Transcript EN 60849

TOA Electronics Europe GmbH presents:
VenaS
Main Requirements of
EN 60849
Sound Systems for
Emergency Purposes
V
Venas Definitions
VX-2000
A Few Definitions [3]

“Alarm
- a signal, or condition, warning of an emergency”
- e.g.: evacuation advice

“Warning
- important notice concerning any change of status which
demands attention or activity “
- e.g. hint that an emergency may happen

“Critical Signal Path
- all components and interconnections between every
emergency broadcast initiation point and the input terminals on,
or within, each loudspeaker enclosure.”
BMZ
Alarm tone
generator
~
~
amplifire
Line
Loudspeaker
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Background Design: Torsten Kranz
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Venas
VX-2000
Requirements on
the Apparatus’s
Concerning the manufacturer
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Background Design: Torsten Kranz
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Venas Operation Availability
VX-2000
Continuous Availability [4.1b]
The PA system shall be available all times
Availability within 10 seconds after supplying
power to the system [4.1c]
primary or secondary power
Maximum 3 Seconds from initiation until first
emergency broadcast [4.1d]
including reaction time of the detection system
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Background Design: Torsten Kranz
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Venas Emergency Priorities
VX-2000
[4.3]
Manual Alarming/Warning/Restoration
>
automatic Alarming (evacuation)
>
automatic Warning
>
no emergency: operational messages
(e.g. for system check)
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Background Design: Torsten Kranz
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Venas Manual Intervention
VX-2000
If the voice alarm system is capable of operation
in fully automatic mode, a manual intervention
shall always be possible [4.3.2]

starting and stopping of prerecorded alarm messages
[4.3.2a]

selection of appropriate prerecorded alarm messages
[4.3.2b]
- when using specific emergency messages, indication of which
message and their relation to zones must be displayed [5.2.d]


paging by using the emergency microphone (if any) [4.3.2d]
selection of zones for prerecorded message or paging
[4.3.2c]
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Background Design: Torsten Kranz
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Venas Automatic Status Indication
VX-2000
„A clear indication shall automatically be given
at the designated control locations of:“ [5.2]
(the designated control location can be the fireman‘s microphone)




“system availability“ [5.2 a]
“power supply availability “ [5.2 b]
“any fault condition“ [5.2 c]
systems with several zones: current message
broadcast into which zones:
Alert, Evacuation, paging
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Background Design: Torsten Kranz
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Venas Failure Indication (1)
VX-2000
Indication of Failures [5.3]




Failures must be indicated automatically at an
designated place (e.g. main system)
The failure shall be indicated within 100 seconds after
occurrence.
The failure shall be indicated acoustically and visually.
A receipt button and a Reset button must be available.
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Background Design: Torsten Kranz
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Venas Failure Indication (2)
VX-2000
Indication [5.3]

Visual and acoustic indication
- tone of 0.5 seconds duration, min. once within 5 seconds
- permanent or flashing visual indicator

Manual reception by personal
- tone disappears
- visual indicator remains / changes to permanent on

Reset of failure indication after failure recovery
- visual indicator extinguishes automatically
- or - visual indicator extinguishes after manual Reset
- visual indicator shall extinguish after failure recovery !

Acoustic tone must start again when other
failure detected
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Background Design: Torsten Kranz
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Venas Surveillance (1)
VX-2000
An automatic Surveillance must indicate each
detected failure
The surveillance system tests


Components of the “critical signal path “
(sources, amplifiers, cables etc.)
the power supply
- primary supply [5.3a]
- secondary supply [5.3b]
- battery charger [5.3c]

failure of protection circuits which may prevent the an
emergency broadcast
- e.g. fuse, circuit breaker, isolator [5.3d]

control circuits (processor etc.)
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Background Design: Torsten Kranz
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Venas Surveillance (2)
VX-2000
Failure of elements of the critical signal path

failure of microphone [5.3e]
- (voice coil, pre-amplifier, wiring)





failure of the critical signal path through amplifiers [5.3f]
missing of amplifiers or critical modules [5.3g]
failure of standby amplifier[5.3h]
failure of tone generator or message memory [5.3i]
failure of speaker circuits[5.3j]
- (short circuit, break)


failure of connection between decentralised systems [5.3 o]
failure of connection between PA system and
emergency detection system
- usually this surveillance is done by the emergency detection
system [5.5]
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Background Design: Torsten Kranz
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Venas Monitoring of the Microphone
VX-2000
Methods of Microphone Monitoring
electrical monitoring :

Disadvantage: conversion from sound to voltage can
not be monitored, e.g. when the diaphragm is damaged
Acoustic monitoring


a speaker send an acoustic signal to the capsule
the acoustic and electric function of the capsule is
monitored  very safe method !
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Background Design: Torsten Kranz
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Venas
Monitoring Speaker Circuits (1)
VX-2000
1. Impedance Monitoring (used often)
audio
+
pilot tone
(low frequency)
impedance
measuring
- connection of different 100 volts speakers possible
- star wiring possible
- expansion of old systems possible
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Background Design: Torsten Kranz
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Venas
Monitoring Speaker Circuits (2)
VX-2000
2. Loop Back
audio
+
test signal
(high frequency)
pilot tone detector
- connection of different 100 volts speakers possible
- line must be installed from speaker to speaker
- line back necessary
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Background Design: Torsten Kranz
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Venas
Monitoring Speaker Circuits (4)
VX-2000
3. End-of-Line Check
end of
line unit
EOL
audio
+
pilot tone
(high frequency)
pilot tone detector, EOL receiver
- connection of different 100 volts speakers possible
- only single line back necessary (third wire of shield can
be used if available)
- line must be installed from speaker to speaker
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Background Design: Torsten Kranz
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Venas Evacuation Message Memory
VX-2000
Safety Against External Influence
Prerecorded messages and eventually attentiondrawing signals



must be stored in a non-volatile memory (solid state
memory, no mechanical devices) [4.2i]
availability must be monitored continuously
external sources shall not be able to corrupt or derange
the store or its contents
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Background Design: Torsten Kranz
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Venas
VX-2000
Requirements On
The Installation
concerning the installer
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Background Design: Torsten Kranz
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Venas
VX-2000
Interface With
Emergency Detection System [5.5]
Continuous Monitoring

The communication link between the emergency
detection system and the sound system is normally
monitored by the emergency detection system
Notifications to the Emergency Detection System

The sound system must transfer minimum one fault
information (any failure)to the emergency detection
system
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Background Design: Torsten Kranz
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Venas Retaining Functions
VX-2000
Redundant Facilities
Retaining the Power [4.1m]

an emergency power supply must be installed always
Retaining the Broadcast [4.1g]

„Failure of a single amplifier or loudspeaker circuit shall
not result in total loss of coverage in the loudspeaker area
served.”
- architecture of the speaker circuit
- configuration power amplifiers

Exception: regional directives for small buildings
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Background Design: Torsten Kranz
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Venas Emergency Power Supply
VX-2000
Battery’s Capacity [5.6]

Loss of AC mains at evacuation:
- double evacuation time
- minimum 30 minutes for emergency mode

Loss of AC mains without evacuation :
- minimum 24 hours (normal operation)
- When a building is not used for a longer period (e.g.
weekend), then the system must be capable to operate
the emergency mode for minimum 30 minutes after reoccupation of the building
(e.g. 72 hours standby plus 30 minutes emergency mode)
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Background Design: Torsten Kranz
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Venas Retaining of Broadcast (1)
VX-2000
Electrical Solution: A/B-Wiring
Two-Line System

In case of failure of one line, the other line still serves the remaining
speakers
A
B
A/B-wiring with 2 amplifiers
A/B-wiring with standby amplifier
standby switch
line cut switch
standby amplifier
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Background Design: Torsten Kranz
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Venas Retaining of Broadcast (2)
VX-2000
Acoustic Solution:


Connection of speakers by
turns on the lines A and B in
each direction
In case of a line’s failure, the
speaker area keeps served
adequate (small gaps of
coverage only)
Example: wide area
A
B
A
Example: corridor
B
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Background Design: Torsten Kranz
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Venas Sound Pressure Level
VX-2000
Attention-Drawing Signals [Annex C]




minimum: 65 dBA,
in rest areas: 75 dBA
6 - 20 dBA above
background noise
maximum: 120 dBA
the sound pressure levels
of all relevant areas must
be confirmed and being
documented [7.2 a]
sound pressure level
120 dBA
z.B. 100 dBA
z.B. 90 dBA
75 dBA
65 dBA
maximum
level of att. drawing
6 - 20 dBA
background noise
minimum rest areas
minimum
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Background Design: Torsten Kranz
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Venas Intelligibility
VX-2000
Intelligibility of Messages



The Intelligibility of messages must be equal or higher
than 0.7 CIS (common intelligibility scale; STI: 0,5) [5.1]
This value must be obtained in each area [5.1]
In a difficult acoustic environment, it is preferable to
carry out an acoustical simulation
Measuring and Documentation of Intelligibility




Confirmation of intelligibility must be documented [7.2 a]
Application of acknowledged with restrictions [Annex A]
Correlation curves to CIS in [Annex B]
A specialised company may measure the
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intelligibility
Background Design: Torsten Kranz
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Venas Alarm Signals
VX-2000
Attention-Drawing Signal


minimum one suitable attention-drawing signal before
message (refer to EN 457) [4.1 e]
Distinguishable attention-drawing signals at different
emergency cases [4.1 h]
Attention-Drawing Signals and Messages [4.1 h]




attention-drawing signal before message, 4-10 seconds
duration of attention-drawing signal and messages until
change or end of evacuation
max. 30 seconds between different messages
pauses > 10 seconds: attention-drawing signal
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Background Design: Torsten Kranz
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Venas Documentation (1)
VX-2000
Operation Manual [7.1]
must be quickly available
(preferable at each operation place)
Contents:


practical operation of the system
action to be taken in case of system failure
Performance



graphically if possible
in preferred language
bound document (copy)
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Background Design: Torsten Kranz
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Venas Documentation (2)
VX-2000
System Documentation [7.2a]
To be kept by User or Maintenance Company
Contents:


locations of each part of the devices
measuring results of the system
-
Impedance of each speaker circuit
set values (when adjustable, e.g. volume)
sound pressure level(s)
intelligibility
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Background Design: Torsten Kranz
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Venas Documentation (3)
VX-2000
Maintenance Instructions [7.3.2]
To be kept by User or Maintenance Company
Contents:





Maintenance procedures (order of works)
Maintenance intervals
Parts for maintenance, spare parts, special tools
Suppliers
eventually test certificates
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Background Design: Torsten Kranz
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Venas
VX-2000
Requirements on
the Operation
concerns the user
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Background Design: Torsten Kranz
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Venas Documentation (4)
VX-2000
Log Book [7.2b]

Responsible person must take care on it
Contents:



details of all emergency cases
details of tests and routine checks
details of occurred failures and the repair
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Background Design: Torsten Kranz
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Venas Security of Operation
VX-2000
Maintenance


[7.3.1]
should be done twice a year (maintenance and test)
to be carried out by competent person
Responsible person [4.2]




nominated by owner
is responsible for maintenance
must be trained
manages the log book
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Background Design: Torsten Kranz