Monitoring of substitution
Depending on the grade of an l&HAS, monitoring shall be provided to detect the substitution of l&HAS components. Monitoring shall comply with the requirements of Table 14. When an l&HAS is in a set or unset condition and substitution is detected a tamper signal or message shall be generated.
Table 14 - Monitoring of substitution
|
Monitoring requirements |
Grade 1 |
Grade 2 |
Grade 3 |
Grade 4 |
|
Substitution of l&HAS components |
Op |
Op |
Op |
M |
|
Key: Op = Optional M = Mandatory. |
||||
Monitoring of substitution - Timing requirements
Substitution of l&HAS components shall be detected within the times specified in Table 15.
Table 15 - Monitoring of substitution - Timing
|
Monitoring requirements |
Grade 1 s |
Grade 2 s |
Grade 3 s |
Grade 4 s |
|
Substitution of l&HAS components |
Op |
Op |
100 а |
10 |
|
Key: Op = Optional. |
||||
|
a When detection of substitution is included in grade of l&HAS. |
||||
Interconnections
General
Interconnections shall be suitable for the purpose and designed to provide a reliable means of communication between l&HAS components.
Interconnections shall be designed to minimise the possibility of signals or messages being delayed, modified, substituted or lost requirements for which are specified in the following clauses.
Communication shall be established between l&HAS components to verify that the communication, necessary for the correct functioning of l&HAS can be accomplished as and when required (e.g. when an alarm signal or message is generated).
Interconnections shall be monitored to
detect when availability fails to meet the requirements specified in 8.8.2 and 8.8.3 below,
detect the delay, modification, substitution or loss of a signal or message as required in 8.8.5 below.
When interconnections are functioning normally, a signal or message shall be conveyed from the source to the destination component within 10 s.
When the interconnection media can be influenced from outside the supervised premises, special measures shall be taken to ensure that signals or messages cannot be delayed, modified, substituted or lost as specified in Table 19.
Availability of interconnections
Interconnections shall be available to provide a reliable means of conveying signals or messages.
When interconnections are shared with other applications the availability of the interconnection, to an l&HAS shall be sufficient to meet the requirements of this standard.
Monitoring of interconnections
Table 16 specifies the maximum permitted period for an interconnection to be unavailable. When the maximum permitted period is exceeded a tamper or fault signal or message shall be generated as specified in Table 20.
Table 16 - Maximum unavailability of interconnections
|
|
Grade 1 s |
Grade 2 s |
Grade 3 s |
Grade 4 s |
|
Maximum permitted duration of unavailability |
100 |
100 |
100 |
10 |
|
NOTE The requirement above is intended to establish if communication is possible by monitoring the communication media to ascertain if it is available to convey a signal or message. Monitoring may take the form of listening for jamming when RF techniques are employed or when an l&HAS shares a BUS system with other applications checking that another application has not taken permanent control of the BUS. |
||||
In grades 1 and 2 l&HAS, when the time period between periodic communications (see 8.8.4.1) exceeds 100 s, the interconnection media shall be monitored to establish its availability to convey signals or messages.
Verification
Interconnection integrity - Periodic communication
Interconnection integrity shall be continually verified at intervals not exceeding those specified in Table 17. In the event of communication not being verified as specified in Table 17, signals or messages shall be generated as follows:
when communication cannot be verified because of an identified fault condition, a fault signal or message shall be generated as shown in Table 20;
when communication cannot be verified but no identified reason exists a tamper or fault signal or message shall be generated as shown in Table 20.
Table 17 - Verification intervals
|
|
Grade 1 min |
Grade 2 min |
Grade 3 s |
Grade 4 s |
|
Maximum permitted intervals between periodic communication signals or messages |
240 |
120 |
100 |
10 |
Verification during the setting procedure
Setting of an l&HAS shall be prevented when the last verification signal or message from any system component exceeds the periods specified in Table 18.
Table 18 - Maximum time period from last signal or message
|
|
Grade 1 min |
Grade 2 min |
Grade 3 s |
Grade 4 s |
|
Maximum time from the receipt of the last signal or message |
60 |
20 |
60 |
10 |
Security of communication
Grade 4 l&HAS shall include means to detect the delay, modification, substitution or loss of any signals or messages as specified in Table 19.
The maximum permitted time period to detect the delay, modification, substitution or loss of any signal or message shall not exceed those shown in Table 17 plus 10 s.
In the event of a delay, modification, substitution or loss of any signal or message being detected a fault or tamper signal or message shall be generated as shown in Table 20.
Table 19 - Security of signals and messages
|
|
Grade 1 |
Grade 2 |
Grade 3 |
Grade 4 |
|
Delay, modification, substitution or loss of signals or messages |
Op |
Op |
Op |
M |
|
Key: Op = Optional M = Mandatory. |
||||
Signals or Messages to be generated
Signals or messages, arising from the requirement of the subclauses included in Table 20, shall be generated as specified in Table 20.
Table 20 - Signals or messages to be generated
|
Requirements |
Grade 1 |
Grade 2 |
Grade 3 |
Grade 4 |
|
Signal or Message |
Signal or Message |
Signal or Message |
Signal or Message |
|
|
Monitoring of interconnections (8.8.3) |
T or F |
Tor F |
T |
T |
|
Periodic communication (8.8.4.1 a) |
F |
F |
F |
F |
|
Periodic communication (8.8.4.1 b) |
T or F |
T or F |
T |
T |
|
Security of communication (8.8.5) |
Tor F |
T or F |
T |
T |
Key: T = Tamper F = Fault.
NOTE The generation of signals or messages is required only when mandatory in the applicable subclause.
l&HAS timing performance
Intruder detection, tampering, triggering, and the recognition of faults - Timing requirements
Intruder, hold-up, and tamper signals with an active period exceeding 400 ms shall be processed. Fault signals present for more than 10 s shall be processed.
NOTE Hold-up, intruder, tamper and fault messages need to be present only for the period necessary to ensure communication is successful.
Processing
Intruder, hold up, tamper and fault signals and/or messages shall be notified within 10 s.
Event recording
Dependent upon the Grade of an l&HAS, the events specified in Table 22 shall be recorded.
The means used to record the mandatory events shall be protected against the accidental or deliberate deletion or alteration of the contents.
The means of recording events shall have a capacity complying with the requirements of Table 21. When the capacity of the means of recording is finite and the event recorder reaches maximum capacity, further events may cause the oldest events to be erased.
Grades 2, 3 and 4 l&HAS shall record, in addition to the event, the time and date at which the event occurred. The timing shall be accurate to within ± 10 min per annum at a nominal 20 °С.
The means of recording events may be included in l&HAS components or at an alarm receiving centre. When event recording is provided at an ARC or another remote location an indication shall be provided if the transmission of events to the remote location has been unsuccessful. Grade 2, 3, and 4 l&HAS shall include means to store events awaiting transmission. Remote means of recording shall comply with the requirements of Table 21.
NOTE When the recording of events is accomplished in an alarm receiving centre the means of notification necessary needs to be provided in an l&HAS. The means of recording events at an alarm receiving centre should comply with the requirements of 8.10.
In grades 3 and 4 a facility to make a permanent record of the events recorded shall be provided. This facility need not include the means of producing the permanent record.
The number of events recorded from any single source shall be limited to at least three and a maximum of 10 during any set or unset period.
Table 21 - Event recording - Memory
|
Capacity & endurance |
Grade 1 |
Grade 2 |
Grade 3 |
Grade 4 |
|
Memory capacity - Minimum number of events |
Op |
250 events |
500 events |
1 000 events |
|
Minimum endurance of memory after l&HAS power failure |
Op |
30 days |
30 days |
30 days |
|
Key: Op = Optional. |
||||
Table 22 - Event recording - Events to be recorded
|
Events |
Grade 1 |
Grade 2 |
Grade 3 |
Grade 4 |
|
User identity when setting/unsetting (when possible) |
Op |
Op |
M |
M |
|
Set/Part set |
Op |
M |
M |
M |
|
Unset |
Op |
M |
M |
M |
|
Hold-up alarm condition |
Op |
M |
M |
M |
|
Hold-up zone identification |
Op |
Op |
M |
M |
|
Intruder alarm condition |
Op |
M |
M |
M |
|
Intruder zone identification |
Op |
Op |
M |
M |
|
Tamper condition |
Op |
M |
M |
M |
|
Individual intrusion detector identification (see 8.5.4) |
Op |
Op |
M |
M |
|
Zone/lntrusion detector/Hold-up device inhibited |
Op |
M |
M |
M |
|
Zone/lntrusion detector/Hold-up device Isolated |
Op |
M |
M |
M |
|
Detector(s) fault |
Op |
Op |
M |
M |
|
Hold-up device(s) fault |
Op |
Op |
M |
M |
|
Prime power source fault |
Op |
Op |
M |
M |
|
Alternative power source fault |
Op |
Op |
M |
M |
|
Interconnections fault |
Op |
M |
M |
M |
|
ATS(s) fault |
Op |
M |
M |
M |
|
Warning device(s) fault |
Op |
M |
M |
M |
|
Other faults |
Op |
Op |
Op |
Op |
|
Overriding of prevention of setting conditions |
Op |
M |
M |
M |
|
Detector first to alarm |
Op |
M |
M |
M |
|
Battery change required a |
Op |
Op |
M |
M |
|
Zone/Detector overridden |
Op |
M |
M |
M |
|
Changes to time and date |
Op |
Op |
M |
M |
|
Changes to site specific data |
Op |
Op |
M |
M |
|
Addition/deletion of level 2 users by level 3 user |
Op |
M |
M |
M |
|
Detection of substitution (8.7.3) |
Op |
Op |
Op |
M |
|
Key: Op = Optional M = Mandatory. NOTE The inclusion of requirements to record events in Table 22 does not imply a requirement to provide the associated function, however when functions related to the events to be recorded are provided, events arising should be recorded as required by Table 22. |
||||
|
a Only applicable to primary cells. |
||||
Power supply
Types of power supply
Power supplies included in l&HAS shall comply with the requirements of EN 50131-6 at the appropriate grade and environmental class
Type A: A prime power source, e.g. mains supply, and an alternative power source recharged by an l&HAS, e.g. a rechargeable battery, automatically recharged by an l&HAS.
Type B: A prime power source and an alternative power source not recharged by an l&HAS, e.g. a battery, not automatically recharged by an l&HAS.
Type C: A prime power source with finite capacity, e.g. a battery.
Requirements
The power supply shall be capable of supporting the l&HAS in all conditions including when recharging storage devices within the periods specified in Table 24. The power supply may be placed in one or more l&HAS components or in a separate housing.
A change over between the prime power source and the alternative power source and back again, shall not create an alarm condition, or otherwise influence the status of an l&HAS.
In all grades of l&HAS having a type C power supply as the prime power source, the prime power source shall be capable of powering the l&HAS for a minimum of one year, in all the conditions of use. Type C power supply shall generate a fault signal or message before the voltage falls below the level required for the normal operation of an l&HAS.
In all l&HAS, using type A or В power supplies, in case of failure of the prime power source, the alternative power source shall be capable of powering an l&HAS for the periods specified in Table 23.
During the periods specified in Table 23 the power supply shall be capable of providing the power required for normal operation of an l&HAS, including sufficient power to ensure the generation of all mandatory indications and notifications resulting from the processing of two separate intruder alarm signals or messages.
Table 23 - Minimum duration of alternative power supply
|
Types of power supply |
Grade 1 h |
Grade 2 h |
Grade 3 h |
Grade 4 h |
|
Type A |
12 |
12 |
60 |
60 |
|
Type В |
24 |
24 |
120 |
120 |
In grades 3 & 4 l&HAS, when a prime power source fault is notified to an alarm receiving centre or other remote centre, the duration the alternative power supply may be halved.
NOTE 1 Notification of prime power supply fault may be delayed for a maximum of 1 h as specified in 8.6.
For Type A and В power supplies when a supplementary prime power source, with automatic change over between the prime power source and the supplementary prime power source is provided, the period the alternative power source is required to power the l&HAS may be reduced to 4 h.
In all grades of l&HAS an indication, in accordance with the requirements of 8.5, shall be provided when the voltage available from the alternative power source falls below the level required for an l&HAS to operate correctly.
NOTE 2 The actual voltage at which the indication is provided does not have a direct relationship to the period the alternative power source is capable of supporting an l&HAS.In l&HAS including a type A power supply, the alternative power source shall be recharged to provide 80 % of maximum capacity within the periods specified in Table 24.
Table 24 - Alternative power supply- Recharge periods
|
Type A PS |
Grade 1 h |
Grade 2 h |
Grade 3 h |
Grade 4 h |
|
Maximum time to recharge |
72 |
72 |
24 |
24 |
