EN 54-21 Fire detection and fire alarm systems – Part 21: Alarm transmission and fault warning routing equipment
1 Scope
This European Standard specifies requirements, test methods and performance criteria against which the effectiveness and reliability of routing equipment capable of transmitting fire alarm and/or fault warning signals for use with fire detection and fire alarm systems installed in buildings can be assessed (see EN 54¬1). The routing equipment is designed to allow the system to function in accordance with the requirements of this European Standard. It also provides for the evaluation of conformity of the equipment to the requirements of this standard.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 54-1:1996, Fire detection and fire alarm systems — Part 1: Introduction
EN 54-2:1997, Fire detection and fire alarm systems — Part 2: Control and indicating equipment
EN 54-4:1997, Fire detection and fire alarm systems — Part 4: Power supply equipment
EN 50130-4, Alarm systems — Part 4: Electromagnetic compatibility — Product family standard: Immunity requirements for components of fire, intruder and social alarm systems
EN 50136-1-1:1998, Alarm systems — Alarm transmission systems and equipment — Part 1-1: General requirements for alarm transmission systems
EN 50136-2-1:1998, Alarm systems — Alarm transmission systems and equipment — Part 2-1: General requirements for alarm transmission equipment
EN 60068-1, Environmental testing – Part 1: General and guidance (IEC 60068-1:1988 + Corrigendum 1988 + A1:1992)
EN 60068-2-1, Environmental testing; part 2: tests; tests A: cold (IEC 60068-2-1:1990)
EN 60068-2-6, Environmental testing – Part 2: Tests – Tests Fc: Vibration (sinusoidal) (IEC 60068-2-6:1995 + Corrigendum 1995)
EN 60068-2-47, Environmental testing – Part 2-47: Test Mounting of specimens for vibration, impact and similar dynamic tests (IEC 60068-2-47:2005)
EN 60068-2-75, Environmental testing – Part 2: Tests – Test Eh: Hammer tests (IEC 60068-2-75:1997)
EN 60068-2-78, Environmental testing – Part 2-78: Tests; Test Cab: Damp heat, steady state (IEC 60068-2¬78:2001)
EN 60529:1991, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989)
EN 60721-3-3:1995, Classification of environmental conditions – Part 3: Classification of groups of environmental parameters and their severities – Section 3: Stationary use at weatherprotected locations (IEC 60721-3-3:1994)
EN ISO 9001:2000, Quality management systems — Requirements (ISO 9001:2000).
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 54-1:1996, EN 54-2:1997, EN 54¬4:1997 and EN 50136-1-1:1998, 4.7 apply.
3.2 Abbreviations
For the purposes of this document, the following abbreviations apply: CIE: Control and indicating equipment, PSE: Power supply equipment.
4 General requirements
4.1 General
If functions other than those specified in this European Standard are provided, they shall not jeopardize the compliance with any requirements of this European Standard.
4.2 Compliance
In order to comply with this standard the routing equipment shall meet the requirements of this clause, which shall be verified by visual inspection or engineering assessment, shall be tested as described in Clause 5 and shall meet the requirements of the tests.
5 Functional requirements
5.1 Alarm transmission routing equipment
The alarm transmission routing equipment shall be capable of processing the following signals:
5.2 Fault warning routing equipment
5.3 Indication of signals
The following signals shall be indicated at the routing equipment by separate light-emitting indicators for a) and b). Alternatively, the signals can be indicated at the CIE, in which case it is not necessary to indicate the signals at the routing equipment.
a) The received acknowledgement signal from fire alarm receiving centre as defined in EN 50136-2-1:1998,
5.5.
6 Alarm transmission and fault warning systems requirements
The performance requirements of transmission systems shall be as specified in Annex A. The verification of this performance is detailed in Annex B.
7 Design requirements
7.1 General requirements and manufacturer’s declarations
The routing equipment shall comply with the design requirements of 7.3 relevant to the technology used. Some requirements can be verified by testing. Others (e.g. long-term reliability of the routing equipment) can only be verified by inspection of the design and its accompanying documentation (product or system specification, reports etc.).
In order to assist the process of design inspection, the manufacturer shall declare the following in writing:
a) that the design has been carried out in accordance with a factory production control system, which incorporates a set of rules for the design of all elements of the routing equipment;
b) that all the components of the routing equipment have been selected for the intended purpose and are expected to operate within their specification when the environmental conditions outside the enclosure of the routing equipment comply with class 3K5 of EN 60721-3-3:1995.
7.2.2 The manufacturer shall also prepare design documentation, which shall be submitted to the testing authority together with the routing equipment. This documentation shall include drawings, parts lists, block diagrams, circuit diagrams and a functional description to such an extent that compliance with this standard may be checked and that a general assessment of the mechanical and electrical design is made possible.
7.2 Mechanical design requirements
7.3.1 The enclosure of the routing equipment shall be of robust construction, consistent with the method of installation recommended in the documentation. It shall meet at least classification IP30 of EN 60529:1991 at access level 2.
7.3.2 All light emitting indicators shall be clearly labelled to indicate their purpose. The information shall be legible at 0,8 m distance in an ambient light intensity from 100 lux to 500 lux.
7.3.3 The terminals for transmission paths and the fuses shall be clearly labelled.
7.3 Electrical and other design requirements
7.4.1 The processing of signals shall give the highest priority to the transmission of fire alarms (item E of Figure 1 of EN 54-1:1996) or fault warning (item J of Figure 1 of EN 54-1:1996). If both E and J are operated in the same routing equipment, then the highest priority should be given to fire alarms.
7.4.2 The availability of the power supply for the routing equipment shall be as a minimum on the same level as the availability of the power supply for the CIE required by EN 54-4.
7.4.3 Transitions between the main and the stand-by power sources shall not change any indications and/or the state of any outputs, except those relating to the power supplies.
7.4.4 If the routing equipment has provision for disconnecting or adjusting the main or the stand-by power source, this shall only be possible at access level 3 or 4.
7.4 Integrity of transmission paths
7.5.1 A fault in any transmission path between the routing equipment and the transmission network (as defined in EN 50136-1-1) shall not affect the correct functioning of the routing equipment or any other transmission path.
7.5.2 If the routing equipment is designed to be used with a power supply (item L of Figure 1 of EN 54¬1:1996) contained in a separate enclosure, then an interface shall be provided for at least two transmission paths to the power supply, so that a short circuit or an interruption in one does not prevent the supply of power to the routing equipment.
Access levels shall be provided on the routing equipment, from access level 1 (most accessible) to access level 4 (least accessible). Manual controls and other functions shall be grouped on the appropriate access level, as specified in EN 54-2:1997, 12.6.
7.5 Indications by means of light-emitting indicators
7.7.1 Mandatory indications from light-emitting indicators shall be visible in an ambient light intensity up to 500 lx, at any angle up to 22,5 from a line through the indicator perpendicular to its mounting surface:
7.7.2 If flashing indications are used, the on- and/or the off-periods shall be not less than 0,25 s and the frequencies of flash shall be not less than 0,2 Hz for fault indications.
7.6 Colours of indications
The colours of the general and specific indications from light-emitting indicators shall be yellow for indications of fault warnings and red for the indication of the acknowledgement.
7.7 Testing of indicators
All mandatory visible indicators at the routing equipment shall be testable by manual operation at access level 1 or 2.
7.10 Additional design requirements for software-controlled routing equipment
7.10.1 General requirements and manufacturer’s declarations
The routing equipment may contain elements which are controlled by software in order to fulfil requirements of this European Standard. In this case, the routing equipment shall comply with the requirements of 7.10, as well as those of Clause 7, where relevant to the technology used. See also Annex C.
The functional description of the main program flow shall be explained using a clear methodology appropriate to the nature of the software, e.g. graphical representations of the system design, data flows and control flows;
b) description of which areas of memory are used to store the program, site specific data and running data.
Where dynamic memory management is employed, a separation shall be implemented between the program, site specific data and running data, and this shall be described in connection with the method of memory allocation;
c) a description of how the software interacts with the hardware of the routing equipment.
b) details of any software tools used in the preparation of the program (e.g. high level design tools, compilers or assemblers).
7.10.4.1 The execution of the program shall be monitored as under 7.10.4.2 or 7.10.4.3. If routines associated with the main functions of the program are no longer executed, this shall be indicated at least as a common fault warning as in Clause 5.
7.10.4.2 If the program executes in one processor, the execution of the routines as in 7.10.4.1 shall be monitored by a monitoring device as in 7.10.4.4.
7.10.4.3 If the program executes in more than one processor, the execution of the routines as in 7.10.4.1 shall be monitored in each processor. A monitoring device as in 7.10.4.4 shall be associated with one or more processors, and at least one such processor shall monitor the functioning of any processor not associated with such a monitoring device.
7.10.4.4 The monitoring device of 7.10.4.2 and 7.10.4.3 shall have a time base independent of that of the monitored system. 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.
7.10.4.5 In the event of a system fault as specified in 7.10.4.1 or 7.10.6, those parts of the routing equipment affected shall enter a safe state not later than the indication of the system fault. This safe state shall not result in the false activation of mandatory signals.
7.10.2 The storage of programs and data
7.10.5.1 All executable code and data necessary to comply with this European Standard shall be held in memory which is capable of continuous, non-maintained, reliable operation for a period of at least 10 years.
7.10.5.2 For the program, the following requirements shall apply:
a) the program shall be held in non-volatile memory, which can only be written to at access level 4;
b) it shall be possible to identify the version reference or references of the program at access level 3. The version reference or references shall be in accordance with the documentation of 7.10.2.1.
c) The monitoring of memory contents
The contents of the memories containing the site specific data 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.
8 Power supply
The routing equipment shall be powered by the fire alarm system power supply (item L of Figure 1 of EN 54-1:1996 as specified by EN 54-4) or by a separate power supply (item L of Figure 1 of EN 54-1:1996 as specified by EN 54-4).
The temperature and humidity shall be substantially constant for each environmental test where the standard atmospheric conditions are applied.
10.1.2 Specimen configuration
The? specimen configuration shall include the connection to the transmission path to the CIE and the network as s pecified by the manufacturer.
10.1.3 Mounting and orientation
Unless otherwise stated in a test procedure, the specimen shall be mounted in its usual orientation by the normal means of mounting indicated by the manufacturer. Where required for functional testing, the equipment shall be in the condition of access level 1, except where otherwise required for functional testing.
10.1.4 Electrical connection
If the test procedure requires the specimen to be in the operating condition, it shall be connected to or powered by a power supply according to EN 54-4.
Unless otherwise required, the power supply shall be in the nominal operating condition.
All transmission paths shall be connected to cables and equipment or to dummy loads. Equipment other than the routing equipment may be kept in the standard atmospheric conditions during the tests.
10.1.5 Provisions for tests
At least one example of the routing equipment shall be provided for testing compliance with this standard.
The specimen(s) submitted shall be representative of the manufacturer’s normal production and shall include the claimed options.
10.2 Functional test
10.2.1 Object of the test
The object of the functional test is to demonstrate the operation of the equipment before, during and/or after the environmental conditioning.
10.3.2 Tests for one specimen
If a single specimen is supplied for environmental testing, the specimen shall be subjected to all of the tests. These may be carried out in any order. A functional test shall be carried out before and after each environmental test. The functional test after one environmental test may be taken as the functional test before the next environmental test.
10.3.3 Tests for more than one specimen
If more than one specimen is supplied for environmental testing, the tests may be divided between the specimens and carried out in any order. A functional test shall be carried out before and after each environmental test. For each specimen, the functional test after one environmental test may be taken as the functional test before the next environmental test.
10.3.4 Requirements
During the tests of 10.4 to 10.11 the specimen shall not change status in any of the functional conditions as specified in the corresponding clauses, except when such a change is required by the test procedure or when the change is a result of a functional test.
Any mechanical damage to the specimen, observed following the tests of 10.4, 10.5, 10.6, 10.7, 10.10 and 10.11, shall not jeopardize any mandatory function of this European Standard.
When subjected to the functional test each specimen shall respond correctly (see 10.2). 10.4 Cold (operational)
10.4.1 Object of the test
The object of the test is to demonstrate the ability of the specimen to function correctly at low ambient temperatures appropriate to the anticipated service environment.
10.4.2 Test procedure
10.4.2.1 General
The test procedures with gradual changes in temperature described in EN 60068-2-1 shall be used. Test Ad shall be used for heat-dissipating specimens (as defined in EN 60068-2-1) and test Ab shall be used for non heat-dissipating specimens.
10.4.2.4 Measurements during conditioning
Monitor the specimen during the conditioning period to detect any change in status. During the last hour of the conditioning period, subject the specimen to the functional test.
10.4.2.5 Final measurements
After the recovery period, subject the specimen to the functional test and inspect it visually for mechanical damage both externally and internally.
10.5 Damp heat, steady state (operational)
10.5.1 Object of the test
The object of the test is to demonstrate the ability of the specimen to function correctly at high relative humidity (without condensation), which may occur for short periods in the service environment.
10.5.2 Test procedure
10.5.2.1 General
Use the test procedure described in EN 60068-2-78.
10.5.2.2 Initial examination
Before conditioning, subject the specimen to the functional test.
After the recovery period, subject the specimen to the functional test and inspect it visually for mechanical damage both externally and internally.
10.6 Impact (operational)
10.6.1 Object of the test
The object of the test is to demonstrate the immunity of the equipment to mechanical impacts upon the surface, which it may sustain in the normal service environment and which it can reasonably be expected to withstand.
10.6.2 Test procedure
10.6.2.1 General
Apply the test apparatus and procedure described in EN 60068-2-75, test Ehb.
10.6.2.2 Initial examination
Before conditioning, subject the specimen to the functional test.
10.6.2.3 State of the specimen during conditioning
Mount the specimen as specified in 10.1.3 and connect it to a suitable power supply, monitoring and loading equipment (see 10.1.4).
The specimen shall be in the quiescent condition.
10.6.2.4 Conditioning
Apply impacts to all surfaces of the specimen that are accessible at access level 1.
For all such surfaces three blows shall be applied to any point(s) considered likely to cause damage to or impair the operation of the specimen.
Care shall be taken to ensure that the results from a series of three blows do not influence subsequent series.
In case of doubts, the defect shall be disregarded and a further three blows shall be applied to the same position on a new specimen.
10.6.2.5 Measurements during conditioning
Monitor the specimen during the conditioning periods to detect any changes in functional condition and to ensure that results of three blows do not influence subsequent series.
10.6.2.6 Final measurements
After the conditioning, subject the specimen to the functional test and inspect it visually for mechanical damage, both externally and internally.
10.7 Vibration, sinusoidal (operational)
10.7.1 Object of the test
The object of the test is to demonstrate the immunity of the equipment to vibrations at levels appropriate to the service environment.
10.7.2 Test procedure
10.7.2.1 General
Use the test procedure described in EN 60068-2-6.
10.7.2.2 Initial examination
Before conditioning, subject the specimen to the functional test.
10.7.2.3 State of the specimen during conditioning
Mount the specimen as specified in 10.1.3 and in accordance with EN 60068-2-47 and connect it to a suitable power supply, monitoring and loading equipment (see 10.1.4).
The specimen shall be in the quiescent condition.
10.7.2.4 Conditioning
Subject the specimen to vibration in each of the three mutually perpendicular axes in turn, one of which shall be perpendicular to the plane of mounting of the specimen.
Apply the following severity of conditioning:
Number of sweep cycles per axis: 1 for each functional condition.
10.7.2.5 Measurements during conditioning
Monitor the specimen during the conditioning periods to detect any changes in functional condition.
10.7.2.6 Final measurements
After the conditioning, subject the specimen to the functional test and inspect it visually for mechanical
damage both externally and internally.
10.8 Electromagnetic (EMC) immunity tests (operational)
10.8.1 The following EMC immunity tests shall be carried out as described in EN 50130-4:
a) mains supply voltage variations 1);
b) mains supply voltage dips and interruptions ‘;
c) electrostatic discharge;
d) radiated electromagnetic fields;
e) conducted disturbances induced by electromagnetic fields;
f) fast transient bursts;
g) slow high energy voltage surges.
10.8.2 For the tests of 10.8.1, the following shall apply:
a) the functional test, called for in the initial and final measurements, shall be the functional test described in 10.2,
b) the required operating condition shall be as described in 10.1.4 and the equipment shall be tested in the quiescent condition,
c) the connections to the various inputs and outputs shall be made with unscreened cables, unless the manufacturer’s installation data specifies that only screened cables shall be used,
d) in the electrostatic discharge test, the discharges shall be applied to parts of the equipment accessible at access level 2,
e) in the fast transient burst test, the transients shall be applied to the a.c. mains lines by the direct injection method and to the other inputs, signal, data and control lines by the capacitive clamp method,
f) if the equipment has a number of identical types of inputs or outputs, then the tests of 10.8.1 e), f), and g), and if applicable a) and b), shall be applied to one of each type.
10.9 Supply voltage variation (operational)
10.9.1 Object of the test
The object of the test is to demonstrate the ability of the specimen to function correctly over the anticipated range of supply voltage conditions.
10.9.2 Test procedure
10.9.2.1 General
The specimen shall be subjected to each of the power supply conditions specified in 10.9.2.4 until temperature stability is reached and the functional test has been conducted.
10.9.2.2 Initial examination
Before conditioning, subject the specimen to the functional test.
10.9.2.3 State of the specimen during conditioning
Mount the specimen as specified in 10.1.3 and connect it to suitable power supply, monitoring and loading equipment (see 10.1.4).
The specimen shall be in the quiescent condition.
10.9.2.4 Conditioning
Apply the following conditions:
a) supply of power at the maximum input voltage as specified by the manufacturer, or for a CIE with an integrated PSE the conditions specified in Table 1 of EN 54-4:1997;
b) supply of power at the minimum input voltage as specified by the manufacturer, or for a CIE with an integrated PSE the conditions specified in Table 1 of EN 54-4:1997.
10.9.2.5 Measurements during conditioning
Monitor the specimen at the supply voltage conditions until temperature stability is reached and then subject the specimen to the functional test at each voltage condition.
10.9.2.6 Final measurements
After the conditioning, subject the specimen to the functional test.
10.10 Damp heat, steady state (endurance)
10.10.1 Object of the test
The object of the test is to demonstrate the ability of the equipment to withstand the long-term effects of humidity in the service environment (e.g. changes in electrical properties due to absorption, chemical reactions involving moisture, galvanic corrosion).
10.10.2 Test procedure 10.10.2.1 General
Use the test procedure described in EN 60068-2-78.
10.10.2.2 Initial examination
Before conditioning, subject the specimen to the functional test.
10.10.2.3 State of the specimen during conditioning
Mount the specimen as required in 10.1.3 and connect to suitable power supply, monitoring and loading equipment (see 10.1.4). The specimen shall not be supplied with power during the conditioning.
10.10.2.4 Conditioning
Apply the following severity of conditioning: Temperature: (40 ± 2) °C,
Relative humidity: (93 ) %,
Duration: 21 days.
Pre-condition the specimen at the conditioning temperature (40 ± 2) °C until temperature stability has been reached, to prevent the formation of water droplets on the specimen.
10.10.2.5 Final measurements
After the recovery period, subject the specimen to the functional test and inspect it visually for mechanical damage both externally and internally.
10.11 Vibration, sinusoidal (endurance)
10.11.1 The object of the test