SIST EN 50134-3:2001
(Main)Alarm systems - Social alarm systems -- Part 3: Local unit and controller
Alarm systems - Social alarm systems -- Part 3: Local unit and controller
This standard specifies the requirements and tests for local units and controllers forming part of a social alarm system.
This standard applies to local units and controllers that receive an alarm triggering signal from manually or automatically activated trigger devices and convert this into an alarm signal for transmission to the alarm receiving centre or an alarm recipient.
The local unit and controller are either separate units or integrated into one unit.
This standard does not specify EMC emission or electrical safety requirements. These are covered by other standards.
Alarmanlagen - Personen-Hilferufanlagen -- Teil 3: Örtliche Zentrale und Steuereinrichtung
Systèmes d'alarme - Systèmes d'alarme sociale -- Partie 3: Unité locale et contrôleur
La présente norme spécifie les exigences et les essais destinés aux unités locales et aux contrôleurs constituant une partie d’un système d’alarme sociale.
La présente norme s’applique aux unités locales et aux contrôleurs recevant un signal de déclenchement d’alarme provenant d’un déclencheur activé manuellement ou automatiquement, et convertissant ce signal en un signal d’alarme destiné à un centre de réception d’alarme ou au destinataire de l’alarme.
L’unité locale et le contrôleur sont des unités distinctes ou intégrées en une seule unité.
Cette norme ne spécifie pas les exigences en matières d’émission CEM, ni de sécurité électrique. Ces exigences sont couvertes par d’autres normes.
Alarmni sistemi - Socialni alarmni sistemi - 3. del: Lokalna enota in krmilnik
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50134-3:2001
01-november-2001
Alarmni sistemi - Socialni alarmni sistemi - 3. del: Lokalna enota in krmilnik
Alarm systems - Social alarm systems -- Part 3: Local unit and controller
Alarmanlagen - Personen-Hilferufanlagen -- Teil 3: Örtliche Zentrale und
Steuereinrichtung
Systèmes d'alarme - Systèmes d'alarme sociale -- Partie 3: Unité locale et contrôleur
Ta slovenski standard je istoveten z: EN 50134-3:2001
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
SIST EN 50134-3:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 50134-3:2001
---------------------- Page: 2 ----------------------
SIST EN 50134-3:2001
EUROPEAN STANDARD EN 50134-3
NORME EUROPÉENNE
EUROPÄISCHE NORM August 2001
ICS 13.320
English version
Alarm systems -
Social alarm systems
Part 3: Local unit and controller
Systèmes d'alarme - Alarmanlagen -
Systèmes d'alarme sociale Personen-Hilferufanlagen
Partie 3: Unité locale et contrôleur Teil 3: Örtliche Zentrale und
Steuereinrichtung
This European Standard was approved by CENELEC on 2000-04-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50134-3:2001 E
---------------------- Page: 3 ----------------------
SIST EN 50134-3:2001
EN 50134-3:2001 - 2 -
Foreword
This European Standard was prepared by the CENELEC Technical Committee 79 : Alarm
systems.
The text of the draft was submitted to the formal vote and was approved by CENELEC as
EN 50134-3 on 2000-04-01.
The following dates were fixed :
- latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2002-02-01
- latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2003-04-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annexes A and B are normative.
EN 50134 will consist of the following parts, under the general title “Alarm systems - Social
alarm systems :
- Part 1 System requirements,
- Part 2 Trigger devices,
- Part 3 Local unit and controller,
- Part 4 (free),
- Part 5 Interconnections and communications,
- Part 6 (free),
- Part 7 Application guidelines.
---------------------- Page: 4 ----------------------
SIST EN 50134-3:2001
- 3 - EN 50134-3:2001
Contents
Page
Introduction.4
1 Scope.4
2 Normative references.4
3 Definitions.5
4 Functional requirements .6
4.1 General .6
4.2 Detailed functional requirements.7
5 Tests.15
5.1 Test categories .15
5.2 Standard atmospheric condition for testing.15
5.3 Number of local unit and controllers used for testing .15
5.4 General conditions for tests.15
5.5 Functional tests.16
5.6 Wire-free radio interconnections measurements .18
5.7 Environmental tests .19
6 Marking .28
6.1 Information to be included in the marking.28
6.2 Requirements for the marking.28
7 Documentation .28
Annex A (normative) Function, indication and timing of a local unit and controller
in relation to an alarm triggering signal .29
Annex B (normative) Test set-up by using radio-frequency shielded test fixtures .30
---------------------- Page: 5 ----------------------
SIST EN 50134-3:2001
EN 50134-3:2001 - 4 -
Introduction
Since malfunctions in local units and controllers may involve the risk of human life, it is
essential that the technical quality and reliability of such equipment should be higher than that
normally required for consumer electronics.
The design should also take into consideration situations where the user may be unable to
send an alarm, or where an unwanted alarm may be sent, due to technical malfunctions or
poor ergonomic design.
1 Scope
This standard specifies the requirements and tests for local units and controllers forming part
of a social alarm system.
This standard applies to local units and controllers that receive an alarm triggering signal from
manually or automatically activated trigger devices and convert this into an alarm signal for
transmission to the alarm receiving centre or an alarm recipient.
The local unit and controller are either separate units or integrated into one unit.
This standard does not specify EMC emission or electrical safety requirements. These are
covered by other standards.
2 Normative references
This European Standard incorporates, by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and
the publications are listed hereafter. For dated references, subsequent amendments to or
revisions of any of these publications apply to this European Standard only when incorporated
in it by amendment or revision. For undated references the latest edition of the publication
referred to applies.
EN 50130-4 1995 Alarm systems – Part 4: Electromagnetic compatibility – Product
+ A1 1998 family standard : Immunity requirements for components of fire,
intruder and social alarm systems
EN 50130-5 1998 Alarm systems – Part 5: Environmental test methods
EN 50134-2 1999 Alarm systems - Social alarm systems – Part 2: Trigger devices
EN 60529 1991 Degrees of protection provided by enclosures (IP code)
+ corr. May 1993 (IEC 60529:1989)
EN 60068-1 1994 Environmental testing – Part 1: General and guidance
(IEC 60068-1:1988 + corrigendum Oct. 1988 + A1:1992)
ETS 300 113 1996 Radio Equipment and Systems (RES);Land mobile service;Technical
characteristics and test conditions for radio equipment intended for
the transmission of data (and speech) and having an antenna
connector
---------------------- Page: 6 ----------------------
SIST EN 50134-3:2001
- 5 - EN 50134-3:2001
3 Definitions
For the purposes of this standard, the following definitions apply :
3.1
social alarm system
system providing 24 h facilities for alarm triggering, identification, signal transmission, alarm
reception, two-way speech communication, reassurance and assistance, for use by persons
who can be considered to be living at home at risk
3.2
alarm receiving centre (ARC)
system part which provides facilities for communication with a number of controllers, and
providing the alarm receiving and information processing system as an interface to the alarm
recipient
3.3
local unit
interface between the user and the controller which enables two-way speech
3.4
controller
interface between one or more local units and the alarm transmission system or alarm
recipient
3.5
trigger device
system part, operated by a person or automatically that communicates to the local unit and
controller, initiating the alarm triggering signal
3.6
fixed trigger device
trigger device in a fixed position in relation to the local unit or building
3.7
portable trigger device
trigger device carried by the user and providing wire-free communication
3.8
activity monitoring trigger device
alarm device that operates automatically when a routine activity of the user, being monitored
by a trigger device, is modified within a specified period
3.9
interconnections
transmission system that provides the communication between trigger devices and local unit
and controller
3.10
alarm transmission system
transmission system that provides communication between the controller and the alarm
receiving centre or an alarm recipient
3.11
normal condition
condition during which the system is fully operational and is not in any other condition
3.12
pre-alarm condition
condition following the reception of an alarm triggering signal
---------------------- Page: 7 ----------------------
SIST EN 50134-3:2001
EN 50134-3:2001 - 6 -
3.13
alarm condition
condition following the pre-alarm condition
3.14
fault condition
condition following detection of a fault by the local unit and controller, that prevents the
functioning of the system
3.15
disconnection condition
temporary and deliberate disconnection of a local unit to prevent alarm or fault transmission
to the controller or the alarm receiving centre
3.16
reassurance indication
indication provided locally in alarm condition in order to verify to the user that the local unit
has received the alarm triggering signal
3.17
fault indication
indication of a fault condition
3.18
pre-alarm warning indication
indication at the local unit that the local unit is in the pre-alarm condition
3.19
disconnection indication*
indication of the disconnection condition
3.20
alarm triggering signal
signal transmitted by a trigger device to indicate an alarm
3.21
reset
return of the alarm system to the normal condition
3.22
alarm recipient
person who receives and acts upon an alarm signal
3.23
user
person living at home at risk.
4 Functional requirements
4.1 General
a) Unless otherwise noted the requirements of this standard are the same for a local unit and
a controller.
b) If an optional function is implemented the related requirement shall be fulfilled.
c) The local unit and controller shall be protected against environmental influences by a box
or a cabinet of suitable mechanically strength, which shall be classified to at least IP30 as
specified in EN 60529.
NOTE 1 If the controller is installed in a separate protected and locked room, the requirement is not applicable.
---------------------- Page: 8 ----------------------
SIST EN 50134-3:2001
- 7 - EN 50134-3:2001
d) All mandatory manual controls and visual indications for a local unit or combined local unit
and controller shall be contained in one mechanical unit and their purpose shall be clearly
indicated.
NOTE 2 If the controller is a separate unit all manual controls and visual indications related to the function or
facility of the controller may be contained in the separate controller.
4.2 Detailed functional requirements
The functions of a local unit and controller are divided into the following groups :
• inputs,
• signal processing,
• indications,
• operating controls,
• outputs for external indications or controls (optional),
• interconnections,
• alarm transmission.
4.2.1 Inputs
4.2.1.1 Input signals from trigger devices
a) The input signals from trigger devices are transmitted to the local unit and controller via
cable and/or wire-free radio transmission.
Such signals shall be stored in the local unit and controller, and indicated locally and/or
transmitted to the alarm receiving centre or an alarm recipient in accordance with the
functional requirements of this standard.
b) The wire-free radio receiver in the local unit and controller (if a receiver is available in the
controller) and the associated transmitter type of trigger device shall fulfil the requirements
of the local countries appropriate radio regulatory requirements.
4.2.1.2 Primary supply input
a) If a local unit or controller is mains powered it shall have an indication of sufficient mains
power, or an indication of the lack of sufficient mains power.
b) If the primary source of power is a battery, it shall be capable of supplying power to the
local unit and controller for a minimum of 12 months of normal operation, including a
minimum of one alarm transmission and two-way-speech communication per day for a
minimum of 1 min. Additionally the local unit and controller shall be capable of indicating a
battery low fault warning signal at the local unit and controller, and transmitting it to the
alarm receiving centre or an alarm recipient automatically for a minimum of seven days.
c) If a controller is powered from the alarm transmission system it shall have an indication of
sufficient power or an indication of the lack of sufficient power.
---------------------- Page: 9 ----------------------
SIST EN 50134-3:2001
EN 50134-3:2001 - 8 -
4.2.1.3 Secondary supply input
If the primary power source is mains power according to 4.2.1.2 a) or the alarm transmission
system according to 4.2.1.2 c) the following applies :
a) In case of failure of the primary power source, power to the local unit and controller shall
be maintained by a secondary power source. The secondary power source shall be
capable of supplying power to the local unit and controller for a minimum of 8 hs in normal
condition, including a minimum of half an h of alarm condition during which alarm
transmission and two-way speech communication occurs.
b) If the primary power source is the mains there must be no power taken from the secondary
power source when the local unit and controller is in the normal condition except for
battery monitoring purposes. The requirement applies with the allowed variations of the
mains.
c) If the primary power source is interrupted the local unit and controller shall automatically
be switched to the secondary power source without any interruptions to the operation of
the device.
d) If the secondary supply input is a rechargeable battery a fully discharged battery shall be
recharged to a minimum of 80 % of its nominal capacity within 24 h and to its rated
capacity within another 48 h.
4.2.1.4 User speech input
a) There shall be a two-way speech communication facility between the user and the alarm
recipient.
b) The two-way speech communication between the user and the local unit shall be hands-
free.
4.2.2 Signal processing
a) The signal processing of an alarm triggering signal shall comply with the requirements to
function, indication and timing as shown in the diagram of annex A and described in
4.2.2.1 and 4.2.2.2.
b) If a manually selectable condition can inhibit the sending of an alarm signal it shall not be
possible to select this condition without the use of a tool, key or code.
c) In the event of more than one signal, none of the signals that have not already been
processed shall be lost.
d) Mandatory alarm and fault signals shall have priority over non-mandatory alarm and fault
signals.
e) Alarm signals shall have priority over all other signals.
4.2.2.1 Pre-alarm condition (optional)
a) The indication of the pre-alarm condition shall be given and cancellation of the pre-alarm
warning signal shall be possible in accordance with 4.2.3.1 and 4.2.4.2 respectively.
b) The pre-alarm condition shall be initiated after the reception of an alarm triggering signal.
---------------------- Page: 10 ----------------------
SIST EN 50134-3:2001
- 9 - EN 50134-3:2001
c) If this condition is not cancelled within the pre-alarm condition period the local unit and
controller shall change its state to the alarm condition in accordance with 4.2.2.2 b).
d) During pre-alarm condition an audible and/or visible pre-alarm warning indication shall be
given locally in accordance with 4.2.3.1.
4.2.2.2 Alarm condition
a) If the pre-alarm function is not implemented, the alarm condition shall be initiated not more
than 10 s after the trigger device has been manually- activated by the user.
b) If pre-alarm condition is implemented, the alarm condition shall be initiated not more than
10 s after the pre-alarm condition period has elapsed.
c) During the alarm condition the local unit and controller shall :
1) automatically initiate the alarm transmission system to transmit the alarm signal to the
alarm receiving centre or an alarm recipient,
2) give audible and/or visible indications locally as a reassurance signal in accordance
with 4.2.3.2,
3) provide a two-way speech communication which confirms to the user that the alarm
signal from a manually-activated trigger device has been received by the alarm
receiving centre or an alarm recipient,
4) distinguish between manual and automatic alarm trigger signals and transmit a coded
signal to the alarm receiving centre or an alarm recipient.
d) The alarm condition shall be reset from the alarm receiving centre or by an alarm recipient
or it shall be manually reset on the local unit and controller.
4.2.2.3 Fault condition
a) Types of fault
The local unit and controller shall detect and distinguish the following faults :
Type A : Fault in the primary power source ;
Type B : Discharge of any battery (primary or secondary source of power) below the
battery low voltage level as specified by the manufacturer ;
Type C : Battery low warning signal received from fixed or portable trigger devices ;
Type D : Disconnections or short circuits of the cable interconnections between a
fixed trigger device and the local unit and controller ;
NOTE The fault in the interconnections may be indicated and transmitted to the alarm receiving centre or an
alarm recipient as an alarm signal if it is not possible to distinguish between a fault and an alarm condition.
Type E : Fault in the cable interconnections which prevents the local unit and
controller from meeting the requirements of this standard ;
Type F : The presence of a continuous radio signal for a minimum of 30 s that may
inhibit the reception of an alarm triggering signal from a trigger device ;
---------------------- Page: 11 ----------------------
SIST EN 50134-3:2001
EN 50134-3:2001 - 10 -
Type G : Disconnection of the controller from the alarm transmission system for a
minimum of 60 s. A fault type G shall be indicated within the time specified
in Table 1.
b) Time intervals
The time intervals -from the time the fault occurs, and until it is indicated locally or
transmission to the alarm receiving centre or an alarm recipient has been initiated- shall be in
accordance with the requirements of Table 1.
Table 1 - Permissible time intervals by different types of fault
Type of fault T T
F1 F2
A 1 h to 3 h ≤ 10 s
B N/A
≤ 120 s
C ≤ (T + 120) s N/A
PAC
D ≤ (T + 120) s N/A
PAC
E
≤ 120 s ≤ 10 s
F
≤ 120 s ≤ 10 s
G N/A ≤ 10 s
Abbreviations :
T : Permissible time interval between the occurance of fault condition and until
F1
initiation of the alarm transmission system for transmission of the fault to the alarm
receiving centre or an alarm recipient occurs.
T : Permissible time interval between the occurance of fault condition and until
F2
local indication occurs.
T : Pre-alarm condition period in s.
PAC
N/A : Not applicable.
c) Detailed requirements
The local unit and controller shall provide :
1) Transmission of a signal dedicated to a fault type C, to the alarm receiving centre or an
alarm recipient.
2) Transmission of other faults by a minimum of a common fault signal to the alarm
receiving centre or an alarm recipient.
3) Audible and/or visible indication locally of the types of fault in accordance with 4.2.3.3.
4) A fault signal until logging has taken place at the alarm receiving centre or with an
alarm recipient, and/or until the service personnel have identified the type of failure
even though the cause of the fault has ceased.
---------------------- Page: 12 ----------------------
SIST EN 50134-3:2001
- 11 - EN 50134-3:2001
4.2.2.4 Disconnection condition (optional)
a) Types of disconnection
If disconnections are possible either by operation locally or by remote control from the alarm
receiving centre or an alarm recipient, the local unit and controller shall enter the
disconnection condition if any of the following are disconnected :
• one or more manually-activated trigger devices,
• one or more automatically activated trigger devices,
• the interconnections,
• the alarm transmission system.
b) Detailed requirements
During the disconnection condition the local unit and controller shall include :
1) Transmission of a disconnection signal to the alarm receiving centre or an alarm
recipient where possible. Where this is not possible it shall be indicated locally.
2) Maintenance of the disconnection condition until logging has taken place at the alarm
receiving centre or by an alarm recipient and until the user or the service personnel
have re-established the device or function that was disconnected.
3) Audible and/or visible indication in accordance with 4.2.3.4.
4.2.3 Indications
All indications shall be clearly distinguishable.
4.2.3.1 Pre-alarm warning indication (optional)
a) Local warning indication
During the pre-alarm condition, if implemented, the local unit and controller shall give a local
warning signal to indicate that an alarm signal will be transmitted to the alarm receiving centre
or an alarm recipient if the condition is not cancelled within the pre-alarm condition period.
b) Audible and/or visible indication
1) The pre-alarm warning indication shall be given by means of audible and/or visible
indicators on the local unit and controller, or by output facilities for presentation of the
pre-alarm warning signal on external indication devices.
2) The audible indication shall be in accordance with 4.2.3.5.
3) The audible and/or visible indication shall continue as long as the pre-alarm condition
exists.
4.2.3.2 Reassurance indication
a) Local reassurance indication
During the alarm condition period the local unit and controller shall give a reassurance signal
to indicate that the system has responded locally and that the alarm transmission from the
local unit and controller is initiated.
---------------------- Page: 13 ----------------------
SIST EN 50134-3:2001
EN 50134-3:2001 - 12 -
b) Detailed requirements
The reassurance signal shall comply with the following :
1) It shall be given by means of audible and/or visible indicators at the local unit, or by
output facilities for presentation of the reassurance signal on external indication
devices.
2) It shall automatically be initiated when the alarm condition period starts and it shall
remain until the two-way speech communication is initiated as a confirmation to the user
that the alarm signal has been received by the alarm receiving centre or an alarm
recipient.
3) The audible indication shall be in accordance with 4.2.3.5.
4) It shall continue as long as the alarm condition exists i.e. until the two-way speech
channel is opened.
5) For a reassurance signal in relation to an alarm triggering signal received from an
automatically activated trigger device a facility shall exist to disable this signal.
4.2.3.3 Fault indication
During fault condition the fault indication signal shall comply with the following :
a) The type of faults indicated locally and the time interval between occurrence of the fault
condition and until local indication occurs shall comply with Table 1.
b) The different types of faults, as described in 4.2.2.3.a) shall be indicated on the local unit
and/or controller according to Table 2.
Table 2 - Fault indications on the local unit and/or controller
Type of fault
Fault indications
AE F G
Fault indications on the local unit if the local unit is not +*
an integral part of the controller.
Fault indications on the controller if the local unit is +++ +
not an integral part of the controller.
Fault indications on the local unit and controller if the+++
local unit is an integral part of the controller.
*Only the faults in the primary power source of the local unit shall be indicated.
c) It shall be given by means of audible and/or visible indicators at the local unit and
controller, or by output facilities for presentation of the fault signal on external indication
devices.
d) It shall automatically be initiated when the fault condition period starts and it shall last until
a confirmation signal has been received from the alarm receiving centre or an alarm
recipient.
e) The audible indication shall be in accordance with 4.2.3.5.
---------------------- Page: 14 ----------------------
SIST EN 50134-3:2001
- 13 - EN 50134-3:2001
4.2.3.4 Disconnection indication (optional)
During disconnection condition, if implemented, the disconnection indication shall comply with
the following :
a) It shall be given by means of audible and/or visible indicators at the local unit and
controller, or by output facilities for presentation of the disconnection signal on external
indication devices.
b) The audible indication shall be in accordance with 4.2.3.5.
4.2.3.5 Audible indication
The peak sound level of the audible indication shall be a minimum of 65 dB(A) measured at a
distance of 1 m from the indication device. The audible signal shall consist of one or more
tones with a minimum duration of 150 ms within the frequency range 0,3 kHz to 3,4 kHz.
4.2.4 Operating controls
4.2.4.1 Manually-activated fixed trigger device
a) The local unit shall be provided with a built-in manually-activated fixed trigger device.
b) The fixed trigger device shall be physically distinguishable from all other controls.
c) The built-in manually-activated fixed trigger device shall be tested and fulfil the functional
requirements for the manually-activated push button type of fixed trigger device given in
EN 50134-2.
4.2.4.2 Cancel device (optional)
The local unit shall be provided with a facility to enable the user to cancel the alarm if the
optional pre-alarm function has been implemented. The device shall cancel the pre-alarm
condition and the pre-alarm warning signal during the pre-alarm condition period as described
in 4.2.2.1.
4.2.4.3 Power on/off switch (optional)
a) If a power on/off switch is fitted it shall not be accessible to the user, or shall be protected
against inadvertant operation.
b) The location and operation of the power on/off switch shall be specified in the installation
and service instructions given for the local unit and controller.
4.2.4.4 Manually operated loudspeaker volume control for two-way speech (optional)
If a manually operated loudspeaker volume control is fitted, it shall be protected against
accidental operation.
4.2.4.5 Privacy control
a) If the facility exists for the alarm recipient to call the user in a non-alarm situation, the call
shall be proceeded by an announcement signal.
---------------------- Page: 15 ----------------------
SIST EN 50134-3:2001
EN 50134-3:2001 - 14 -
b) The local unit and controller shall have a privacy control to allow the user to prevent the
alarm recipient from listening in.
c) The audible indication shall be in accordance with 4.2.3.5.
d) The announcement signal shall have a minimum duration of 1 s.
e) The privacy condition shall be overridden in case of an alarm condition.
4.2.5 Outputs for external indications or controls (optional)
If the local unit and controller provides outputs for external indications or controls, the
operation of these outputs shall not inhibit the functioning of the local unit and controller.
4.2.6 Interconnections
a) The time required for transmission between the local unit and a separate controller in case
of pre-alarm, alarm, or fault condition shall be included in the time intervals as specified in
4.2.2.1 to 4.2.2.3.
b) A fault type D or E shall be detected and indicated as described in 4.2.2.3 and 4.2.3.3.
c) Interconnection facilities for communication between a separate controller and one or more
local units shall include two-way speech.
4.2.7 Alarm transmission
a) The controller shall be capable of transmitting all mandatory alarm, fault or disconnection
condition signals.
b) There shall be a two-way speech facility (microphone, loudspeaker, amplifiers etc.) for
communication between the user and the alarm receiving centre or an alarm recipient
during an alarm condi
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.