Страница 3: ДСТУ EN 50131-1:2014. Alarm Systems - Intrusion and Hold-Up Systems - Part 1: System Requirements (61223)

Means shall be provided to enable a user with the appropriate level of access, to set and unset an l&HAS whilst minimising the possibility of incorrect operation.

It is permitted to provide means to set and unset an IAS and an HAS and/or to set and unset parts of an IAS, HAS or l&HAS independently.

Setting of an l&HAS or part thereof shall be achieved by an authorised action provided all functions of the system, or part thereof, are in a normal condition. During the setting procedure a setting indication may be provided.

Access levels 2 or 3 users are permitted to set all grades of l&HAS using authorisation codes or equivalent means as specified in Table 3, grade 1.

Setting of an l&HAS or part thereof shall be prevented, unless overridden as permitted in 8.3.6, when one or more of the conditions shown in Table 4 is present.

Table 4 - Prevention of setting

Conditions preventing setting may be overridden by users with the access levels specified in Table 5. Overriding shall be limited to each set period.

Overriding of prevention of set conditions shall be recorded in the event log.

It shall not be possible to override a prevention of set condition if overriding would result in the generation of an alarm condition.

Table 5 - Overriding of prevention of setting conditions

When the setting procedure has been satisfactorily completed there shall be a time limited completion of setting indication to show the system or part thereof has changed to a set state.

NOTE The completion of setting indication should be of sufficient duration to enable a user to ascertain the status of an l&HAS.

In Grades 1 & 2 l&HAS when an l&HAS or part thereof is in a set state:

1. access to the supervised premises or part thereof, via an entry/exit route, shall be prevented, or

2. opening the door to the entry/exit route shall initiate an entry procedure, or

3. indication of the set/unset status shall be provided.

In Grades 3 & 4 l&HAS when an l&HAS or part thereof is in a set state:

1. access to the supervised premises or part thereof, via an entry/exit route, shall be prevented, or

2. opening the door to the entry/exit route shall initiate an entry procedure.

In all grades unsetting of an l&HAS or part thereof shall be achieved by an authorised action.

When an l&HAS or part thereof is unset in accordance with 8.3.7 b) a route from the entry point to the means of unsetting shall be defined. Provided the correct entry procedure has been initiated only detectors in the defined route shall be ignored to permit access to the unsetting device.

NOTE Unsetting by entering a supervised area via an entry/exit route is one means of unsetting. Unsetting without entering a supervised area is also permitted i.e. unsetting from outside the supervised area.

A maximum period of 45 s shall be permitted to complete the unsetting procedure. During this period there shall be an entry indication. If unsetting is not completed within the defined period, e g. the expiry of the entry time, an alarm condition shall be notified. When the unsetting procedure has been satisfactorily completed in accordance with this clause there shall be a completion of unsetting indication to show the system or part thereof has changed to the unset state. The completion of unsetting shall be indicated for a maximum of 30 s (see Table 9).

When an alarm condition occurs during the unsetting procedure the alarm condition shall be notified by a warning device or indicated. When remote notification is included in the intruder alarm system, the alarm condition shall not be remotely notified until the indicator or warning device has operated for a minimum of 30 s and the entry timer has expired.

NOTE When an IAS is in the unsetting procedure the indication referred to in the above paragraph is not restricted by the requirements of Table 9.

l&HAS shall include the means necessary to restore the l&HAS or part thereof following an intruder, hold-up, tamper or fault condition. Access to the means of restoring shall be restricted to users with access levels specified in Table 6.

It is permitted to restore any grade of IAS remotely providing the requirements specified in 8.3.1 and 8.3.2 are achieved and information is available to determine the cause of condition to be restored.

Table 6 - Restoring

l&HAS may include the means necessary to inhibit the operation of individual or groups of functions. Access to the means of inhibiting shall be restricted to users with access levels 2 or 3.

l&HAS may include the means necessary to isolate the operation of individual or groups of functions. Access to the means of isolation shall be restricted to users with the following access levels:

• grades 1 & 2 access levels 2 or 3;

• grades 3 & 4 access level 3.

l&HAS shall include means for a user, at access level 2, to carry out a functional test of intrusion detectors and hold-up device(s), provided such tests are non destructive.

l&HAS may include the means necessary to carry out other operations not specifically included in this standard.

Other operations which directly or indirectly adversely influence the functions of an l&HAS shall be carried out by a user with access level 3.

Processing of signals or messages shall depend on the status, type of signal or message and the configuration of an l&HAS.

Table 7 specifies requirements for the processing of hold-up, intruder, tamper and fault signals and/or messages.

Individual detectors may be logically grouped requiring the generation of one or more intruder signals or messages from one or more detectors to generate an intruder alarm condition.

An individual detector may be configured to require more than one activation to generate an intruder alarm signal or message.

Signals and/or messages from intrusion detectors shall be processed as specified in Table 7. Following notification of an alarm condition an l&HAS may remain capable of notifying further alarm conditions provided the maximum duration of operation of the external audible WD is restricted in accordance with national or local regulations.

NOTE Multiple intruder alarm, tamper or fault conditions notified to an alarm receiving centre should be processed at the ARC to avoid unwanted response.

Signals and/or messages from hold-up devices shall be processed as specified in Table 7.

After notification of a hold-up alarm condition(s), further signals and/or messages from hold-up devices shall continue to be processed as indicated in Table 7.

Multiple signals and/or messages from the same hold-up device need not be processed as required by Table 7 if they occur within less then 180 s of the previous signal or message.

Depending on the grade of an l&HAS tamper signals or messages shall be processed as specified in Table 7.

Dependent upon the grade of an l&HAS fault signals or messages shall be processed as specified in Table 7.

Masking signals or messages shall be processed as intruder or fault signals or messages in accordance with Table 7.