short circuit isolators;
— Part 18: Input/output devices;
— Part 20: Aspirating smoke detectors;
— Part 21: Alarm transmission and fault warning routing equipment;
— Part 22: Resettable line-type heat detectors;
— Part 23: Fire alarm devices — Visual alarms devices;
— Part 24: Components of voice alarm systems — Loudspeakers;
— Part 25: Components using radio links;
— Part 26: Carbon monoxide detectors — Point detectors;
— Part 27: Duct smoke detectors;
— Part 28: Non-resettable line type heat detectors [currently at voting stage];
— Part 29: Multi-sensor fire detectors — Point detectors using a combination of smoke and heat sensors;
— Part 30: Multi-sensor fire detectors — Point detectors using a combination of carbon monoxide and heat
sensors;
— Part 31: Multi-sensor fire detectors — Point detectors using a combination of smoke, carbon monoxide and
optionally heat sensors;
— Part 32: Planning, design, installation, commissioning, use and maintenance of voice alarm systems [CEN
Technical Specification].
NOTE This list includes standards that are in preparation and other standards may be added. For current status of
.
published standards refer to www.cen.eu
Introduction
This part of EN 54 is drafted on the basis of a set of core requirements for operational reliability (under 4.2.1),
plus a number of free-standing additional requirements for operational reliability (under 4.2.2 to 4.2.16). It is
expected that the core requirements under 4.2.1 would apply to all control and indicating equipment, together
with the requirements for durability under 4.3 and 4.4. Each set of additional requirements may be separately
provided for use in specific applications, as recommended in application guidelines, in order to permit control
and indicating equipment with many different combinations of functions to comply with this draft European
Standard.
Other functions associated with fire detection and fire alarm may also be provided, even if not specified in this
draft European Standard.
1 Scope
This draft European Standard specifies requirements, methods of test, and performance criteria for control and
indicating equipment (CIE) (see EN 54-1:2011, Figure 1, function B) for use in fire detection and fire alarm
systems installed in and around buildings.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 54 (all parts), Fire detection and fire alarm systems
EN 54-1:2011, Fire detection and fire alarm systems — Part 1: Introduction
1)
EN 54-4:1997 , Fire detection and fire alarm systems — Part 4: Power supply equipment
EN 50130-4:2011, 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 50130-5:2011, Alarm systems — Part 5: Environmental test methods
2)
EN 60529 , Degrees of protection provided by enclosures (IP code) (IEC 60529)
EN 60721-3-3, Classification of environmental conditions — Part 3: Classification of groups of environmental
parameters and their severities — Section 3: Stationary use at weatherprotected locations (IEC 60721-3-3)
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 54-1:2011 and the following apply.
3.1.1
access level
state of the CIE at which selected controls may be operated, or indications viewed (see Annex B)
3.1.2
addressable device
device that can be individually identified at the CIE
3.1.3
information display
visible indicator that is capable of giving information consisting of text, numeric characters, graphical symbols
or any combination thereof
3.1.4
confirmation alarm signal
signal from a fire detector or manual call point which terminates a first alarm state

1) EN 54-4:1997 is currently impacted by EN 54-4:1997/A1:2002 and EN 54-4:1997/A2:2006.
2) EN 60529:1991 is currently impacted by EN 60529:1991/A1:2000 and EN 60529:1991/A2:2013.
3.1.5
detachable component
component which comprises two or more parts where parts may be removed from the fixed part connected to
the transmission path without tools
3.1.6
disabled condition
functional condition when the disablement of functions is indicated
3.1.7
earth fault
unwanted connection between earth potential and any part of the CIE, transmission paths to the CIE, or
transmission paths between parts of the CIE
3.1.8
fault warning condition,
functional condition when a fault is indicated
3.1.9
field
sub-division of a window
3.1.10
fire alarm condition
functional condition when a fire alarm is indicated
3.1.11
first alarm signal
signal from a fire detector which is interpreted as a fire alarm, but following which the CIE enters a first alarm
state
3.1.12
first alarm state
state of the CIE following the receipt of a first alarm signal during which functions of the CIE may be inhibited
3.1.13
functional condition
state of the CIE characterized by indication(s)
3.1.14
indicator
device which can change its state to give information
3.1.15
quiescent condition
functional condition when the CIE is powered and fully operational and no other functional condition is
indicated
3.1.16
module
part of the program that fulfils specified functions
3.1.17
non-volatile memory
memory elements that do not require the presence of an energy source for the retention of their contents
3.1.18
program
software necessary for a CIE to comply with at least the requirements of this draft European Standard,
including initializing data, reset and interrupt vectors, operating code, and declarations
3.1.19
running data
alterable data subject to temporary modification during operation, either automatically or by manual controls
3.1.20
separate
physically separate, and exclusively provided for the purpose or purposes stated in this draft European
Standard
3.1.21
silencing
switching off the audible signal of a sounding device that is capable of being re-sounded by a new event
3.1.22
site specific data
alterable data required for the CIE to operate in a defined system configuration
3.1.23
test condition
functional condition when the testing of functions is indicated
3.1.24
volatile memory
memory elements that require the presence of an energy source for the retention of their contents
3.1.25
window
area of the information display, realized either by mechanical separation or under software control, that is used
for information relating to one functional condition at a given time
3.1.26
integrated PSE
PSE incorporated within other equipment, which supplies power to that equipment and may have one or more
outputs to power external equipment
3.2 Abbreviations
For the purposes of this document, the abbreviations given in EN 54-1:2011 and the following apply.
AL1 access level 1
AL2 access level 2
AL3 access level 3
AL4 access level 4
A EN 54–1:2001 automatic fire detection function
C EN 54–1:2011 fire alarm function
D EN 54–1:2011 manual initiating function
E EN 54–1:2011 fire alarm routing function
G EN 54–1:2011 control function for fire protection system or equipment
J EN 54–1:2011 fault warning routing function
L EN 54–1:2011 power supply function
M EN 54–1:2011 control and indication function for alarm annunciation
N EN 54–1:2011 ancillary input or output function

4 Requirements
4.1 Compliance
In order to comply with this standard, CIE shall meet the requirements of this clause, which shall be verified by
visual inspection or engineering assessment and shall be tested as described in Clause 5 and shall meet the
requirements of the tests.
4.2 Operational reliability
4.2.1 Functional conditions and related indications
4.2.1.1 Primary functions
4.2.1.1.1 The CIE shall be capable of unambiguously indicating the following functional conditions:
1) quiescent condition;
2) fire alarm condition;
3) fault warning condition;
4) disablement condition;
5) test condition, if provided.
4.2.1.1.2 The CIE shall be capable of being simultaneously in any combination of the following functional
conditions:
1) fire alarm condition;
2) fault warning condition;
3) disablement condition;
4) test condition, if provided.
4.2.1.1.3 All indications shall be clearly identifiable, except where otherwise specified in this draft European
Standard.
4.2.1.1.4 Indications shall not be falsified by showing incorrect information.
4.2.1.1.5 Where light emitting indicators and an information display are both provided, at least one of these
means shall meet the requirements for each indication in this draft European Standard. The other means may
give supplementary information.
4.2.1.1.6 Where an information display is used to display indications relating to different functional
conditions these may be displayed at the same time. However, for each functional condition there shall be only
one window, in which all of the fields relating to that functional condition are grouped.
4.2.1.1.7 A visible indication shall be given by means of a separate light emitting indicator, a fixed light
emitting element on an information display, or both while the CIE is supplied with power.
4.2.1.1.8 Where indications are used in addition to those required in this standard these shall not result in
contradiction or confusion.
4.2.1.1.9 If functions other than those specified in this draft European Standard are provided they shall not
jeopardize compliance with any requirements of this draft European Standard.
4.2.1.2 Fire alarm condition
4.2.1.2.1 Reception and processing of fire signals (see also Annex C)
4.2.1.2.1.1 The CIE shall enter the fire alarm condition when signals are received which after any necessary
processing are interpreted as a fire alarm.
4.2.1.2.1.2 The CIE shall be capable of receiving, processing and indicating signals from all zones. A signal
from one zone shall not falsify the processing, storing and indication of signals from other zones.
4.2.1.2.1.3 Unless 4.2.8 applies, the time taken by scanning, interrogation, or other processing of signals
from fire detectors, in addition to that required to take the fire alarm decision, shall not delay the entry to the
fire alarm condition with its indication, or the indication of a new zone in alarm, by more than 10 s.
4.2.1.2.1.4 The CIE shall enter the fire alarm condition within 10 s of the activation of any manual call
point. The manufacturer may specify a time shorter than 10 s. In this case, this specification shall be tested and
verified.
4.2.1.2.1.5 The indications and outputs shall not be falsified by multiple fire signals received from fire
detectors, manual call points or input devices, from the same or different transmission paths, resulting from:
1) the simultaneous reception of two signals followed by the reception of a further signal;
2) the sequential reception of more than one signal.
4.2.1.2.2 Indication of the fire alarm condition
The fire alarm condition shall be indicated without prior manual intervention. The indication is established
when all of the following are present:
1) a visible indication, (the general fire alarm indication) by means of a separate light emitting indicator, a
fixed light emitting element on an information display, or both;
2) a visible indication, as specified in 4.2.1.2.3, of the zones in alarm, which may be omitted for CIE capable of
receiving signals from only one zone;
3) an audible indication, as specified in 4.2.1.2.4.
4.2.1.2.3 Indication of the zones in alarm (see also Annex D)
4.2.1.2.3.1 The zones in alarm shall be visibly indicated by means of one or both of the following:
1) a separate light emitting indicator for each zone;
2) an alarm window in an information display.
4.2.1.2.3.2 If the zonal indications are on an information display, which cannot simultaneously indicate all
the zones in alarm because of its limited capacity, at least the following shall apply.
a) The first zone in alarm shall be displayed in a field at the top of the alarm window.
b) If there is more than one zone in alarm, the most recent zone in alarm shall be permanently displayed in
another defined field.
c) If there is more than one zone in alarm, the total number of zones in alarm shall be displayed.
d) Zones in alarm, but not currently indicated, shall be capable of being displayed at AL1. A single manual
action shall be required for the display of each additional zone in alarm. Either individual fields, or the
whole alarm window, may be temporarily suppressed to permit the display of additional zones in alarm.
However, the display shall meet the requirements of 4.2.1.2.3.2 a) to c) within 30 s following the last
interrogation.
4.2.1.2.4 Audible indication
4.2.1.2.4.1 The audible indication for the fire alarm condition may be the same as that for the fault warning
condition. If they are different, the fire alarm indication shall have priority.
4.2.1.2.4.2 The audible indication shall be capable of being silenced by means of a separate manual control
at AL1 or AL2. This control shall only be used for silencing the audible indication, and may be the same as that
used for silencing in the fault warning condition.
The silencing of the audible indication may be accompanied by changes in the visible indications of fire or fault,
provided that the required indication of functional conditions is still provided (e.g. the indication of light
emitting indicators may change from flashing to steady, or the information given on an information display may
be updated).
4.2.1.2.4.3 The audible indication shall not be silenced automatically.
4.2.1.2.4.4 The audible indication shall re-sound for each new zone in alarm.
4.2.1.2.5 Other indications during the fire alarm condition
4.2.1.2.5.1 If faults, disablements or tests are indicated by means of one or more light emitting indicators,
and such indications are suppressed during the fire alarm condition, it shall be possible to reveal these by
means of a manual operation at AL1 or AL2.
4.2.1.2.5.2 If the fire alarm indications are on an information display, the following shall apply to the
display of other information on the information display.
a) Information not related to the fire alarm condition shall be suppressed, unless the information display has
more than one window, one of which is exclusively reserved for fire alarm indications.
b) Suppressed indications of faults, disablements and tests shall be capable of being displayed, at any time, by
manual operations at AL1 or AL2, which are different from, or additional to that specified in 4.2.1.2.3.2 d)
to display zones in fire alarm, and which are capable of displaying faults, disablements and
...